diff options
| author | Takashi Iwai <tiwai@suse.de> | 2010-02-12 18:17:06 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-02-12 18:20:04 +0100 |
| commit | d6d8bf549393484e906913f02fa3c9518a2819b6 (patch) | |
| tree | 29c0ecdb65f436e818786d15d55bf4a8c70bb873 /sound | |
| parent | ALSA: hda-intel: Avoid divide by zero crash (diff) | |
| download | linux-d6d8bf549393484e906913f02fa3c9518a2819b6.tar.xz linux-d6d8bf549393484e906913f02fa3c9518a2819b6.zip | |
ALSA: hda - use WARN_ON_ONCE() for zero-division detection
Replace the zero-division warning message with WARN_ON_ONCE() per the
advice by Linus. This shouldn't happen, but if it happens, it's
possible that the bug happens often due to buggy IRQs.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index e767c3f395ab..3600e9cc9bc6 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -1893,12 +1893,9 @@ 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 (WARN_ONCE(!azx_dev->period_bytes, + "hda-intel: zero azx_dev->period_bytes")) + return 0; /* this shouldn't happen! */ 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 */ |