From: Markus Pargmann Date: Sun, 30 Aug 2015 07:33:55 +0000 (+0200) Subject: regmap: Add raw_write/read checks for max_raw_write/read sizes X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c335931ed9d2;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git regmap: Add raw_write/read checks for max_raw_write/read sizes Check in regmap_raw_read() and regmap_raw_write() for correct maximum sizes of the operations. Return -E2BIG if this size is not supported because it is too big. Also this patch causes an uninitialized variable warning so it initializes ret (although not necessary). Signed-off-by: Markus Pargmann Signed-off-by: Mark Brown --- diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 47210101e308..d2efa4b33294 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1584,6 +1584,8 @@ 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) + return -E2BIG; map->lock(map->lock_arg); @@ -2256,6 +2258,10 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, ret = -ENOTSUPP; goto out; } + if (map->max_raw_read && map->max_raw_read < val_len) { + ret = -E2BIG; + goto out; + } /* Physical block read if there's no cache involved */ ret = _regmap_raw_read(map, reg, val, val_len);