[alsa-devel] [PATCH 1/3] ALSA: usb-audio: Fix endianess in descriptor validation
I overlooked that some fields are words and need the converts from LE in the recently added USB descriptor validation code. This patch fixes those with the proper macro usages.
Fixes: 57f8770620e9 ("ALSA: usb-audio: More validations of descriptor units") Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/usb/validate.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/sound/usb/validate.c b/sound/usb/validate.c index 4034c2072415..6fe206f6e911 100644 --- a/sound/usb/validate.c +++ b/sound/usb/validate.c @@ -110,7 +110,7 @@ static bool validate_processing_unit(const void *p, default: if (v->type == UAC1_EXTENSION_UNIT) return true; /* OK */ - switch (d->wProcessType) { + switch (le16_to_cpu(d->wProcessType)) { case UAC_PROCESS_UP_DOWNMIX: case UAC_PROCESS_DOLBY_PROLOGIC: if (d->bLength < len + 1) /* bNrModes */ @@ -125,7 +125,7 @@ static bool validate_processing_unit(const void *p, case UAC_VERSION_2: if (v->type == UAC2_EXTENSION_UNIT_V2) return true; /* OK */ - switch (d->wProcessType) { + switch (le16_to_cpu(d->wProcessType)) { case UAC2_PROCESS_UP_DOWNMIX: case UAC2_PROCESS_DOLBY_PROLOCIC: /* SiC! */ if (d->bLength < len + 1) /* bNrModes */ @@ -142,7 +142,7 @@ static bool validate_processing_unit(const void *p, len += 2; /* wClusterDescrID */ break; } - switch (d->wProcessType) { + switch (le16_to_cpu(d->wProcessType)) { case UAC3_PROCESS_UP_DOWNMIX: if (d->bLength < len + 1) /* bNrModes */ return false;
The Scarlett gen2 mixer quirk code defines a few record types to communicate via USB hub, and those must be all little-endian. This patch changes the field types to LE to annotate endianess properly. It also fixes the incorrect usage of leXX_to_cpu() in a couple of places, which was caught by sparse after this change.
Fixes: 9e4d5c1be21f ("ALSA: usb-audio: Scarlett Gen 2 mixer interface") Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/usb/mixer_scarlett_gen2.c | 46 ++++++++++++++++++++--------------------- 1 file changed, 23 insertions(+), 23 deletions(-)
diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c index 94b903d95afa..74c00c905d24 100644 --- a/sound/usb/mixer_scarlett_gen2.c +++ b/sound/usb/mixer_scarlett_gen2.c @@ -558,11 +558,11 @@ static const struct scarlett2_config
/* proprietary request/response format */ struct scarlett2_usb_packet { - u32 cmd; - u16 size; - u16 seq; - u32 error; - u32 pad; + __le32 cmd; + __le16 size; + __le16 seq; + __le32 error; + __le32 pad; u8 data[]; };
@@ -664,11 +664,11 @@ static int scarlett2_usb( "Scarlett Gen 2 USB invalid response; " "cmd tx/rx %d/%d seq %d/%d size %d/%d " "error %d pad %d\n", - le16_to_cpu(req->cmd), le16_to_cpu(resp->cmd), + le32_to_cpu(req->cmd), le32_to_cpu(resp->cmd), le16_to_cpu(req->seq), le16_to_cpu(resp->seq), resp_size, le16_to_cpu(resp->size), - le16_to_cpu(resp->error), - le16_to_cpu(resp->pad)); + le32_to_cpu(resp->error), + le32_to_cpu(resp->pad)); err = -EINVAL; goto unlock; } @@ -687,7 +687,7 @@ static int scarlett2_usb( /* Send SCARLETT2_USB_DATA_CMD SCARLETT2_USB_CONFIG_SAVE */ static void scarlett2_config_save(struct usb_mixer_interface *mixer) { - u32 req = cpu_to_le32(SCARLETT2_USB_CONFIG_SAVE); + __le32 req = cpu_to_le32(SCARLETT2_USB_CONFIG_SAVE);
scarlett2_usb(mixer, SCARLETT2_USB_DATA_CMD, &req, sizeof(u32), @@ -713,11 +713,11 @@ static int scarlett2_usb_set_config( const struct scarlett2_config config_item = scarlett2_config_items[config_item_num]; struct { - u32 offset; - u32 bytes; - s32 value; + __le32 offset; + __le32 bytes; + __le32 value; } __packed req; - u32 req2; + __le32 req2; int err; struct scarlett2_mixer_data *private = mixer->private_data;
@@ -753,8 +753,8 @@ static int scarlett2_usb_get( int offset, void *buf, int size) { struct { - u32 offset; - u32 size; + __le32 offset; + __le32 size; } __packed req;
req.offset = cpu_to_le32(offset); @@ -794,8 +794,8 @@ static int scarlett2_usb_set_mix(struct usb_mixer_interface *mixer, const struct scarlett2_device_info *info = private->info;
struct { - u16 mix_num; - u16 data[SCARLETT2_INPUT_MIX_MAX]; + __le16 mix_num; + __le16 data[SCARLETT2_INPUT_MIX_MAX]; } __packed req;
int i, j; @@ -850,9 +850,9 @@ static int scarlett2_usb_set_mux(struct usb_mixer_interface *mixer) };
struct { - u16 pad; - u16 num; - u32 data[SCARLETT2_MUX_MAX]; + __le16 pad; + __le16 num; + __le32 data[SCARLETT2_MUX_MAX]; } __packed req;
req.pad = 0; @@ -911,9 +911,9 @@ static int scarlett2_usb_get_meter_levels(struct usb_mixer_interface *mixer, u16 *levels) { struct { - u16 pad; - u16 num_meters; - u32 magic; + __le16 pad; + __le16 num_meters; + __le32 magic; } __packed req; u32 resp[SCARLETT2_NUM_METERS]; int i, err;
The loop termination for iterating over all formats should contain SNDRV_PCM_FORMAT_LAST, not less than it.
Fixes: 9b151fec139d ("ALSA: dummy - Add debug proc file") Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/drivers/dummy.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c index da0bd8960b3c..02ac3f4e0c02 100644 --- a/sound/drivers/dummy.c +++ b/sound/drivers/dummy.c @@ -903,7 +903,7 @@ static void print_formats(struct snd_dummy *dummy, { int i;
- for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) { + for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) { if (dummy->pcm_hw.formats & (1ULL << i)) snd_iprintf(buffer, " %s", snd_pcm_format_name(i)); }
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Takashi Iwai