Em Mon, 14 Mar 2016 09:22:37 +0200
Sakari Ailus <sakari.ai...@iki.fi> escreveu:
> Hi Shuah,
>
> On Sat, Mar 12, 2016 at 06:48:09PM -0700, Shuah Khan wrote:
> > Add GFP flags to media_create_pad_link(), media_create_intf_link(),
> > media_devnode_create(), and media_add_link() that could get called
> > in atomic context to allow callers to pass in the right flags for
> > memory allocation.
> >
> > tree-wide driver changes for media_*() GFP flags change:
> > Change drivers to add gfpflags to interffaces, media_create_pad_link(),
> > media_create_intf_link() and media_devnode_create().
> >
> > Signed-off-by: Shuah Khan <shua...@osg.samsung.com>
> > Suggested-by: Mauro Carvalho Chehab <mche...@osg.samsung.com>
>
> What's the use case for calling the above functions in an atomic context?
>
ALSA code seems to do a lot of stuff at atomic context. That's what
happens on my test machine when au0828 gets probed before
snd-usb-audio:
http://pastebin.com/LEX5LD5K
It seems that ALSA USB probe routine (usb_audio_probe) happens in
atomic context.
Regards,
Mauro
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