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authorColin Ian King <colin.king@canonical.com>2018-09-06 11:41:52 +0100
committerMark Brown <broonie@kernel.org>2018-09-06 12:07:39 +0100
commit9ab708aef61f5620113269a9d1bdb1543d1207d0 (patch)
treeb281c5a2c65e29a2d4dddddc65745a7928229029 /sound/soc/codecs/sgtl5000.c
parentdabdbe3ae0cb9a67872fa4ac80ffdef61391f645 (diff)
ASoC: sgtl5000: avoid division by zero if lo_vag is zero
In the case where lo_vag <= SGTL5000_LINE_OUT_GND_BASE, lo_vag is set to zero and later vol_quot is computed by dividing by lo_vag causing a division by zero error. Fix this by avoiding a zero division and set vol_quot to zero in this specific case so that the lowest setting for i is correctly set. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/sgtl5000.c')
-rw-r--r--sound/soc/codecs/sgtl5000.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
index 60764f6201b1..add18d6d77da 100644
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -1218,7 +1218,7 @@ static int sgtl5000_set_power_regs(struct snd_soc_component *component)
* Searching for a suitable index solving this formula:
* idx = 40 * log10(vag_val / lo_cagcntrl) + 15
*/
- vol_quot = (vag * 100) / lo_vag;
+ vol_quot = lo_vag ? (vag * 100) / lo_vag : 0;
lo_vol = 0;
for (i = 0; i < ARRAY_SIZE(vol_quot_table); i++) {
if (vol_quot >= vol_quot_table[i])