From 34cf2acdafaa31a13821e45de5ee896adcd307b1 Mon Sep 17 00:00:00 2001
From: Wolfram Sang <wsa@the-dreams.de>
Date: Sun, 3 Apr 2016 23:32:00 +0200
Subject: [PATCH] i2c: jz4780: prevent potential division by zero
Make sure we don't OOPS in case clock-frequency is set to 0 in a DT. The
variable set here is later used as a divisor.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
---
drivers/i2c/busses/i2c-jz4780.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c
index f325663c27c5..597408fc6834 100644
--- a/drivers/i2c/busses/i2c-jz4780.c
+++ b/drivers/i2c/busses/i2c-jz4780.c
@@ -770,7 +770,7 @@ static int jz4780_i2c_probe(struct platform_device *pdev)
ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency",
&clk_freq);
- if (ret) {
+ if (ret || clk_freq == 0) {
dev_err(&pdev->dev, "clock-frequency not specified in DT");
goto err;
}
--
GitLab