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Date: Thu, 20 Aug 2015 12:00:06 +0200 From: Markus Pargmann <mpa@...gutronix.de> To: Mark Brown <broonie@...nel.org> Cc: Wolfram Sang <wsa@...-dreams.de>, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, kernel@...gutronix.de, Irina Tirdea <irina.tirdea@...el.com>, Markus Pargmann <mpa@...gutronix.de> Subject: [PATCH v2 3/4] 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 <mpa@...gutronix.de> --- drivers/base/regmap/regmap.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 99f5f1165b60..77c9f235bf3d 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1581,6 +1581,8 @@ 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); @@ -2251,6 +2253,10 @@ 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); -- 2.4.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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