hwmon: (s3c-hwmon) Ignore invalid divider settings
Avoid registering channels that have zero divider settings in them, as this
will only lead to kernel OOPS from divide-by-zero when the sysfs entry is
read.
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/s3c-hwmon.c b/drivers/hwmon/s3c-hwmon.c
index 3a524f2..7183541 100644
--- a/drivers/hwmon/s3c-hwmon.c
+++ b/drivers/hwmon/s3c-hwmon.c
@@ -323,14 +323,21 @@
}
for (i = 0; i < ARRAY_SIZE(pdata->in); i++) {
- if (!pdata->in[i])
+ struct s3c24xx_adc_hwmon_incfg *cfg = pdata->in[i];
+
+ if (!cfg)
continue;
- if (pdata->in[i]->mult >= 0x10000)
+ if (cfg->mult >= 0x10000)
dev_warn(&dev->dev,
"channel %d multiplier too large\n",
i);
+ if (cfg->divider == 0) {
+ dev_err(&dev->dev, "channel %d divider zero\n", i);
+ continue;
+ }
+
ret = s3c_hwmon_create_attr(&dev->dev, pdata->in[i],
&hwmon->attrs[i], i);
if (ret) {