[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>
diff --git a/sound/pci/echoaudio/echoaudio.c b/sound/pci/echoaudio/echoaudio.c
index 90ec090..e16dc92 100644
--- a/sound/pci/echoaudio/echoaudio.c
+++ b/sound/pci/echoaudio/echoaudio.c
@@ -1852,15 +1852,16 @@
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);