Hi Takashi,
some oopses here running -rt kernels vanished after applying this.
Karsten
-------------------------------------------------------------------
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 <fzu@xxxxxxxxxxxxxxxxxxxxx>
--- /alsa-kernel/core/hwdep.c_ 2007-01-30 20:32:01.000000000 +0100
+++ /alsa-kernel/core/hwdep.c 2007-01-30 20:32:01.000000000 +0100
@@ -156,15 +156,16 @@
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;
}
-------------------------------------------------------------------------
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