4.19-stable review patch. If anyone has any objections, please let me know.
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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 7c07ce116e384..540c33f4e3500 100644 --- a/drivers/i2c/busses/i2c-sun6i-p2wi.c +++ b/drivers/i2c/busses/i2c-sun6i-p2wi.c @@ -202,6 +202,11 @@ 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;