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authorKarsten Wiese <fzu@wemgehoertderstaat.de>2006-10-06 16:08:27 +0200
committerJaroslav Kysela <perex@suse.cz>2006-10-06 20:23:04 +0200
commita9edfc60227a1dc5c741666ff252a6055b73b184 (patch)
tree15993e126624ec9e05f33f957ee4f69bd4787220 /include/sound/asequencer.h
parent4130d59b1ac6e32c130bd59dbce5eb30fede0197 (diff)
downloadlinux-a9edfc60227a1dc5c741666ff252a6055b73b184.tar.bz2
[ALSA] Handle file operations during snd_card disconnects using static file->f_op
Alsa used to kmalloc one file->f_op per file per disconnecting snd_card. This led to oopses sometimes when file->f_op was freed before __fput() finished. Patch adds a virtual device for disconnect: VDD. VDD consists of: LIST_HEAD(shutdown_files) protected by DEFINE_SPINLOCK(shutdown_mutex) static struct file_operations snd_shutdown_f_ops and functions assigned to it Additions to struct snd_monitor_file to specify if instance is hidden by VDD or not. A VDD's instance is created in snd_card_disconnect() under the card->files_lock. cleaned up in snd_card_file_remove() under the card->files_lock. Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'include/sound/asequencer.h')
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