lkml.org 
[lkml]   [2016]   [Apr]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 3.4 75/92] ALSA: synth: Fix conflicting OSS device registration on AWE32
    Date
    From: Takashi Iwai <tiwai@suse.de>

    3.4.112-rc1 review patch. If anyone has any objections, please let me know.

    ------------------


    commit 225db5762dc1a35b26850477ffa06e5cd0097243 upstream.

    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>
    Signed-off-by: Takashi Iwai <tiwai@suse.de>
    Signed-off-by: Zefan Li <lizefan@huawei.com>
    ---
    sound/synth/emux/emux_oss.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/sound/synth/emux/emux_oss.c b/sound/synth/emux/emux_oss.c
    index daf61ab..646b667 100644
    --- a/sound/synth/emux/emux_oss.c
    +++ b/sound/synth/emux/emux_oss.c
    @@ -69,7 +69,8 @@ snd_emux_init_seq_oss(struct snd_emux *emu)
    struct snd_seq_oss_reg *arg;
    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)
    return;

    --
    1.9.1
    \
     
     \ /
      Last update: 2016-04-18 13:21    [W:4.250 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site