Commit 3716b55b authored by Clark Wang's avatar Clark Wang Committed by sanglipeng
Browse files

i2c: imx-lpi2c: fix type char overflow issue when calculating the clock cycle 

stable inclusion
from stable-v5.10.186
commit 42997367cb67f3e361dd1d6bc08ee07e21457dbc
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8J4KH

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=42997367cb67f3e361dd1d6bc08ee07e21457dbc



--------------------------------

[ Upstream commit e69b9bc1 ]

Claim clkhi and clklo as integer type to avoid possible calculation
errors caused by data overflow.

Fixes: a55fa9d0 ("i2c: imx-lpi2c: add low power i2c bus driver")
Signed-off-by: default avatarClark Wang <xiaoning.wang@nxp.com>
Signed-off-by: default avatarCarlos Song <carlos.song@nxp.com>
Reviewed-by: default avatarAndi Shyti <andi.shyti@kernel.org>
Signed-off-by: default avatarWolfram Sang <wsa@kernel.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarsanglipeng <sanglipeng1@jd.com>
parent 956cb4f4

drivers/i2c/busses/i2c-imx-lpi2c.c

+2 −2
Original line number Diff line number Diff line
@@ -200,8 +200,8 @@ static void lpi2c_imx_stop(struct lpi2c_imx_struct *lpi2c_imx) 
/* CLKLO = I2C_CLK_RATIO * CLKHI, SETHOLD = CLKHI, DATAVD = CLKHI/2 */

static int lpi2c_imx_config(struct lpi2c_imx_struct *lpi2c_imx)

{

	u8 prescale, filt, sethold, clkhi, clklo, datavd;

	unsigned int clk_rate, clk_cycle;

	u8 prescale, filt, sethold, datavd;

	unsigned int clk_rate, clk_cycle, clkhi, clklo;

	enum lpi2c_imx_pincfg pincfg;

	unsigned int temp;