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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/echoaudio
parent6b9a9b329640b7e8143df7b2782884ea758650f7 (diff)
downloadlinux-ebf029da38829ede6b53ac8a5ad45b149064ea16.tar.bz2
[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/echoaudio')
-rw-r--r--sound/pci/echoaudio/echoaudio.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/sound/pci/echoaudio/echoaudio.c b/sound/pci/echoaudio/echoaudio.c
index 90ec090792ba..e16dc92e82fb 100644
--- a/sound/pci/echoaudio/echoaudio.c
+++ b/sound/pci/echoaudio/echoaudio.c
@@ -1852,15 +1852,16 @@ static irqreturn_t snd_echo_interrupt(int irq, void *dev_id)
static int snd_echo_free(struct echoaudio *chip)
{
DE_INIT(("Stop DSP...\n"));
- if (chip->comm_page) {
+ if (chip->comm_page)
rest_in_peace(chip);
- snd_dma_free_pages(&chip->commpage_dma_buf);
- }
DE_INIT(("Stopped.\n"));
if (chip->irq >= 0)
free_irq(chip->irq, chip);
+ if (chip->comm_page)
+ snd_dma_free_pages(&chip->commpage_dma_buf);
+
if (chip->dsp_registers)
iounmap(chip->dsp_registers);