From: Masahiro Yamada Date: Mon, 30 Nov 2015 09:53:36 +0000 (+0900) Subject: i2c: uniphier_f: error out if bus speed is zero X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=51549c087f2eb5788de48a7278c3eb169d66f554;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git i2c: uniphier_f: error out if bus speed is zero There is code to divide by "bus_speed" some lines below. To eliminate the possibility of division by zero, bail out if "clock-frequency" is specified as zero. Signed-off-by: Masahiro Yamada Signed-off-by: Wolfram Sang --- diff --git a/drivers/i2c/busses/i2c-uniphier-f.c b/drivers/i2c/busses/i2c-uniphier-f.c index 67109e1d66c3..f3e5ff8522f0 100644 --- a/drivers/i2c/busses/i2c-uniphier-f.c +++ b/drivers/i2c/busses/i2c-uniphier-f.c @@ -466,6 +466,11 @@ static int uniphier_fi2c_clk_init(struct device *dev, if (of_property_read_u32(np, "clock-frequency", &bus_speed)) bus_speed = UNIPHIER_FI2C_DEFAULT_SPEED; + if (!bus_speed) { + dev_err(dev, "clock-freqyency should not be zero\n"); + return -EINVAL; + } + if (bus_speed > UNIPHIER_FI2C_MAX_SPEED) bus_speed = UNIPHIER_FI2C_MAX_SPEED;