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regmap: Fix reversed bounds check in regmap_raw_write() 

commit f00e71091a upstream.

We're supposed to be checking that "val_len" is not too large but
instead we check if it is smaller than the max.

The only function affected would be regmap_i2c_smbus_i2c_write() in
drivers/base/regmap/regmap-i2c.c.  Strangely that function has its own
limit check which returns an error if (count >= I2C_SMBUS_BLOCK_MAX) so
it doesn't look like it has ever been able to do anything except return
an error.

Fixes: c335931ed9 ("regmap: Add raw_write/read checks for max_raw_write/read sizes")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Dan Carpenter 2018-02-08 10:23:44 +03:00 committed by Greg Kroah-Hartman
parent 666d1084c1
commit 3dac1fe271
1 changed files with 1 additions and 1 deletions
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2
drivers/base/regmap/regmap.c
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@ -1739,7 +1739,7 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
return -EINVAL;
if (val_len % map->format.val_bytes)
return -EINVAL;
if (map->max_raw_write && map->max_raw_write > val_len)
if (map->max_raw_write && map->max_raw_write < val_len)
return -E2BIG;
map->lock(map->lock_arg);