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>

diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c
index db02c1e96b080c2525b313cc9fae11d2550af731..eefc4563b2f946c440df969d063a403e09c37dc0 100644 (file)
--- 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;
        }