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i2c: sun6i-p2wi: Prevent potential division by zero

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[ 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 <[email protected]>
Acked-by: Boris Brezillon <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Axel Lin 2016-04-13 08:54:30 +08:00 • committed by Greg Kroah-Hartman
commit a8f829886d
1 changed files with 5 additions and 0 deletions
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5
drivers/i2c/busses/i2c-sun6i-p2wi.c
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@ -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;