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authorTakashi Iwai <tiwai@suse.de>2008-04-22 17:28:11 +0200
committerTakashi Iwai <tiwai@suse.de>2008-04-24 12:00:41 +0200
commitebf029da38829ede6b53ac8a5ad45b149064ea16 (patch)
treeaebf6bddd245a874577fc321978b3f7137e8ac39 /sound/pci/intel8x0m.c
parent6b9a9b329640b7e8143df7b2782884ea758650f7 (diff)
downloadop-kernel-dev-ebf029da38829ede6b53ac8a5ad45b149064ea16.zip
op-kernel-dev-ebf029da38829ede6b53ac8a5ad45b149064ea16.tar.gz
[ALSA] Fix possible races at free_irq in PCI drivers
The irq handler of PCI drivers must be released before releasing other resources since the handler for a shared irq can be still called and may access the freed resource again. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/intel8x0m.c')
-rw-r--r--sound/pci/intel8x0m.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/sound/pci/intel8x0m.c b/sound/pci/intel8x0m.c
index 15db810..faf674e 100644
--- a/sound/pci/intel8x0m.c
+++ b/sound/pci/intel8x0m.c
@@ -985,18 +985,15 @@ static int snd_intel8x0_free(struct intel8x0m *chip)
/* reset channels */
for (i = 0; i < chip->bdbars_count; i++)
iputbyte(chip, ICH_REG_OFF_CR + chip->ichd[i].reg_offset, ICH_RESETREGS);
- /* --- */
+ __hw_end:
if (chip->irq >= 0)
- synchronize_irq(chip->irq);
- __hw_end:
+ free_irq(chip->irq, chip);
if (chip->bdbars.area)
snd_dma_free_pages(&chip->bdbars);
if (chip->addr)
pci_iounmap(chip->pci, chip->addr);
if (chip->bmaddr)
pci_iounmap(chip->pci, chip->bmaddr);
- if (chip->irq >= 0)
- free_irq(chip->irq, chip);
pci_release_regions(chip->pci);
pci_disable_device(chip->pci);
kfree(chip);
@@ -1018,7 +1015,6 @@ static int intel8x0m_suspend(struct pci_dev *pci, pm_message_t state)
snd_pcm_suspend_all(chip->pcm[i]);
snd_ac97_suspend(chip->ac97);
if (chip->irq >= 0) {
- synchronize_irq(chip->irq);
free_irq(chip->irq, chip);
chip->irq = -1;
}
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