January 2016 - Alsa-devel - mailman.alsa-project.org

[alsa-devel] [PATCH] ALSA: hda - Add fixup for Dell Latitidue E6540
by Takashi Iwai 15 Jan '16

15 Jan '16

Another Dell model, another fixup entry: Latitude E6540 needs the same fixup as other Latitude E series as workaround for noise problems. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=104341 Cc: <stable(a)vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai(a)suse.de> --- sound/pci/hda/patch_realtek.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index 61d8502e6b08..8143c0e24a27 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -5331,6 +5331,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = { SND_PCI_QUIRK(0x1028, 0x0470, "Dell M101z", ALC269_FIXUP_DELL_M101Z), SND_PCI_QUIRK(0x1028, 0x054b, "Dell XPS one 2710", ALC275_FIXUP_DELL_XPS), SND_PCI_QUIRK(0x1028, 0x05bd, "Dell Latitude E6440", ALC292_FIXUP_DELL_E7X), + SND_PCI_QUIRK(0x1028, 0x05be, "Dell Latitude E6540", ALC292_FIXUP_DELL_E7X), SND_PCI_QUIRK(0x1028, 0x05ca, "Dell Latitude E7240", ALC292_FIXUP_DELL_E7X), SND_PCI_QUIRK(0x1028, 0x05cb, "Dell Latitude E7440", ALC292_FIXUP_DELL_E7X), SND_PCI_QUIRK(0x1028, 0x05da, "Dell Vostro 5460", ALC290_FIXUP_SUBWOOFER), -- 2.7.0

1 0

[alsa-devel] Adding channels on multicodec soundcard
by Steven Wawryk 15 Jan '16

15 Jan '16

Hi, I'm trying to write an ALSA soundcard driver module for an embedded Zynq-based system with 4 Cirrus CS42448 codecs. Each codec has 6 analog output channels and I'd like the "soundcard" to have 24 channels (6 to each codec). I've been having trouble getting it to do this. The hw_params for the codec, card and "I2S" IP core drivers all get the same parameters, including number of channels. When I define 4 snd_soc_dai_link's, each with 1 codec, then 4 "devices" are set up for the card and I can access 6 channels on 1 codec (1 "device") at a time. When I define 1 snd_soc_dai_link with 4 codecs then 1 "device" is set up and I can still only access 6 channels, but it appears to use all 4 codecs (somehow - I haven't yet worked out the channel allocation). I can't seem to get 24 channels to the card, splitting into 6 channels to each of the codecs. Can anyone suggest how I should be going about this? The linux kernel is 3.17 from PetaLinux (Xilinx). Cheers, Steve

2 3

[alsa-devel] [PATCH] ALSA: hda - hdmi create spdif ctl based on pcm
by libin.yang＠linux.intel.com 15 Jan '16

15 Jan '16

From: Libin Yang <libin.yang(a)linux.intel.com> SPDIF ctl should be based on pcm. Each spdif ctl controls one pcm state. This patch creates spdif based on pcm and no longer based on pin. Signed-off-by: Libin Yang <libin.yang(a)linux.intel.com> --- sound/pci/hda/patch_hdmi.c | 27 ++++++++++++++++++--------- 1 file changed, 18 insertions(+), 9 deletions(-) diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index dfb7c26..2f949fb 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -2255,6 +2255,7 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo, hinfo->nid = 0; mutex_lock(&spec->pcm_lock); + snd_hda_spdif_ctls_unassign(codec, pcm_idx); clear_bit(pcm_idx, &spec->pcm_in_use); pin_idx = hinfo_to_pin_index(codec, hinfo); if (spec->dyn_pcm_assign && pin_idx < 0) { @@ -2276,8 +2277,6 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo, pinctl & ~PIN_OUT); } - snd_hda_spdif_ctls_unassign(codec, pcm_idx); - mutex_lock(&per_pin->lock); per_pin->chmap_set = false; memset(per_pin->chmap, 0, sizeof(per_pin->chmap)); @@ -2560,19 +2559,29 @@ static int generic_hdmi_build_controls(struct hda_codec *codec) err = generic_hdmi_build_jack(codec, pcm_idx); if (err < 0) return err; - } - for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) { - struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx); - - err = snd_hda_create_dig_out_ctls(codec, + /* create the spdif for each pcm + * pin will be bound when monitor is connected + */ + if (spec->dyn_pcm_assign) + err = snd_hda_create_dig_out_ctls(codec, + 0, spec->cvt_nids[0], + HDA_PCM_TYPE_HDMI); + else { + struct hdmi_spec_per_pin *per_pin = + get_pin(spec, pcm_idx); + err = snd_hda_create_dig_out_ctls(codec, per_pin->pin_nid, per_pin->mux_nids[0], HDA_PCM_TYPE_HDMI); + } if (err < 0) return err; - /* pin number is the same with pcm number so far */ - snd_hda_spdif_ctls_unassign(codec, pin_idx); + snd_hda_spdif_ctls_unassign(codec, pcm_idx); + } + + for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) { + struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx); /* add control for ELD Bytes */ err = hdmi_create_eld_ctl(codec, pin_idx, -- 1.9.1

3 3

[alsa-devel] [PATCH] ALSA: hda - add codec support for Kabylake display audio codec
by libin.yang＠linux.intel.com 14 Jan '16

14 Jan '16

From: Libin Yang <libin.yang(a)linux.intel.com> This patch adds codec ID (0x8086280b) for Kabylake display codec and apply the hsw fix-ups to Kabylake. Signed-off-by: Libin Yang <libin.yang(a)linux.intel.com> --- sound/pci/hda/patch_hdmi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index cd9b0ff..426a29a 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -51,8 +51,10 @@ MODULE_PARM_DESC(static_hdmi_pcm, "Don't restrict PCM parameters per ELD info"); #define is_broadwell(codec) ((codec)->core.vendor_id == 0x80862808) #define is_skylake(codec) ((codec)->core.vendor_id == 0x80862809) #define is_broxton(codec) ((codec)->core.vendor_id == 0x8086280a) +#define is_kabylake(codec) ((codec)->core.vendor_id == 0x8086280b) #define is_haswell_plus(codec) (is_haswell(codec) || is_broadwell(codec) \ - || is_skylake(codec) || is_broxton(codec)) + || is_skylake(codec) || is_broxton(codec) \ + || is_kabylake(codec)) #define is_valleyview(codec) ((codec)->core.vendor_id == 0x80862882) #define is_cherryview(codec) ((codec)->core.vendor_id == 0x80862883) @@ -3667,6 +3669,7 @@ HDA_CODEC_ENTRY(0x80862807, "Haswell HDMI", patch_generic_hdmi), HDA_CODEC_ENTRY(0x80862808, "Broadwell HDMI", patch_generic_hdmi), HDA_CODEC_ENTRY(0x80862809, "Skylake HDMI", patch_generic_hdmi), HDA_CODEC_ENTRY(0x8086280a, "Broxton HDMI", patch_generic_hdmi), +HDA_CODEC_ENTRY(0x8086280b, "Kabylake HDMI", patch_generic_hdmi), HDA_CODEC_ENTRY(0x80862880, "CedarTrail HDMI", patch_generic_hdmi), HDA_CODEC_ENTRY(0x80862882, "Valleyview2 HDMI", patch_generic_hdmi), HDA_CODEC_ENTRY(0x80862883, "Braswell HDMI", patch_generic_hdmi), -- 1.9.1

2 1

[alsa-devel] [PATCH] ALSA: hda - add DP mst verb support
by libin.yang＠linux.intel.com 14 Jan '16

14 Jan '16

From: Libin Yang <libin.yang(a)linux.intel.com> Add snd_hda_get_dev_select() and snd_hda_set_dev_select() functions for DP MST audio support. Signed-off-by: Libin Yang <libin.yang(a)linux.intel.com> --- sound/pci/hda/hda_codec.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++ sound/pci/hda/hda_codec.h | 2 ++ 2 files changed, 56 insertions(+) diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 8374188..95baaba 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -368,6 +368,60 @@ int snd_hda_get_devices(struct hda_codec *codec, hda_nid_t nid, return devices; } +/** + * snd_hda_get_dev_select - get device entry select on the pin + * @codec: the HDA codec + * @nid: NID of the pin to get device entry select + * + * Get the devcie entry select on the pin. Return the device entry + * id selected on the pin. Return 0 means the first device entry + * is selected or MST is not supported. + */ +int snd_hda_get_dev_select(struct hda_codec *codec, hda_nid_t nid) +{ + /* not support dp_mst will always return 0, using first dev_entry */ + if (!codec->dp_mst) + return 0; + + return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_DEVICE_SEL, 0); +} +EXPORT_SYMBOL_GPL(snd_hda_get_dev_select); + +/** + * snd_hda_set_dev_select - set device entry select on the pin + * @codec: the HDA codec + * @nid: NID of the pin to set device entry select + * @dev_id: device entry id to be set + * + * Set the device entry select on the pin nid. + */ +int snd_hda_set_dev_select(struct hda_codec *codec, hda_nid_t nid, int dev_id) +{ + int ret, dev; + unsigned long timeout; + + /* not support dp_mst will always return 0, using first dev_entry */ + if (!codec->dp_mst) + return 0; + + timeout = jiffies + msecs_to_jiffies(500); + + /* make sure the device entry selection takes effect */ + do { + ret = snd_hda_codec_write(codec, nid, 0, + AC_VERB_SET_DEVICE_SEL, dev_id); + udelay(20); + + dev = snd_hda_get_dev_select(codec, nid); + if (dev == dev_id) + break; + msleep(20); + } while (time_before(jiffies, timeout)); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_hda_set_dev_select); + /* * read widget caps for each widget and store in cache */ diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h index 373fcad..22bcad6 100644 --- a/sound/pci/hda/hda_codec.h +++ b/sound/pci/hda/hda_codec.h @@ -349,6 +349,8 @@ int snd_hda_get_conn_index(struct hda_codec *codec, hda_nid_t mux, hda_nid_t nid, int recursive); int snd_hda_get_devices(struct hda_codec *codec, hda_nid_t nid, u8 *dev_list, int max_devices); +int snd_hda_get_dev_select(struct hda_codec *codec, hda_nid_t nid); +int snd_hda_set_dev_select(struct hda_codec *codec, hda_nid_t nid, int dev_id); struct hda_verb { hda_nid_t nid; -- 1.9.1

3 3

[alsa-devel] [PATCH v4 00/14] ASoC: hdac_hdmi: Add DP & notification support
by Subhransu S. Prusty 14 Jan '16

14 Jan '16

This patch series adds DP audio and hotplug notification support. On Skylake two DP ports are available and to enable DP on both ports all pins need to be enabled. There is a special vendor widget which need to be programmed to enable all pins and converters. This series adds hotplug notification, read/set constraint based on ELD, enable all pin/cvts, DP1.2, programs the audio infoframe for DP. There is a one to one mapping between converter and stream, so the dais are created based on the no of streams supported on hdmi codec. Even though cvts can be mapped dynamically to the streams, currently it is statically mapped as simultaneous playback on both DP and HDMI is not supported as of now. Pin muxes and controls are created dynamically to map converter to pin widget. So at run time specific pin is mapped to the dai based on the control selected (based on the display type DP/HDMI connected). Finally the DP audio infoframe programming is added to support the DP feature. Also with hotplug notification support, ELD is read and capabilities are set for rate, formats and channels. drm_eld sound/core framework is updated to limit the formats based on ELD. There are few fixes one fixing the static checker warning and other one not to fail if no connection list is found for a pin widget. Pls note, the 10th patch is adding a small macro for getting connection type in drm header, we have CCed drm folks on that and this one. Pls ack so that we can have this series merged thru sound trees changes in v4: - Added NULL check - Dropped the Jack reporting patch for now. Jeeja KP (2): ASoC: hdac_hdmi: Add codec suspend/resume handler ASoC: hdac_hdmi: Fix to enable device configuration in hw_params Ramesh Babu (1): ASoC: hdac_hdmi: Fix to keep display active while enumerating codec Subhransu S. Prusty (11): ASoC: hdac_hdmi: Fix to check num nodes correctly ASoC: hdac_hdmi: Fix to warn instead of err for no connected nids ASoC: hdac_hdmi: Use list to add pins and converters ASoC: hdac_hdmi: Add hotplug notification and read eld ASoC: hdac_hdmi: Apply constraints based on ELD ASoC: hdac_hdmi: Enable DP1.2 and all converters/pins ASoC: hdac_hdmi: create dais based on number of streams ASoC: hdac_hdmi: Create widget/route based on nodes enumerated ASoC: hdac_hdmi: Assign pin for stream based on dapm connection drm/edid: Add API to help find connection type ASoC: hdac_hdmi: Add infoframe support for dp audio include/drm/drm_edid.h | 12 + sound/soc/codecs/Kconfig | 1 + sound/soc/codecs/hdac_hdmi.c | 1113 +++++++++++++++++++++++++++++++++++------- 3 files changed, 948 insertions(+), 178 deletions(-) -- 1.9.1

4 24

[alsa-devel] sound: spinlock lockup in sound/core/timer.c
by Dmitry Vyukov 13 Jan '16

13 Jan '16

Hello, The following program hangs kernel dead: // autogenerated by syzkaller (http://github.com/google/syzkaller) #include <unistd.h> #include <sys/syscall.h> #include <string.h> #include <stdint.h> #include <pthread.h> long r[42]; void *thr(void *arg) { switch ((long)arg) { case 0: r[0] = syscall(SYS_mmap, 0x20000000ul, 0x2000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); break; case 1: memcpy((void*)0x20000000, "\x2f\x64\x65\x76\x2f\x73\x6e\x64\x2f\x74\x69\x6d\x65\x72", 14); r[2] = open("/dev/snd/timer", 0x181400ul, 0); break; case 2: *(uint32_t*)0x20001000 = (uint32_t)0x1; *(uint32_t*)0x20001004 = (uint32_t)0xfffffffffffffffe; *(uint32_t*)0x20001008 = (uint32_t)0x0; *(uint32_t*)0x2000100c = (uint32_t)0x3; *(uint32_t*)0x20001010 = (uint32_t)0x0; *(uint8_t*)0x20001014 = (uint8_t)0x0; *(uint8_t*)0x20001015 = (uint8_t)0x0; *(uint8_t*)0x20001016 = (uint8_t)0x0; *(uint8_t*)0x20001017 = (uint8_t)0x0; *(uint8_t*)0x20001018 = (uint8_t)0x0; *(uint8_t*)0x20001019 = (uint8_t)0x0; *(uint8_t*)0x2000101a = (uint8_t)0x0; *(uint8_t*)0x2000101b = (uint8_t)0x0; *(uint8_t*)0x2000101c = (uint8_t)0x0; *(uint8_t*)0x2000101d = (uint8_t)0x0; *(uint8_t*)0x2000101e = (uint8_t)0x0; *(uint8_t*)0x2000101f = (uint8_t)0x0; *(uint8_t*)0x20001020 = (uint8_t)0x0; *(uint8_t*)0x20001021 = (uint8_t)0x0; *(uint8_t*)0x20001022 = (uint8_t)0x0; *(uint8_t*)0x20001023 = (uint8_t)0x0; *(uint8_t*)0x20001024 = (uint8_t)0x0; *(uint8_t*)0x20001025 = (uint8_t)0x0; *(uint8_t*)0x20001026 = (uint8_t)0x0; *(uint8_t*)0x20001027 = (uint8_t)0x0; *(uint8_t*)0x20001028 = (uint8_t)0x0; *(uint8_t*)0x20001029 = (uint8_t)0x0; *(uint8_t*)0x2000102a = (uint8_t)0x0; *(uint8_t*)0x2000102b = (uint8_t)0x0; *(uint8_t*)0x2000102c = (uint8_t)0x0; *(uint8_t*)0x2000102d = (uint8_t)0x0; *(uint8_t*)0x2000102e = (uint8_t)0x0; *(uint8_t*)0x2000102f = (uint8_t)0x0; *(uint8_t*)0x20001030 = (uint8_t)0x0; *(uint8_t*)0x20001031 = (uint8_t)0x0; *(uint8_t*)0x20001032 = (uint8_t)0x0; *(uint8_t*)0x20001033 = (uint8_t)0x0; r[40] = syscall(SYS_ioctl, r[2], 0x40345410ul, 0x20001000ul, 0, 0, 0); break; case 3: r[41] = syscall(SYS_ioctl, r[2], 0x54a0ul, 0, 0, 0, 0); break; } return 0; } int main() { long i; pthread_t th[4]; memset(r, -1, sizeof(r)); for (i = 0; i < 4; i++) { pthread_create(&th[i], 0, thr, (void*)i); usleep(10000); } for (i = 0; i < 4; i++) { pthread_create(&th[i], 0, thr, (void*)i); if (i%2==0) usleep(10000); } usleep(100000); return 0; } INFO: rcu_sched detected stalls on CPUs/tasks: (detected by 1, t=26002 jiffies, g=16336, c=16335, q=82) All QSes seen, last rcu_sched kthread activity 26002 (4294782026-4294756024), jiffies_till_next_fqs=3, root ->qsmask 0x0 a.out R running task 30168 32322 30913 0x0000000a ffff880034627600 ffff88003ed07ca8 ffffffff813e63b9 00000000fffcc6b8 00000000fffcc6b8 ffff88003ed20f40 00000000fffd2c4a dffffc0000000000 0000000000000000 ffff88003ed07d80 ffffffff814b21ca 0000000000000000 Call Trace: <IRQ> [<ffffffff813e63b9>] sched_show_task+0x269/0x3b0 kernel/sched/core.c:5036 [< inline >] print_other_cpu_stall kernel/rcu/tree.c:1318 [< inline >] check_cpu_stall kernel/rcu/tree.c:1424 [< inline >] __rcu_pending kernel/rcu/tree.c:3906 [< inline >] rcu_pending kernel/rcu/tree.c:3970 [<ffffffff814b21ca>] rcu_check_callbacks+0x1dfa/0x1e10 kernel/rcu/tree.c:2795 [<ffffffff814c195a>] update_process_times+0x3a/0x70 kernel/time/timer.c:1420 [<ffffffff814eaebf>] tick_sched_handle.isra.20+0xaf/0xe0 kernel/time/tick-sched.c:151 [<ffffffff814eb5e5>] tick_sched_timer+0x75/0x100 kernel/time/tick-sched.c:1086 [< inline >] __run_hrtimer kernel/time/hrtimer.c:1229 [<ffffffff814c3723>] __hrtimer_run_queues+0x363/0xc10 kernel/time/hrtimer.c:1293 [<ffffffff814c5732>] hrtimer_interrupt+0x182/0x430 kernel/time/hrtimer.c:1327 [<ffffffff8124e10f>] local_apic_timer_interrupt+0x6f/0xe0 arch/x86/kernel/apic/apic.c:907 [<ffffffff81251576>] smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:931 [<ffffffff86273dec>] apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:520 [<ffffffff814f99bc>] smp_call_function_many+0x59c/0x720 kernel/smp.c:435 [<ffffffff81291e96>] native_flush_tlb_others+0xd6/0x370 arch/x86/mm/tlb.c:154 [< inline >] flush_tlb_others ./arch/x86/include/asm/paravirt.h:329 [<ffffffff812925fc>] flush_tlb_mm_range+0x10c/0x550 arch/x86/mm/tlb.c:220 [<ffffffff816d3a32>] tlb_flush_mmu_tlbonly+0x1e2/0x3f0 mm/memory.c:242 [< inline >] tlb_flush_mmu mm/memory.c:263 [<ffffffff816d6acb>] tlb_finish_mmu+0x1b/0xa0 mm/memory.c:275 [<ffffffff816ea5ad>] unmap_region+0x22d/0x300 mm/mmap.c:2418 [<ffffffff816f2682>] do_munmap+0x712/0xf60 mm/mmap.c:2612 [<ffffffff816f3e90>] mmap_region+0x1d0/0x11a0 mm/mmap.c:1566 [<ffffffff816f55b3>] do_mmap+0x753/0x980 mm/mmap.c:1402 [< inline >] do_mmap_pgoff include/linux/mm.h:1925 [<ffffffff816aa44f>] vm_mmap_pgoff+0x15f/0x1b0 mm/util.c:328 [< inline >] SYSC_mmap_pgoff mm/mmap.c:1452 [<ffffffff816ef9b8>] SyS_mmap_pgoff+0xc8/0x580 mm/mmap.c:1410 [< inline >] SYSC_mmap arch/x86/kernel/sys_x86_64.c:95 [<ffffffff811afa46>] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:86 [<ffffffff86272ff6>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 rcu_sched kthread starved for 26002 jiffies! g16336 c16335 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x100 rcu_sched W ffff88003dfdfa98 29272 8 2 0x00000000 ffff88003dfdfa98 ffff88003ec16d40 ffff88003dfc6718 00ffed0007bfbf6f ffff88003ec20a70 ffff88003ec20a48 ffff88003ec200d8 ffff88003dfc5f08 ffff88003ec200c0 ffffffff874ddc40 ffff88003dfc5f00 ffff88003dfd8000 Call Trace: [<ffffffff86263a57>] schedule+0x97/0x1c0 kernel/sched/core.c:3311 [<ffffffff8626fbbb>] schedule_timeout+0x36b/0x920 kernel/time/timer.c:1531 [<ffffffff814ae693>] rcu_gp_kthread+0xae3/0x1b70 kernel/rcu/tree.c:2125 [<ffffffff813b2cef>] kthread+0x23f/0x2d0 drivers/block/aoe/aoecmd.c:1303 [<ffffffff862733af>] ret_from_fork+0x3f/0x70 arch/x86/entry/entry_64.S:468 BUG: spinlock lockup suspected on CPU#2, a.out/32321 lock: 0xffff88006928dc18, .magic: dead4ead, .owner: a.out/32313, .owner_cpu: 0 CPU: 2 PID: 32321 Comm: a.out Not tainted 4.4.0+ #242 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 00000000ffffffff ffff8800339879b8 ffffffff82926eed ffff88006928dc18 ffff880063472f80 ffff8800333c4740 ffff8800339879f0 ffffffff81462f0d ffffffff84ebd130 0000000000000000 ffff88006928dc18 ffff88006928dc28 Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff82926eed>] dump_stack+0x6f/0xa2 lib/dump_stack.c:50 [<ffffffff81462f0d>] spin_dump+0x14d/0x280 kernel/locking/spinlock_debug.c:67 [< inline >] __spin_lock_debug kernel/locking/spinlock_debug.c:117 [<ffffffff8146322d>] do_raw_spin_lock+0x15d/0x2b0 kernel/locking/spinlock_debug.c:137 [< inline >] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [<ffffffff862729c7>] _raw_spin_lock_irqsave+0xa7/0xd0 kernel/locking/spinlock.c:159 [<ffffffff84ebd130>] _snd_timer_stop+0xa0/0x450 sound/core/timer.c:499 [<ffffffff84ebd504>] snd_timer_stop+0x24/0x140 sound/core/timer.c:535 [< inline >] snd_timer_user_start sound/core/timer.c:1725 [<ffffffff84ec4224>] snd_timer_user_ioctl+0x684/0x2540 sound/core/timer.c:1818 [< inline >] vfs_ioctl fs/ioctl.c:43 [<ffffffff817cbd3c>] do_vfs_ioctl+0x18c/0xfa0 fs/ioctl.c:674 [< inline >] SYSC_ioctl fs/ioctl.c:689 [<ffffffff817ccbdf>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:680 [<ffffffff86272ff6>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 Sending NMI to all CPUs: NMI backtrace for cpu 0 CPU: 0 PID: 32313 Comm: a.out Not tainted 4.4.0+ #242 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff880063472f80 ti: ffff880064cd8000 task.ti: ffff880064cd8000 RIP: 0010:[<ffffffff8144b9b0>] [<ffffffff8144b9b0>] trace_hardirqs_off_caller+0x80/0x3d0 RSP: 0018:ffff880064cdf918 EFLAGS: 00000002 RAX: 0000000000000004 RBX: ffff880063472f80 RCX: ffff880063472f80 RDX: 0000000000000000 RSI: ffff880063473798 RDI: ffff88006347379c RBP: ffff880064cdf930 R08: 0000000000000001 R09: 0000000000000002 R10: 0000000000000001 R11: 0000000000000001 R12: ffff880063472f80 R13: ffffffff86272b66 R14: 00000000ffffffff R15: ffff88006d717dc0 FS: 00007fcc8e404700(0000) GS:ffff88003ec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00007f274232de78 CR3: 000000006698e000 CR4: 00000000000006f0 Stack: 0000000000000086 ffff88006d717dc0 ffff880033a05c58 ffff880064cdf940 ffffffff8144bd0d ffff880064cdf960 ffffffff86272b66 1ffff1000c99bf30 ffff880033a05c28 ffff880064cdfa08 ffffffff814c2f00 ffff8800324ed998 Call Trace: [<ffffffff8144bd0d>] trace_hardirqs_off+0xd/0x10 kernel/locking/lockdep.c:2657 [< inline >] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:162 [<ffffffff86272b66>] _raw_spin_unlock_irqrestore+0xa6/0xc0 kernel/locking/spinlock.c:191 [< inline >] unlock_hrtimer_base kernel/time/hrtimer.c:813 [<ffffffff814c2f00>] hrtimer_try_to_cancel+0x160/0x4a0 kernel/time/hrtimer.c:1047 [<ffffffff814c3262>] hrtimer_cancel+0x22/0x40 kernel/time/hrtimer.c:1065 [<ffffffff84ec6881>] snd_hrtimer_start+0x81/0x120 sound/core/hrtimer.c:93 [<ffffffff84ec0602>] snd_timer_start1+0x212/0x2b0 sound/core/timer.c:430 [<ffffffff84ec0c71>] snd_timer_start+0x121/0x1d0 sound/core/timer.c:473 [< inline >] snd_timer_user_start sound/core/timer.c:1728 [<ffffffff84ec42c0>] snd_timer_user_ioctl+0x720/0x2540 sound/core/timer.c:1818 [< inline >] vfs_ioctl fs/ioctl.c:43 [<ffffffff817cbd3c>] do_vfs_ioctl+0x18c/0xfa0 fs/ioctl.c:674 [< inline >] SYSC_ioctl fs/ioctl.c:689 [<ffffffff817ccbdf>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:680 [<ffffffff86272ff6>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 Code: 4c 8b 24 25 c0 4e 01 00 49 8d bc 24 1c 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 <83> c0 03 38 d0 7c 08 84 d2 0f 85 bf 02 00 00 41 8b b4 24 1c 08 NMI backtrace for cpu 1 CPU: 1 PID: 32322 Comm: a.out Not tainted 4.4.0+ #242 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff8800355fc740 ti: ffff880034620000 task.ti: ffff880034620000 RIP: 0010:[<ffffffff814f8f27>] [<ffffffff814f8f27>] smp_call_function_single+0x227/0x340 RSP: 0018:ffff880034627878 EFLAGS: 00000297 RAX: ffff8800355fc740 RBX: ffff8800346278f0 RCX: ffff8800355fcf60 RDX: 0000000000000000 RSI: ffff8800355fcf60 RDI: 0000000000000286 RBP: ffff880034627918 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 00000000ffffffff R14: 1ffff100068c4f12 R15: dffffc0000000000 FS: 00007fd5c724e700(0000) GS:ffff88003ed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00007fd5c724de78 CR3: 0000000035627000 CR4: 00000000000006e0 Stack: ffff8800346279e0 ffffffff81291720 0000000200000040 0000000041b58ab3 ffffffff8733ad2f ffffffff814f8d00 ffffffff881ca238 0000000000000000 BUG: spinlock lockup suspected on CPU#3, a.out/32311 lock: 0xffff88006928dc18, .magic: dead4ead, .owner: a.out/32313, .owner_cpu: 0 CPU: 3 PID: 32311 Comm: a.out Not tainted 4.4.0+ #242 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 00000000ffffffff ffff88006d707c60 ffffffff82926eed ffff88006928dc18 ffff880063472f80 ffff8800634717c0 ffff88006d707c98 ffffffff81462f0d ffffffff84ebe3b7 ffffffff00000000 ffff88006928dc18 ffff88006928dc28 Call Trace: <IRQ> [< inline >] __dump_stack lib/dump_stack.c:15 <IRQ> [<ffffffff82926eed>] dump_stack+0x6f/0xa2 lib/dump_stack.c:50 [<ffffffff81462f0d>] spin_dump+0x14d/0x280 kernel/locking/spinlock_debug.c:67 [< inline >] __spin_lock_debug kernel/locking/spinlock_debug.c:117 [<ffffffff8146322d>] do_raw_spin_lock+0x15d/0x2b0 kernel/locking/spinlock_debug.c:137 [< inline >] __raw_spin_lock include/linux/spinlock_api_smp.h:145 [<ffffffff86271f2b>] _raw_spin_lock+0x3b/0x50 kernel/locking/spinlock.c:151 [< inline >] spin_lock include/linux/spinlock.h:302 [<ffffffff84ebe3b7>] snd_timer_interrupt+0x677/0xbf0 sound/core/timer.c:745 [<ffffffff84ec6b26>] snd_hrtimer_callback+0x166/0x230 sound/core/hrtimer.c:54 [< inline >] __run_hrtimer kernel/time/hrtimer.c:1229 [<ffffffff814c3723>] __hrtimer_run_queues+0x363/0xc10 kernel/time/hrtimer.c:1293 [<ffffffff814c5732>] hrtimer_interrupt+0x182/0x430 kernel/time/hrtimer.c:1327 [<ffffffff8124e10f>] local_apic_timer_interrupt+0x6f/0xe0 arch/x86/kernel/apic/apic.c:907 [<ffffffff81251576>] smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:931 [<ffffffff86273dec>] apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:520 [< inline >] spin_unlock_irqrestore include/linux/spinlock.h:362 [<ffffffff84ec0c7f>] snd_timer_start+0x12f/0x1d0 sound/core/timer.c:474 [< inline >] snd_timer_user_start sound/core/timer.c:1728 [<ffffffff84ec42c0>] snd_timer_user_ioctl+0x720/0x2540 sound/core/timer.c:1818 [< inline >] vfs_ioctl fs/ioctl.c:43 [<ffffffff817cbd3c>] do_vfs_ioctl+0x18c/0xfa0 fs/ioctl.c:674 [< inline >] SYSC_ioctl fs/ioctl.c:689 [<ffffffff817ccbdf>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:680 [<ffffffff86272ff6>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 ffffffff81291720 ffff8800346279e0 0000000000000003 fffffbfff1039670 Call Trace: [<ffffffff814f99bc>] smp_call_function_many+0x59c/0x720 kernel/smp.c:435 [<ffffffff81291e96>] native_flush_tlb_others+0xd6/0x370 arch/x86/mm/tlb.c:154 [< inline >] flush_tlb_others ./arch/x86/include/asm/paravirt.h:329 [<ffffffff812925fc>] flush_tlb_mm_range+0x10c/0x550 arch/x86/mm/tlb.c:220 [<ffffffff816d3a32>] tlb_flush_mmu_tlbonly+0x1e2/0x3f0 mm/memory.c:242 [< inline >] tlb_flush_mmu mm/memory.c:263 [<ffffffff816d6acb>] tlb_finish_mmu+0x1b/0xa0 mm/memory.c:275 [<ffffffff816ea5ad>] unmap_region+0x22d/0x300 mm/mmap.c:2418 [<ffffffff816f2682>] do_munmap+0x712/0xf60 mm/mmap.c:2612 [<ffffffff816f3e90>] mmap_region+0x1d0/0x11a0 mm/mmap.c:1566 [<ffffffff816f55b3>] do_mmap+0x753/0x980 mm/mmap.c:1402 [< inline >] do_mmap_pgoff include/linux/mm.h:1925 [<ffffffff816aa44f>] vm_mmap_pgoff+0x15f/0x1b0 mm/util.c:328 [< inline >] SYSC_mmap_pgoff mm/mmap.c:1452 [<ffffffff816ef9b8>] SyS_mmap_pgoff+0xc8/0x580 mm/mmap.c:1410 [< inline >] SYSC_mmap arch/x86/kernel/sys_x86_64.c:95 [<ffffffff811afa46>] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:86 [<ffffffff86272ff6>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 Code: 60 ff ff ff 48 8b 95 68 ff ff ff 48 8d 73 c0 8b bd 74 ff ff ff e8 9a f9 ff ff 41 89 c4 8b 43 d8 a8 01 74 9a e8 1b b3 07 00 f3 90 <8b> 43 d8 a8 01 75 f2 eb 8a e8 0b b3 07 00 48 c7 c7 60 57 56 87 NMI backtrace for cpu 2 CPU: 2 PID: 32321 Comm: a.out Not tainted 4.4.0+ #242 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff8800333c4740 ti: ffff880033980000 task.ti: ffff880033980000 RIP: 0010:[<ffffffff81261bb6>] [<ffffffff81261bb6>] flat_send_IPI_mask+0x156/0x290 RSP: 0018:ffff880033987940 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000 RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300 RBP: ffff880033987968 R08: 0000000000000001 R09: 0000000000000000 R10: fffffbfff10e18f2 R11: 1ffffffff12758b5 R12: 0000000000000086 R13: 000000000f000000 R14: ffffffff87561c60 R15: 0000000000000002 FS: 00007fd5c7a4f700(0000) GS:ffff88006d600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00007f2a48ebde78 CR3: 0000000035627000 CR4: 00000000000006e0 Stack: ffffffff87561c60 ffffffff881ce320 0000000000000040 fffffbfff1039670 ffff88006d71a460 ffff880033987988 ffffffff812576bb ffffffff86603680 dffffc0000000000 ffff8800339879e0 ffffffff82932402 ffffffff82926f05 Call Trace: [<ffffffff812576bb>] nmi_raise_cpu_backtrace+0x5b/0x70 arch/x86/kernel/apic/hw_nmi.c:33 [<ffffffff82932402>] nmi_trigger_all_cpu_backtrace+0x4b2/0x540 lib/nmi_backtrace.c:85 [<ffffffff81257704>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 [< inline >] trigger_all_cpu_backtrace include/linux/nmi.h:41 [< inline >] __spin_lock_debug kernel/locking/spinlock_debug.c:119 [<ffffffff81463237>] do_raw_spin_lock+0x167/0x2b0 kernel/locking/spinlock_debug.c:137 [< inline >] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [<ffffffff862729c7>] _raw_spin_lock_irqsave+0xa7/0xd0 kernel/locking/spinlock.c:159 [<ffffffff84ebd130>] _snd_timer_stop+0xa0/0x450 sound/core/timer.c:499 [<ffffffff84ebd504>] snd_timer_stop+0x24/0x140 sound/core/timer.c:535 [< inline >] snd_timer_user_start sound/core/timer.c:1725 [<ffffffff84ec4224>] snd_timer_user_ioctl+0x684/0x2540 sound/core/timer.c:1818 [< inline >] vfs_ioctl fs/ioctl.c:43 [<ffffffff817cbd3c>] do_vfs_ioctl+0x18c/0xfa0 fs/ioctl.c:674 [< inline >] SYSC_ioctl fs/ioctl.c:689 [<ffffffff817ccbdf>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:680 [<ffffffff86272ff6>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 Code: 00 c3 5f ff 80 e6 10 75 e1 41 c1 e5 18 44 89 2c 25 10 c3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 c3 5f ff <41> f7 c4 00 02 00 00 74 4a e8 fc fd 1e 00 48 c7 c7 68 57 56 87 NMI backtrace for cpu 3 CPU: 3 PID: 32311 Comm: a.out Not tainted 4.4.0+ #242 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff8800634717c0 ti: ffff880065f40000 task.ti: ffff880065f40000 RIP: 0010:[<ffffffff82953fb8>] [<ffffffff82953fb8>] delay_tsc+0x18/0x70 RSP: 0018:ffff88006d707c88 EFLAGS: 00000086 RAX: 0000000071a66e06 RBX: ffff88006928dc18 RCX: 000000000000001e RDX: 0000000000000064 RSI: 0000006471a66dc4 RDI: 0000000000000001 RBP: ffff88006d707c88 R08: 0000000000000003 R09: 0000000000000001 R10: ffff8800634717c0 R11: 0000000000000000 R12: ffff88006928dc28 R13: 000000009a9d2d40 R14: ffff88006928dc20 R15: 000000009a8c7d02 FS: 00007fbb31057700(0000) GS:ffff88006d700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 00007fcc8e403e78 CR3: 0000000032e86000 CR4: 00000000000006e0 Stack: ffff88006d707c98 ffffffff82953f0a ffff88006d707cd0 ffffffff81463219 ffff88006928dc18 ffff8800324ee230 ffffed000d251b90 ffff8800324ee220 ffff8800324ee2b0 ffff88006d707cf0 ffffffff86271f2b ffffffff84ebe3b7 Call Trace: <IRQ> d [<ffffffff82953f0a>] __delay+0xa/0x10 arch/x86/lib/delay.c:153 [< inline >] __spin_lock_debug kernel/locking/spinlock_debug.c:114 [<ffffffff81463219>] do_raw_spin_lock+0x149/0x2b0 kernel/locking/spinlock_debug.c:137 [< inline >] __raw_spin_lock include/linux/spinlock_api_smp.h:145 [<ffffffff86271f2b>] _raw_spin_lock+0x3b/0x50 kernel/locking/spinlock.c:151 [< inline >] spin_lock include/linux/spinlock.h:302 [<ffffffff84ebe3b7>] snd_timer_interrupt+0x677/0xbf0 sound/core/timer.c:745 [<ffffffff84ec6b26>] snd_hrtimer_callback+0x166/0x230 sound/core/hrtimer.c:54 [< inline >] __run_hrtimer kernel/time/hrtimer.c:1229 [<ffffffff814c3723>] __hrtimer_run_queues+0x363/0xc10 kernel/time/hrtimer.c:1293 [<ffffffff814c5732>] hrtimer_interrupt+0x182/0x430 kernel/time/hrtimer.c:1327 [<ffffffff8124e10f>] local_apic_timer_interrupt+0x6f/0xe0 arch/x86/kernel/apic/apic.c:907 [<ffffffff81251576>] smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:931 [<ffffffff86273dec>] apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:520 [< inline >] spin_unlock_irqrestore include/linux/spinlock.h:362 [<ffffffff84ec0c7f>] snd_timer_start+0x12f/0x1d0 sound/core/timer.c:474 [< inline >] snd_timer_user_start sound/core/timer.c:1728 [<ffffffff84ec42c0>] snd_timer_user_ioctl+0x720/0x2540 sound/core/timer.c:1818 [< inline >] vfs_ioctl fs/ioctl.c:43 [<ffffffff817cbd3c>] do_vfs_ioctl+0x18c/0xfa0 fs/ioctl.c:674 [< inline >] SYSC_ioctl fs/ioctl.c:689 [<ffffffff817ccbdf>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:680 [<ffffffff86272ff6>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 Code: 48 8d 7a 01 ff 15 a9 ad f8 04 5d c3 0f 1f 80 00 00 00 00 55 65 ff 05 a8 0e 6c 7d 48 89 e5 65 44 8b 05 6d f1 6b 7d 0f ae e8 0f 31 <48> c1 e2 20 48 89 d6 48 09 c6 0f ae e8 0f 31 48 c1 e2 20 48 09 On commit 67990608c8b95d2b8ccc29932376ae73d5818727 (Jan 12).

1 0

[alsa-devel] Additions to simple-audio-card
by Ricard Wanderlof 13 Jan '16

13 Jan '16

I'm trying to use simple-audio-card in a system with an ADAU1361, as it seems that the basic functionality is what I need without resort to writing a specialized machine driver, however there are a couple of shortcomings related to my particular patch which I want to discuss before venturing off on a tangent: 1. The ADAU1361 needs its PLL set up using snd_soc_dai_ops.set_pll, however simple-audio-card has no support for this. Would it be a good idea to augment simple-audio-card with this? After all, it does set_sysclk. 2. simple-audio-card unconditionally uses clk_prepare_enable to start the CPU DAI and CODEC DAI clocks. In the particular system I have here however, the clock hierarchy is not modelled in DT. I would rather make these calls conditional on the corresponding clk variable, i.e. if no clock has been defined for the DAI in question, no attempt is done to do clk_prepare_enable either. 3. It would be nice if simple-audio-card could support off-codec widgets, e.g. switches that are not built into the codec, via the gpio framework. That is, you could set up ALSA controls which control a feature via gpio. I'm prepared to do the actual work, but it warrants a bit of discussion whether or not these things are a good idea to start with. If too much features are added to simple-audio-card it might not be so simple any more, on the other hand, it would do very nicely as a more and more general device tree based machine driver which is simple to use. /Ricard -- Ricard Wolf Wanderlöf ricardw(at)axis.com Axis Communications AB, Lund, Sweden www.axis.com Phone +46 46 272 2016 Fax +46 46 13 61 30

1 0

[alsa-devel] sound: GPF in snd_timer_user_params
by Dmitry Vyukov 13 Jan '16

13 Jan '16

Hello, The following program triggers GPF in snd_timer_user_params: // autogenerated by syzkaller (http://github.com/google/syzkaller) #include <unistd.h> #include <sys/syscall.h> #include <string.h> #include <stdint.h> #include <pthread.h> long r[108]; void *thr(void *arg) { switch ((long)arg) { case 0: r[0] = syscall(SYS_mmap, 0x20000000ul, 0xf000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); break; case 1: memcpy((void*)0x20000990, "\x2f\x64\x65\x76\x2f\x73\x6e\x64\x2f\x74\x69\x6d\x65\x72", 14); r[2] = syscall(SYS_open, 0x20000990ul, 0x40ul, 0x0ul, 0, 0, 0); break; case 2: r[3] = syscall(SYS_ioctl, r[2], 0x54a0ul, 0, 0, 0, 0); break; case 3: *(uint32_t*)0x20000000 = (uint32_t)0x1; *(uint32_t*)0x20000004 = (uint32_t)0x7; *(uint32_t*)0x20000008 = (uint32_t)0x3; *(uint32_t*)0x2000000c = (uint32_t)0x0; *(uint32_t*)0x20000010 = (uint32_t)0x0; *(uint8_t*)0x20000014 = (uint8_t)0x0; *(uint8_t*)0x20000015 = (uint8_t)0x0; *(uint8_t*)0x20000016 = (uint8_t)0x0; *(uint8_t*)0x20000017 = (uint8_t)0x0; *(uint8_t*)0x20000018 = (uint8_t)0x0; *(uint8_t*)0x20000019 = (uint8_t)0x0; *(uint8_t*)0x2000001a = (uint8_t)0x0; *(uint8_t*)0x2000001b = (uint8_t)0x0; *(uint8_t*)0x2000001c = (uint8_t)0x0; *(uint8_t*)0x2000001d = (uint8_t)0x0; *(uint8_t*)0x2000001e = (uint8_t)0x0; *(uint8_t*)0x2000001f = (uint8_t)0x0; *(uint8_t*)0x20000020 = (uint8_t)0x0; *(uint8_t*)0x20000021 = (uint8_t)0x0; *(uint8_t*)0x20000022 = (uint8_t)0x0; *(uint8_t*)0x20000023 = (uint8_t)0x0; *(uint8_t*)0x20000024 = (uint8_t)0x0; *(uint8_t*)0x20000025 = (uint8_t)0x0; *(uint8_t*)0x20000026 = (uint8_t)0x0; *(uint8_t*)0x20000027 = (uint8_t)0x0; *(uint8_t*)0x20000028 = (uint8_t)0x0; *(uint8_t*)0x20000029 = (uint8_t)0x0; *(uint8_t*)0x2000002a = (uint8_t)0x0; *(uint8_t*)0x2000002b = (uint8_t)0x0; *(uint8_t*)0x2000002c = (uint8_t)0x0; *(uint8_t*)0x2000002d = (uint8_t)0x0; *(uint8_t*)0x2000002e = (uint8_t)0x0; *(uint8_t*)0x2000002f = (uint8_t)0x0; *(uint8_t*)0x20000030 = (uint8_t)0x0; *(uint8_t*)0x20000031 = (uint8_t)0x0; *(uint8_t*)0x20000032 = (uint8_t)0x0; *(uint8_t*)0x20000033 = (uint8_t)0x0; r[41] = syscall(SYS_ioctl, r[2], 0x40345410ul, 0x20000000ul, 0, 0, 0); break; case 4: *(uint32_t*)0x20005731 = (uint32_t)0x5; *(uint32_t*)0x20005735 = (uint32_t)0x7; *(uint32_t*)0x20005739 = (uint32_t)0x0; *(uint32_t*)0x2000573d = (uint32_t)0x0; *(uint32_t*)0x20005741 = (uint32_t)0x5; *(uint8_t*)0x20005745 = (uint8_t)0x0; *(uint8_t*)0x20005746 = (uint8_t)0x0; *(uint8_t*)0x20005747 = (uint8_t)0x0; *(uint8_t*)0x20005748 = (uint8_t)0x0; *(uint8_t*)0x20005749 = (uint8_t)0x0; *(uint8_t*)0x2000574a = (uint8_t)0x0; *(uint8_t*)0x2000574b = (uint8_t)0x0; *(uint8_t*)0x2000574c = (uint8_t)0x0; *(uint8_t*)0x2000574d = (uint8_t)0x0; *(uint8_t*)0x2000574e = (uint8_t)0x0; *(uint8_t*)0x2000574f = (uint8_t)0x0; *(uint8_t*)0x20005750 = (uint8_t)0x0; *(uint8_t*)0x20005751 = (uint8_t)0x0; *(uint8_t*)0x20005752 = (uint8_t)0x0; *(uint8_t*)0x20005753 = (uint8_t)0x0; *(uint8_t*)0x20005754 = (uint8_t)0x0; *(uint8_t*)0x20005755 = (uint8_t)0x0; *(uint8_t*)0x20005756 = (uint8_t)0x0; *(uint8_t*)0x20005757 = (uint8_t)0x0; *(uint8_t*)0x20005758 = (uint8_t)0x0; *(uint8_t*)0x20005759 = (uint8_t)0x0; *(uint8_t*)0x2000575a = (uint8_t)0x0; *(uint8_t*)0x2000575b = (uint8_t)0x0; *(uint8_t*)0x2000575c = (uint8_t)0x0; *(uint8_t*)0x2000575d = (uint8_t)0x0; *(uint8_t*)0x2000575e = (uint8_t)0x0; *(uint8_t*)0x2000575f = (uint8_t)0x0; *(uint8_t*)0x20005760 = (uint8_t)0x0; *(uint8_t*)0x20005761 = (uint8_t)0x0; *(uint8_t*)0x20005762 = (uint8_t)0x0; *(uint8_t*)0x20005763 = (uint8_t)0x0; *(uint8_t*)0x20005764 = (uint8_t)0x0; *(uint8_t*)0x20005765 = (uint8_t)0x0; *(uint8_t*)0x20005766 = (uint8_t)0x0; *(uint8_t*)0x20005767 = (uint8_t)0x0; *(uint8_t*)0x20005768 = (uint8_t)0x0; *(uint8_t*)0x20005769 = (uint8_t)0x0; *(uint8_t*)0x2000576a = (uint8_t)0x0; *(uint8_t*)0x2000576b = (uint8_t)0x0; *(uint8_t*)0x2000576c = (uint8_t)0x0; *(uint8_t*)0x2000576d = (uint8_t)0x0; *(uint8_t*)0x2000576e = (uint8_t)0x0; *(uint8_t*)0x2000576f = (uint8_t)0x0; *(uint8_t*)0x20005770 = (uint8_t)0x0; *(uint8_t*)0x20005771 = (uint8_t)0x0; *(uint8_t*)0x20005772 = (uint8_t)0x0; *(uint8_t*)0x20005773 = (uint8_t)0x0; *(uint8_t*)0x20005774 = (uint8_t)0x0; *(uint8_t*)0x20005775 = (uint8_t)0x0; *(uint8_t*)0x20005776 = (uint8_t)0x0; *(uint8_t*)0x20005777 = (uint8_t)0x0; *(uint8_t*)0x20005778 = (uint8_t)0x0; *(uint8_t*)0x20005779 = (uint8_t)0x0; *(uint8_t*)0x2000577a = (uint8_t)0x0; *(uint8_t*)0x2000577b = (uint8_t)0x0; *(uint8_t*)0x2000577c = (uint8_t)0x0; *(uint8_t*)0x2000577d = (uint8_t)0x0; *(uint8_t*)0x2000577e = (uint8_t)0x0; *(uint8_t*)0x2000577f = (uint8_t)0x0; *(uint8_t*)0x20005780 = (uint8_t)0x0; r[107] = syscall(SYS_ioctl, r[2], 0x40505412ul, 0x20005731ul, 0, 0, 0); break; } return 0; } int main() { long i; pthread_t th[5]; memset(r, -1, sizeof(r)); for (i = 0; i < 5; i++) { pthread_create(&th[i], 0, thr, (void*)i); usleep(10000); } for (i = 0; i < 5; i++) { pthread_create(&th[i], 0, thr, (void*)i); if (i%2==0) usleep(10000); } usleep(100000); return 0; } kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN Modules linked in: CPU: 3 PID: 6811 Comm: syz-executor Not tainted 4.4.0+ #240 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff880033ca97c0 ti: ffff8800337b8000 task.ti: ffff8800337b8000 RIP: 0010:[<ffffffff84ec20fb>] [<ffffffff84ec20fb>] snd_timer_user_params.isra.17+0x5fb/0x9f0 RSP: 0018:ffff8800337bf9a0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88003578c000 RCX: ffff880033ca97c0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88003578c030 RBP: ffff8800337bfad0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff100066f7f39 R13: ffff8800337bfaa8 R14: 0000000000000000 R15: 0000000020005731 FS: 00007fd5971aa700(0000) GS:ffff88006d700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000020000990 CR3: 0000000063509000 CR4: 00000000000006e0 Stack: dffffc0000000000 ffffffff814ef860 ffff8800337bfbc0 ffff88003607c508 ffff8800337bfa28 0000000041b58ab3 ffffffff873dff68 ffffffff84ec1b00 ffffffff00000000 0000000000000000 1ffff100067952f9 ffff880033ca97c0 Call Trace: [<ffffffff84ec51ca>] snd_timer_user_ioctl+0x163a/0x2540 sound/core/timer.c:1813 [< inline >] vfs_ioctl fs/ioctl.c:43 [<ffffffff817cbd3c>] do_vfs_ioctl+0x18c/0xfa0 fs/ioctl.c:674 [< inline >] SYSC_ioctl fs/ioctl.c:689 [<ffffffff817ccbdf>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:680 [<ffffffff86272ff6>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185 Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 60 03 00 00 4c 8b 73 30 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 RIP [<ffffffff84ec20fb>] snd_timer_user_params.isra.17+0x5fb/0x9f0 sound/core/timer.c:1680 RSP <ffff8800337bf9a0> ---[ end trace 34f31d6e8ce26f6b ]--- On commit 67990608c8b95d2b8ccc29932376ae73d5818727 (Jan 12).

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[alsa-devel] Regression in Traktor Audio10 driver (snd-usb-audio) mixer flags
by Owen Williams 13 Jan '16

13 Jan '16

Sometime between kernels 3.13 (ubuntu 14.04) and 3.19 (15.04) there was a regression that caused the mixer elements of the Traktor Audio10 driver to stop responding to changes to True. I have an older machine still running 14.04, and if I open alsamixer I can see and interact with the 8 basic boolean switches: numid=3,iface=MIXER,name='Direct Thru Channel A' ; type=BOOLEAN,access=rw------,values=1 : values=off numid=4,iface=MIXER,name='Direct Thru Channel B' ; type=BOOLEAN,access=rw------,values=1 : values=off numid=5,iface=MIXER,name='Direct Thru Channel C' ; type=BOOLEAN,access=rw------,values=1 : values=off numid=6,iface=MIXER,name='Direct Thru Channel D' ; type=BOOLEAN,access=rw------,values=1 : values=off numid=7,iface=MIXER,name='Phono Input Channel A' ; type=BOOLEAN,access=rw------,values=1 : values=off numid=8,iface=MIXER,name='Phono Input Channel B' ; type=BOOLEAN,access=rw------,values=1 : values=off numid=9,iface=MIXER,name='Phono Input Channel C' ; type=BOOLEAN,access=rw------,values=1 : values=off numid=10,iface=MIXER,name='Phono Input Channel D' ; type=BOOLEAN,access=rw------,values=1 : values=off or I can use amixer: amixer -c T10 cset numid=8 on however on my newer machine, with ubuntu 15.04 and 15.10, I am unable to change the values to true. I am a member of the audio group and I have also tried with sudo, but when I try to set the value on nothing happens: $ amixer -c T10 cset numid=8 on numid=8,iface=MIXER,name='Phono Input Channel B' ; type=BOOLEAN,access=rw------,values=1 : values=off The fun part is, if I connect the card to my mac I can set startup conditions for these flags. I can set them to true, and when I connect to my linux machines the flags start up as true. And then, even on the newer kernel, I can turn them off! But I can't turn them back on again. This sound card is the one I'd like to recommend officially for the Mixxx DJ project so I'd really like to get to the bottom of this issue. thanks, Owen Williams A Lead Developer, Mixxx.org

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