linux/sound
Takashi Iwai 8d879be882 ALSA: pcm: Bail out when chmap is already present
When snd_pcm_add_chmap_ctls() is called to the PCM stream to which a
chmap has been already assigned, it returns as an error due to the
conflicting snd_ctl_add() result.  However, this also clears the
already assigned chmap_kctl field via pcm_chmap_ctl_private_free(),
and becomes inconsistent in the later operation.

This patch adds the check of the conflicting chmap kctl before
actually trying to allocate / assign.  The check failure is treated as
a kernel warning, as the double call of snd_pcm_add_chmap_ctls() is
basically a driver bug and having the stack trace would help
developers to figure out the bad code path.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-05-10 17:05:16 +02:00
..
aoa
arm dma, mm/pat: Rename dma_*_writecombine() to dma_*_wc() 2016-03-09 14:57:51 +01:00
atmel
core ALSA: pcm: Bail out when chmap is already present 2016-05-10 17:05:16 +02:00
drivers Merge branch 'akpm' (patches from Andrew) 2016-03-18 19:26:54 -07:00
firewire ALSA: firewire-lib: enable the same feature as CIP_SKIP_INIT_DBC_CHECK flag 2016-05-10 17:04:01 +02:00
hda Merge branch 'for-linus' into for-next 2016-05-10 16:06:04 +02:00
i2c ALSA: i2c: constify snd_i2c_ops structures 2015-11-30 11:40:08 +01:00
isa ALSA: isa/wavefront: prevent some out of bound writes 2016-05-08 11:39:44 +02:00
mips ALSA: Remove deprecated AU1X00 AC97 driver 2016-02-08 08:17:15 +01:00
oss sound/oss: remove VIRT_TO_BUS dependency 2015-12-09 14:40:51 +01:00
parisc
pci Merge branch 'for-linus' into for-next 2016-05-10 16:06:04 +02:00
pcmcia
ppc PCI: Remove includes of asm/pci-bridge.h 2016-02-05 16:29:28 -06:00
sh
soc Merge remote-tracking branches 'asoc/fix/rt5640' and 'asoc/fix/wm8962' into asoc-linus 2016-04-26 19:25:18 +01:00
sparc ALSA: Add missing dependency on CONFIG_SND_TIMER 2016-01-27 07:10:38 +01:00
spi ALSA: at73c213: manage SSC clock 2016-01-20 09:59:27 +01:00
synth ALSA: emux: constify nrpn_conv_table structures 2016-01-06 10:19:49 +01:00
usb Merge branch 'for-linus' into for-next 2016-05-10 16:06:04 +02:00
ac97_bus.c
Kconfig
last.c
Makefile
sound_core.c sound: fix check for error condition of register_chrdev() 2015-11-07 11:14:30 +01:00
sound_firmware.c