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ALSA: hda/ca0132 - Avoid division by zero in dspxfr_one_seg()

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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>
This commit is contained in:
Xi Wang 2013-03-07 00:13:51 -05:00 committed by Takashi Iwai
parent 4c7a548a70
commit 3bc085a12d
1 changed files with 6 additions and 2 deletions
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8
sound/pci/hda/patch_ca0132.c
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@ -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;
}