[ALSA] intel8x0 - Fix Oops in crash kernel
When intel8x0 driver is loaded in the crash kernel, it gets Oops
occasionally. This is because the irq handler gets called before
the proper hardware initialization. Now defer it after
snd_intel8x0_chip_init().
(reference: http://lkml.org/lkml/2007/3/5/252)
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index 7cf2dcb..202f720 100644
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -2493,6 +2493,7 @@
return -EIO;
}
pci_set_master(pci);
+ snd_intel8x0_chip_init(chip, 0);
if (request_irq(pci->irq, snd_intel8x0_interrupt,
IRQF_SHARED, card->shortname, chip)) {
printk(KERN_ERR "intel8x0: unable to grab IRQ %d, "
@@ -2502,7 +2503,6 @@
}
chip->irq = pci->irq;
synchronize_irq(chip->irq);
- snd_intel8x0_chip_init(chip, 0);
/* re-initialize mixer stuff */
if (chip->device_type == DEVICE_INTEL_ICH4 && !spdif_aclink) {
@@ -2862,16 +2862,7 @@
ICH_REG_ALI_INTERRUPTSR : ICH_REG_GLOB_STA;
chip->int_sta_mask = int_sta_masks;
- /* request irq after initializaing int_sta_mask, etc */
- if (request_irq(pci->irq, snd_intel8x0_interrupt,
- IRQF_SHARED, card->shortname, chip)) {
- snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
- snd_intel8x0_free(chip);
- return -EBUSY;
- }
- chip->irq = pci->irq;
pci_set_master(pci);
- synchronize_irq(chip->irq);
switch(chip->device_type) {
case DEVICE_INTEL_ICH4:
@@ -2901,6 +2892,15 @@
return err;
}
+ /* request irq after initializaing int_sta_mask, etc */
+ if (request_irq(pci->irq, snd_intel8x0_interrupt,
+ IRQF_SHARED, card->shortname, chip)) {
+ snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
+ snd_intel8x0_free(chip);
+ return -EBUSY;
+ }
+ chip->irq = pci->irq;
+
if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
snd_intel8x0_free(chip);
return err;