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ALSA: synth: Fix conflicting OSS device registration on AWE32 

When OSS emulation is loaded on ISA SB AWE32 chip, we get now kernel
warnings like:
  WARNING: CPU: 0 PID: 2791 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x51/0x80()
  sysfs: cannot create duplicate filename '/devices/isa/sbawe.0/sound/card0/seq-oss-0-0'

It's because both emux synth and opl3 drivers try to register their
OSS device object with the same static index number 0.  This hasn't
been a big problem until the recent rewrite of device management code
(that exposes sysfs at the same time), but it's been an obvious bug.

This patch works around it just by using a different index number of
emux synth object.  There can be a more elegant way to fix, but it's
enough for now, as this code won't be touched so often, in anyway.

Reported-and-tested-by: Michael Shell <list1@michaelshell.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2015-10-05 16:55:09 +02:00
parent c7e1008048
commit 225db5762d
1 changed files with 2 additions and 1 deletions
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3
sound/synth/emux/emux_oss.c
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@ -69,7 +69,8 @@ snd_emux_init_seq_oss(struct snd_emux *emu)
struct snd_seq_oss_reg *arg; struct snd_seq_oss_reg *arg;
struct snd_seq_device *dev; struct snd_seq_device *dev;
if (snd_seq_device_new(emu->card, 0, SNDRV_SEQ_DEV_ID_OSS, /* using device#1 here for avoiding conflicts with OPL3 */
if (snd_seq_device_new(emu->card, 1, SNDRV_SEQ_DEV_ID_OSS,
sizeof(struct snd_seq_oss_reg), &dev) < 0) sizeof(struct snd_seq_oss_reg), &dev) < 0)
return; return;