Hi all,
The included patch can be applied to the new usb gadget audio driver
introduced in patch-2.6.31-rc4.
It addresses a seg-fault in uncovered in g_audio.ko.
The fault occurs in the function u_audio.c::gaudio_open_end_dev() when
device /dev/snd/pcmC0D0c (FILE_PCM_CAPTURE) is not present.
I suspect there may be similar problems with device /dev/snd/pcmC0D0p
(FILE_PCM_PLAYBACK) handling also.
I leave that for the developer(s), as I was unsure as to the side-effects of
not calling playback_default_hw_params() in the initialization phase.
- Robin Callender -
======================================================
diff -r linux-2.6.30.4.orig/drivers/usb/gadget/u_audio.c
linux-2.6.30.4/drivers/usb/gadget/u_audio.c
256c256,261
< snd->filp = NULL;
---
snd->substream = NULL;
snd->card = NULL;
} else {
pcm_file = snd->filp->private_data;
snd->substream = pcm_file->substream;
snd->card = card;
258,260d262
< pcm_file = snd->filp->private_data;
< snd->substream = pcm_file->substream;
< snd->card = card;
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