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ALSA: au88x0 - Avoid possible Oops at unbinding
author
Takashi Iwai
<tiwai@suse.de>
Fri, 16 Mar 2012 08:54:00 +0000
(09:54 +0100)
committer
Takashi Iwai
<tiwai@suse.de>
Fri, 16 Mar 2012 08:54:00 +0000
(09:54 +0100)
The irq handler must check whether the MPU401 instance is still alive.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/pci/au88x0/au88x0_core.c
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diff --git
a/sound/pci/au88x0/au88x0_core.c
b/sound/pci/au88x0/au88x0_core.c
index
1181c5e
..
525f881
100644
(file)
--- a/
sound/pci/au88x0/au88x0_core.c
+++ b/
sound/pci/au88x0/au88x0_core.c
@@
-2477,7
+2477,7
@@
static irqreturn_t vortex_interrupt(int irq, void *dev_id)
hwread(vortex->mmio, VORTEX_IRQ_STAT);
handled = 1;
}
- if (
source & IRQ_MIDI
) {
+ if (
(source & IRQ_MIDI) && vortex->rmidi
) {
snd_mpu401_uart_interrupt(vortex->irq,
vortex->rmidi->private_data);
handled = 1;