linux/sound
Clemens Ladisch 57e6dae108 ALSA: usb-audio: do not trust too-big wMaxPacketSize values
The driver used to assume that the streaming endpoint's wMaxPacketSize
value would be an indication of how much data the endpoint expects or
sends, and compute the number of packets per URB using this value.

However, the Focusrite Scarlett 2i4 declares a value of 1024 bytes,
while only about 88 or 44 bytes are be actually used.  This discrepancy
would result in URBs with far too few packets, which would not work
correctly on the EHCI driver.

To get correct URBs, use wMaxPacketSize only as an upper limit on the
packet size.

Reported-by: James Stone <jamesmstone@gmail.com>
Tested-by: James Stone <jamesmstone@gmail.com>
Cc: <stable@vger.kernel.org> # 2.6.35+
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-08-08 11:37:34 +02:00
..
aoa ALSA: snd-aoa: Add a layout entry for PowerBook6,5 2013-05-16 07:19:01 +02:00
arm ALSA: pxa2xx: Fix unlocked snd_pcm_stop() call 2013-07-15 21:25:13 +02:00
atmel ALSA: atmel: Remove redundant platform_set_drvdata() 2013-05-03 11:40:23 +02:00
core ALSA: compress: fix the return value for SNDRV_COMPRESS_VERSION 2013-07-29 13:58:08 +02:00
drivers ALSA: vx_core: off by one in vx_read_status() 2013-06-21 14:32:06 +02:00
firewire IEEE 1394 (FireWire) subsystem changes post v3.10: 2013-07-10 11:02:58 -07:00
i2c ALSA: ak4xx-adda: info leak in ak4xxx_capture_source_info() 2013-06-26 10:35:55 +02:00
isa ALSA: ISA: Remove superfluous *_set_drvdata(NULL) calls 2013-05-29 12:50:28 +02:00
mips ALSA: mips/sgio2audio: Remove redundant platform_set_drvdata() 2013-05-06 10:45:54 +02:00
oss sound: oss/vwsnd: Always define vwsnd_mutex 2013-07-15 12:07:58 +02:00
parisc ALSA: Remove the rest of *_set_drvdata(NULL) calls 2013-05-29 12:50:59 +02:00
pci ALSA: hda - Fix missing fixup for Mac Mini with STAC9221 2013-08-02 08:16:52 +02:00
pcmcia
ppc ALSA: powermac: Remove redundant platform_set_drvdata() 2013-05-23 14:35:58 +02:00
sh ALSA: sh_dac_audio: Remove redundant platform_set_drvdata() 2013-05-23 14:36:45 +02:00
soc Merge remote-tracking branch 'asoc/fix/wm0010' into asoc-linus 2013-07-31 21:07:23 +01:00
sparc ALSA: Remove the rest of *_set_drvdata(NULL) calls 2013-05-29 12:50:59 +02:00
spi ALSA: Remove the rest of *_set_drvdata(NULL) calls 2013-05-29 12:50:59 +02:00
synth
usb ALSA: usb-audio: do not trust too-big wMaxPacketSize values 2013-08-08 11:37:34 +02:00
Kconfig
Makefile
ac97_bus.c
last.c
sound_core.c drivers: avoid format string in dev_set_name 2013-07-03 16:07:41 -07:00
sound_firmware.c sound_firmware: don't bother with filp_close() 2013-04-09 15:16:32 -04:00