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| author | Xi Wang <xi.wang@gmail.com> | 2013-03-07 00:13:51 -0500 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-03-07 09:18:00 +0100 |
| commit | 3bc085a12d8f9f3e45a4ac0cc24a34abd5b20657 (patch) | |
| tree | e4957c34b8cd36f94326724fa777e6b633f5e832 /sound | |
| parent | 4c7a548a70a44269266858f65c3b5fc9c3ace057 (diff) | |
| download | lwn-3bc085a12d8f9f3e45a4ac0cc24a34abd5b20657.tar.gz lwn-3bc085a12d8f9f3e45a4ac0cc24a34abd5b20657.zip | |
ALSA: hda/ca0132 - Avoid division by zero in dspxfr_one_seg()
Move the zero check `hda_frame_size_words == 0' before the modulus
`buffer_size_words % hda_frame_size_words'.
Also remove the redundant null check `buffer_addx == NULL'.
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/patch_ca0132.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c index db02c1e96b08..eefc4563b2f9 100644 --- a/sound/pci/hda/patch_ca0132.c +++ b/sound/pci/hda/patch_ca0132.c @@ -2298,6 +2298,11 @@ static int dspxfr_one_seg(struct hda_codec *codec, hda_frame_size_words = ((sample_rate_div == 0) ? 0 : (num_chans * sample_rate_mul / sample_rate_div)); + if (hda_frame_size_words == 0) { + snd_printdd(KERN_ERR "frmsz zero\n"); + return -EINVAL; + } + buffer_size_words = min(buffer_size_words, (unsigned int)(UC_RANGE(chip_addx, 1) ? 65536 : 32768)); @@ -2308,8 +2313,7 @@ static int dspxfr_one_seg(struct hda_codec *codec, chip_addx, hda_frame_size_words, num_chans, sample_rate_mul, sample_rate_div, buffer_size_words); - if ((buffer_addx == NULL) || (hda_frame_size_words == 0) || - (buffer_size_words < hda_frame_size_words)) { + if (buffer_size_words < hda_frame_size_words) { snd_printdd(KERN_ERR "dspxfr_one_seg:failed\n"); return -EINVAL; } |