Commit cef1ed9c authored Jul 05, 2015 by Nicolas Iooss Committed by Brian Norris Jul 20, 2015

mtd: r852: make ecc_reg 32-bit in r852_ecc_correct



r852_ecc_correct() reads a 32-bit register into a 16-bit variable,
ecc_reg, but this variable is later used as if it was larger.  This is
reported by clang when building the kernel with many warnings:

    drivers/mtd/nand/r852.c:512:11: error: shift count >= width of type
    [-Werror,-Wshift-count-overflow]
                    ecc_reg >>= 16;
                            ^   ~~
Fix this by making ecc_reg 32-bit, like the return type of
r852_read_reg_dword().

Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

parent a11244c0

drivers/mtd/nand/r852.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -466,7 +466,7 @@ static int r852_ecc_calculate(struct mtd_info mtd, const uint8_t dat,
		static int r852_ecc_correct(struct mtd_info mtd, uint8_t dat,
		uint8_t read_ecc, uint8_t calc_ecc)
		{
		uint16_t ecc_reg;
		uint32_t ecc_reg;
		uint8_t ecc_status, err_byte;
		int i, error = 0;