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| author | Axel Lin <axel.lin@ingics.com> | 2014-07-31 22:27:04 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-05 16:28:35 -0700 |
| commit | 5fafb69d9854a1b38ff0fe1b0058544b94702871 (patch) | |
| tree | 63a050bc1e83025435030724b0d8875e0b054c3e /drivers/hwmon | |
| parent | 61d2b2bea78efae53eee7d47c20a0637a1099c26 (diff) | |
| download | lwn-5fafb69d9854a1b38ff0fe1b0058544b94702871.tar.gz lwn-5fafb69d9854a1b38ff0fe1b0058544b94702871.zip | |
hwmon: (sis5595) Prevent overflow problem when writing large limits
commit cc336546ddca8c22de83720632431c16a5f9fe9a upstream.
On platforms with sizeof(int) < sizeof(long), writing a temperature
limit larger than MAXINT will result in unpredictable limit values
written to the chip. Avoid auto-conversion from long to int to fix
the problem.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/sis5595.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hwmon/sis5595.c b/drivers/hwmon/sis5595.c index 72a889702f0d..9ec7d2e2542c 100644 --- a/drivers/hwmon/sis5595.c +++ b/drivers/hwmon/sis5595.c @@ -159,7 +159,7 @@ static inline int TEMP_FROM_REG(s8 val) { return val * 830 + 52120; } -static inline s8 TEMP_TO_REG(int val) +static inline s8 TEMP_TO_REG(long val) { int nval = clamp_val(val, -54120, 157530) ; return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830; |