From 8fa58af7db56077d6a042fd7b9dd4c9515e1c37b Mon Sep 17 00:00:00 2001 From: Karsten Wiese Date: Wed, 31 Jan 2007 10:05:30 +0100 Subject: [PATCH] [ALSA] snd_hwdep_release() racefix snd_card_file_remove() can free the snd_card. Touch hw->* only before calling snd_card_file_remove(). Unrelated: Allow hwdep devices not to have own ops.release(); Signed-off-by: Karsten Wiese Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- sound/core/hwdep.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c index a6a6ad0..39c03f3 100644 --- a/sound/core/hwdep.c +++ b/sound/core/hwdep.c @@ -156,15 +156,16 @@ static int snd_hwdep_release(struct inode *inode, struct file * file) int err = -ENXIO; struct snd_hwdep *hw = file->private_data; struct module *mod = hw->card->module; + mutex_lock(&hw->open_mutex); - if (hw->ops.release) { + if (hw->ops.release) err = hw->ops.release(hw, file); - wake_up(&hw->open_wait); - } if (hw->used > 0) hw->used--; - snd_card_file_remove(hw->card, file); mutex_unlock(&hw->open_mutex); + wake_up(&hw->open_wait); + + snd_card_file_remove(hw->card, file); module_put(mod); return err; } -- 2.7.4