At Thu, 18 Dec 2014 02:03:19 +0100, Jiri Jaburek wrote:
The Arcam rPAC seems to have the same problem - whenever anything (alsamixer, udevd, 3.9+ kernel from 60af3d037eb8c, ..) attempts to access mixer / control interface of the card, the firmware "locks up" the entire device, resulting in SNDRV_PCM_IOCTL_HW_PARAMS failed (-5): Input/output error from alsa-lib.
Other operating systems can somehow read the mixer (there seems to be playback volume/mute), but any manipulation is ignored by the device (which has hardware volume controls).
Cc: stable@vger.kernel.org Signed-off-by: Jiri Jaburek jjaburek@redhat.com
Thanks, applied now. But at the next time, please put maintainers to Cc.
Takashi
sound/usb/mixer_maps.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c index 1994d41..b703cb3 100644 --- a/sound/usb/mixer_maps.c +++ b/sound/usb/mixer_maps.c @@ -333,8 +333,11 @@ static struct usbmix_name_map gamecom780_map[] = { {} };
-static const struct usbmix_name_map kef_x300a_map[] = {
- { 10, NULL }, /* firmware locks up (?) when we try to access this FU */
+/* some (all?) SCMS USB3318 devices are affected by a firmware lock up
- when anything attempts to access FU 10 (control)
- */
+static const struct usbmix_name_map scms_usb3318_map[] = {
- { 10, NULL }, { 0 }
};
@@ -434,8 +437,14 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = { .map = ebox44_map, }, {
/* KEF X300A */
.map = kef_x300a_map,
.map = scms_usb3318_map,- },
- {
/* Arcam rPAC */.id = USB_ID(0x25c4, 0x0003),.map = scms_usb3318_map,};
2.1.0
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