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| author | Guenter Roeck <guenter.roeck@ericsson.com> | 2011-11-06 20:25:18 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2011-11-06 20:25:18 +0100 |
| commit | bfa02b0da66965caf46e441270af87edda4fea14 (patch) | |
| tree | 374d3bc3993c7027eac330b3184437a27bf2e0a8 /drivers/hwmon/w83627ehf.c | |
| parent | 2aba6cac2a84f3b80e11a680c34d55e7739b474d (diff) | |
| download | lwn-bfa02b0da66965caf46e441270af87edda4fea14.tar.gz lwn-bfa02b0da66965caf46e441270af87edda4fea14.zip | |
hwmon: (w83627ehf) Fix broken driver init
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@gmail.com>
Tested-by: Alexander Beregalov <a.beregalov@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon/w83627ehf.c')
| -rw-r--r-- | 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 483cb268781e..93f5fc7d6059 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; |