ALSA: usb-audio: Reorder snd_djm_devices[] entries
authorGeraldo Nascimento <geraldogabriel@gmail.com>
Sat, 4 Dec 2021 18:52:24 +0000 (15:52 -0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 14 Dec 2021 09:57:16 +0000 (10:57 +0100)
commit069a849819b36b1425f9530207eb3d4745b4b57e
tree7cbdab666182a9e82cbf2b3ff6934d84b1faede3
parentebacb44cb2042b90951140eda806bedad23ef554
ALSA: usb-audio: Reorder snd_djm_devices[] entries

commit fb1af5bea4670c835e42fc0c14c49d3499468774 upstream.

Olivia Mackintosh has posted to alsa-devel reporting that
there's a potential bug that could break mixer quirks for Pioneer
devices introduced by 6d27788160362a7ee6c0d317636fe4b1ddbe59a7
"ALSA: usb-audio: Add support for the Pioneer DJM 750MK2
Mixer/Soundcard".

This happened because the DJM 750 MK2 was added last to the Pioneer DJM
device table index and defined as 0x4 but was added to snd_djm_devices[]
just after the DJM 750 (MK1) entry instead of last, after the DJM 900
NXS2. This escaped review.

To prevent that from ever happening again, Takashi Iwai suggested to use
C99 array designators in snd_djm_devices[] instead of simply reordering
the entries.

Fixes: 6d2778816036 ("ALSA: usb-audio: Add support for the Pioneer DJM 750MK2")
Reported-by: Olivia Mackintosh <livvy@base.nu>
Suggested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Geraldo Nascimento <geraldogabriel@gmail.com>
Link: https://lore.kernel.org/r/Yau46FDzoql0SNnW@geday
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sound/usb/mixer_quirks.c