ALSA: pcm: Don't treat NULL chmap as a fatal error

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commit 2deaeaf102 upstream.

The standard PCM chmap helper callbacks treat the NULL info->chmap as
a fatal error and spews the kernel warning with stack trace when
CONFIG_SND_DEBUG is on.  This was OK, originally it was supposed to be
always static and non-NULL.  But, as the recent addition of Intel LPE
audio driver shows, the chmap content may vary dynamically, and it can
be even NULL when disconnected.  The user still sees the kernel
warning unnecessarily.

For clearing such a confusion, this patch simply removes the
snd_BUG_ON() in each place, just returns an error without warning.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Takashi Iwai 2017-06-14 16:20:32 +02:00 • committed by Greg Kroah-Hartman

parent 8c9c55a0f5

commit 552a14a572

1 changed files with 2 additions and 2 deletions

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sound/core/pcm_lib.c

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