From: Takashi Sakamoto Date: Sat, 27 Oct 2018 08:13:31 +0000 (+0900) Subject: ALSA: dice: fix to wait for releases of all ALSA character devices X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=aedef16a63d5d330afde4fcb54e0e73980e4a116;p=linux.git ALSA: dice: fix to wait for releases of all ALSA character devices In a development period for Linux kernel v4.20, drivers in ALSA firewire stack were changed to wait for releases of all ALSA character devices at .remove callback of bus driver. However, ALSA dice driver is partly out of this change. This bug can bring fault to user process which holds the last of character device in unplugging. This commit fixes the driver to wait in the callback. Fixes: 61ccc6f6b27c ('ALSA: firewire: block .remove callback of bus driver till all of ALSA character devices are released') Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- diff --git a/sound/firewire/dice/dice.c b/sound/firewire/dice/dice.c index 0f6dbcffe711d..ed50b222d36ea 100644 --- a/sound/firewire/dice/dice.c +++ b/sound/firewire/dice/dice.c @@ -240,8 +240,8 @@ static void dice_remove(struct fw_unit *unit) cancel_delayed_work_sync(&dice->dwork); if (dice->registered) { - /* No need to wait for releasing card object in this context. */ - snd_card_free_when_closed(dice->card); + // Block till all of ALSA character devices are released. + snd_card_free(dice->card); } mutex_destroy(&dice->mutex);