diff options
| author | Takashi Iwai <tiwai@suse.de> | 2008-04-22 17:28:11 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2008-04-24 12:00:41 +0200 |
| commit | ebf029da38829ede6b53ac8a5ad45b149064ea16 (patch) | |
| tree | aebf6bddd245a874577fc321978b3f7137e8ac39 /sound/pci/intel8x0m.c | |
| parent | 6b9a9b329640b7e8143df7b2782884ea758650f7 (diff) | |
[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.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/sound/pci/intel8x0m.c b/sound/pci/intel8x0m.c index 15db810d589..faf674e671a 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; } |