Pawel Moll b531f81b0d ALSA: usb: Fix Processing Unit Descriptor parsers ... Commit 99fc86450c "ALSA: usb-mixer: parse descriptors with structs" introduced a set of useful parsers for descriptors. Unfortunately the parses for the Processing Unit Descriptor came with a very subtle bug... Functions uac_processing_unit_iProcessing() and uac_processing_unit_specific() were indexing the baSourceID array forgetting the fields before the iProcessing and process-specific descriptors. The problem was observed with Sound Blaster Extigy mixer, where nNrModes in Up/Down-mix Processing Unit Descriptor was accessed at offset 10 of the descriptor (value 0) instead of offset 15 (value 7). In result the resulting control had interesting limit values: Simple mixer control 'Channel Routing Mode Select',0 Capabilities: volume volume-joined penum Playback channels: Mono Capture channels: Mono Limits: 0 - -1 Mono: -1 [100%] Fixed by starting from the bmControls, which was calculated correctly, instead of baSourceID. Now the mentioned control is fine: Simple mixer control 'Channel Routing Mode Select',0 Capabilities: volume volume-joined penum Playback channels: Mono Capture channels: Mono Limits: 0 - 6 Mono: 0 [0%] Signed-off-by: Pawel Moll <mail@pawelmoll.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>		2013-02-21 13:55:12 +01:00
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Kbuild	…
audio.h	ALSA: usb: Fix Processing Unit Descriptor parsers	2013-02-21 13:55:12 +01:00
cdc.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2012-11-10 18:32:51 -05:00
ch9.h	usb: Using correct way to clear usb3.0 device's remote wakeup feature.	2013-01-24 09:58:18 -08:00
ch11.h	…
functionfs.h	…
g_printer.h	…
gadgetfs.h	…
midi.h	…
tmc.h	…
video.h	…