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| author | Punit Agrawal <punit.agrawal@arm.com> | 2014-12-09 15:22:01 +0300 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2014-12-10 18:11:00 +0300 |
| commit | a940cb34fed73b2d4809a4575f2981d5927e2c21 (patch) | |
| tree | 79e734bca7507b5e83e781fa48c265cd34cfe847 /include/linux/thermal.h | |
| parent | fcbb1e02ee540e1875137d36259017f91b95c30c (diff) | |
| download | linux-a940cb34fed73b2d4809a4575f2981d5927e2c21.tar.xz | |
thermal: Fix cdev registration with THERMAL_NO_LIMIT on 64bit
The size of unsigned long varies between 32 and 64 bit systems while
the size of phandle arguments is always 32 bits per parameter.
On 64-bit systems, cooling devices registered via of-thermal apis fail
to bind when the min/max cooling state is specified as
THERMAL_NO_LIMIT (-1UL) as there is a mis-match between the value read
from the device tree (32bit) and the pre-processor define (64bit).
As we're unlikely to need cooling states larger than 32 bits, and for
consistency with the size of phandle arguments, explicitly limit
THERMAL_NO_LIMIT to 32 bits.
Reported-by: Hyungwoo Yang <hwoo.yang@gmail.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'include/linux/thermal.h')
| -rw-r--r-- | include/linux/thermal.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/thermal.h b/include/linux/thermal.h index ef90838b36a0..005586fdf82d 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -38,7 +38,7 @@ #define THERMAL_CSTATE_INVALID -1UL /* No upper/lower limit requirement */ -#define THERMAL_NO_LIMIT THERMAL_CSTATE_INVALID +#define THERMAL_NO_LIMIT ((u32)~0) /* Unit conversion macros */ #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732 >= 0) ? \ |