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 <yamada.masahiro@xxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-uniphier-f.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/i2c/busses/i2c-uniphier-f.c b/drivers/i2c/busses/i2c-uniphier-f.c
index 67109e1..f3e5ff8 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;
--
1.9.1
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