The ov5670 driver tries to get a reference to the xvclk provider by using the common cock framework and deflects to parsing the "clock-frequency" property in case the clock provider is not specified in the firmware interface, detected by checking if ov5670->xvclk == PTR_ERR(-ENOENT). However, as reported by the Smatch static checker, if CONFIG_HAVE_CLK is not enabled, devm_clk_get() returns 0 which when passed to PTR_ERR() means success causing the driver to fail without propagating any error code up. Explicitly handle the case where ov5670->xvclk it set to NULL, forcing the code to parse the "clock-frequency" property in case CONFIG_HAVE_CLK is not enabled, as suggested by Dan Carpenter. Reported-by: Dan Carpenter <error27@xxxxxxxxx> Suggested-by: Dan Carpenter <error27@xxxxxxxxx> Signed-off-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx> --- Patch based on Sakari's master branch. As the patch series has not landed in Mauro's tree, I've not added a Fixes: tag yet. --- drivers/media/i2c/ov5670.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/i2c/ov5670.c b/drivers/media/i2c/ov5670.c index f79d908f4531..275ae24316fe 100644 --- a/drivers/media/i2c/ov5670.c +++ b/drivers/media/i2c/ov5670.c @@ -2663,7 +2663,7 @@ static int ov5670_probe(struct i2c_client *client) ov5670->xvclk = devm_clk_get(&client->dev, NULL); if (!IS_ERR_OR_NULL(ov5670->xvclk)) input_clk = clk_get_rate(ov5670->xvclk); - else if (PTR_ERR(ov5670->xvclk) == -ENOENT) + else if (!ov5670->xvclk || PTR_ERR(ov5670->xvclk) == -ENOENT) device_property_read_u32(&client->dev, "clock-frequency", &input_clk); else -- 2.39.0
