* [PATCH AUTOSEL 5.15 2/4] i2c: sun6i-p2wi: Prevent potential division by zero
[not found] <20231112132432.174680-1-sashal@kernel.org>
@ 2023-11-12 13:24 ` Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2023-11-12 13:24 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Axel Lin, Boris Brezillon, Wolfram Sang, Sasha Levin, andi.shyti,
wens, jernej.skrabec, samuel, linux-i2c, linux-arm-kernel,
linux-sunxi
From: Axel Lin <axel.lin@ingics.com>
[ Upstream commit 5ac61d26b8baff5b2e5a9f3dc1ef63297e4b53e7 ]
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: Axel Lin <axel.lin@ingics.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/i2c/busses/i2c-sun6i-p2wi.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/i2c/busses/i2c-sun6i-p2wi.c b/drivers/i2c/busses/i2c-sun6i-p2wi.c
index 9e3483f507ff5..f2ed13b551088 100644
--- a/drivers/i2c/busses/i2c-sun6i-p2wi.c
+++ b/drivers/i2c/busses/i2c-sun6i-p2wi.c
@@ -201,6 +201,11 @@ static int p2wi_probe(struct platform_device *pdev)
return -EINVAL;
}
+ if (clk_freq == 0) {
+ dev_err(dev, "clock-frequency is set to 0 in DT\n");
+ return -EINVAL;
+ }
+
if (of_get_child_count(np) > 1) {
dev_err(dev, "P2WI only supports one slave device\n");
return -EINVAL;
--
2.42.0
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