diff options
| author | Stephen Warren <swarren@nvidia.com> | 2013-05-30 09:59:40 -0600 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-06-01 19:46:16 +0100 |
| commit | eca8960a8e0f48dc62c1063bcc33a626455d766e (patch) | |
| tree | 1ce5946e80204bd51db2e6dae7b9c592079046ad /include/linux | |
| parent | 4dd9572abc224019a042b662fb0eececca283cb9 (diff) | |
spi: fix incorrect handling of min param in SPI_BPW_RANGE_MASK
SPI_BPW_RANGE_MASK is intended to work by calculating two masks; one
representing support for all bits up-to-and-including the "max" supported
value, and one representing support for all bits up-to-but-not-including
the "min" supported value, and then taking the difference between the
two, resulting in a mask representing support for all bits between
(inclusive) the min and max values.
However, the second mask ended up representing all bits up-to-and-
including rather up-to-but-not-including. Fix this bug.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/spi/spi.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 3e9479134d9d..28e440be1c07 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -310,7 +310,7 @@ struct spi_master { u32 bits_per_word_mask; #define SPI_BPW_MASK(bits) BIT((bits) - 1) #define SPI_BIT_MASK(bits) (((bits) == 32) ? ~0UL : (BIT(bits) - 1)) -#define SPI_BPW_RANGE_MASK(min, max) (SPI_BIT_MASK(max) - SPI_BIT_MASK(min)) +#define SPI_BPW_RANGE_MASK(min, max) (SPI_BIT_MASK(max) - SPI_BIT_MASK(min - 1)) /* other constraints relevant to this driver */ u16 flags; |