Commit 2265cef2 (hwmon: (w83627ehf) Properly report PECI and AMD-SI
sensor types) results in kernel panic if data->temp_label was not
initialized.
The problem was found with chip W83627DHG-P.
Add check if data->temp->label was set before use.
Based on incomplete patch by Alexander Beregalov.
Reported-by: Alexander Beregalov <a.beregalov@xxxxxxxxx>
Tested-by: Alexander Beregalov <a.beregalov@xxxxxxxxx>
Cc: Jean Delvare <khali@xxxxxxxxxxxx>
Cc: stable@xxxxxxxxxx
Signed-off-by: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx>
---
drivers/hwmon/w83627ehf.c | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index 483cb26..93f5fc7 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -1835,12 +1835,15 @@ static inline void __devinit w83627ehf_init_device(struct w83627ehf_data *data,
diode = 0x70;
}
for (i = 0; i < 3; i++) {
- const char *label = data->temp_label[data->temp_src[i]];
+ const char *label = NULL;
+
+ if (data->temp_label)
+ label = data->temp_label[data->temp_src[i]];
/* Digital source overrides analog type */
- if (strncmp(label, "PECI", 4) == 0)
+ if (label && strncmp(label, "PECI", 4) == 0)
data->temp_type[i] = 6;
- else if (strncmp(label, "AMD", 3) == 0)
+ else if (label && strncmp(label, "AMD", 3) == 0)
data->temp_type[i] = 5;
else if ((tmp & (0x02 << i)))
data->temp_type[i] = (diode & (0x10 << i)) ? 1 : 3;
--
1.7.3.1
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