From: Wei Yongjun <weiyongjun1@xxxxxxxxxx> In case of error, the function devm_ioremap_resource() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx> --- drivers/watchdog/wdat_wdt.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c index 6b64645..4594723 100644 --- a/drivers/watchdog/wdat_wdt.c +++ b/drivers/watchdog/wdat_wdt.c @@ -351,16 +351,17 @@ static int wdat_wdt_probe(struct platform_device *pdev) res = &pdev->resource[i]; if (resource_type(res) == IORESOURCE_MEM) { reg = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(reg)) + return PTR_ERR(reg); } else if (resource_type(res) == IORESOURCE_IO) { reg = devm_ioport_map(&pdev->dev, res->start, 1); + if (!reg) + return -ENOMEM; } else { dev_err(&pdev->dev, "Unsupported resource\n"); return -EINVAL; } - if (!reg) - return -ENOMEM; - regs[i] = reg; } -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html