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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/trident/trident_main.c
parent[ALSA] soc - neo1973_wm8753 - Fix module unload (diff)
downloadlinux-ebf029da38829ede6b53ac8a5ad45b149064ea16.tar.xz
linux-ebf029da38829ede6b53ac8a5ad45b149064ea16.zip
[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/trident/trident_main.c')
-rw-r--r--sound/pci/trident/trident_main.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/pci/trident/trident_main.c b/sound/pci/trident/trident_main.c
index 71138ff9b310..bbcee2c09ae4 100644
--- a/sound/pci/trident/trident_main.c
+++ b/sound/pci/trident/trident_main.c
@@ -3676,6 +3676,8 @@ static int snd_trident_free(struct snd_trident *trident)
else if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
outl(0, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
}
+ if (trident->irq >= 0)
+ free_irq(trident->irq, trident);
if (trident->tlb.buffer.area) {
outl(0, TRID_REG(trident, NX_TLBC));
if (trident->tlb.memhdr)
@@ -3685,8 +3687,6 @@ static int snd_trident_free(struct snd_trident *trident)
vfree(trident->tlb.shadow_entries);
snd_dma_free_pages(&trident->tlb.buffer);
}
- if (trident->irq >= 0)
- free_irq(trident->irq, trident);
pci_release_regions(trident->pci);
pci_disable_device(trident->pci);
kfree(trident);