From: Julia Lawall <Julia.Lawall@xxxxxxx> Delete successive tests to the same location. In this case res has already been tested for being NULL, and calling devm_request_and_ioremap will not make it NULL. On the other hand, devm_request_and_ioremap can return NULL on failure. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @s exists@ local idexpression y; expression x,e; @@ *if ( \(x == NULL\|IS_ERR(x)\|y != 0\) ) { ... when forall return ...; } ... when != \(y = e\|y += e\|y -= e\|y |= e\|y &= e\|y++\|y--\|&y\) when != \(XT_GETPAGE(...,y)\|WMI_CMD_BUF(...)\) *if ( \(x == NULL\|IS_ERR(x)\|y != 0\) ) { ... when forall return ...; } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx> --- This code could be improved in other ways. The previous NULL test on res is not needed, and the dev_err in the error-handling code for the call to devm_request_and_ioremap is redundant with respect to the logging already done by devm_request_and_ioremap. But these should probably be done separately. drivers/usb/chipidea/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index aebf695..57cae1f 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -411,7 +411,7 @@ static int ci_hdrc_probe(struct platform_device *pdev) } base = devm_request_and_ioremap(dev, res); - if (!res) { + if (!base) { dev_err(dev, "can't request and ioremap resource\n"); return -ENOMEM; } -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
