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Merge branch 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 

* 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: hda-intel: Avoid divide by zero crash
This commit is contained in:
Linus Torvalds 2010-02-12 08:48:47 -08:00
parent 280c96b16a fed08d036f
commit 0e9695d9a4
1 changed files with 6 additions and 0 deletions
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6
sound/pci/hda/hda_intel.c
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@ -1893,6 +1893,12 @@ static int azx_position_ok(struct azx *chip, struct azx_dev *azx_dev)
if (!bdl_pos_adj[chip->dev_index])
return 1; /* no delayed ack */
if (azx_dev->period_bytes == 0) {
printk(KERN_WARNING
"hda-intel: Divide by zero was avoided "
"in azx_dev->period_bytes.\n");
return 0;
}
if (pos % azx_dev->period_bytes > azx_dev->period_bytes / 2)
return 0; /* NG - it's below the period boundary */
return 1; /* OK, it's fine */