From: Pan Bian Date: Sun, 23 Apr 2017 05:55:13 +0000 (+0800) Subject: usb: dwc3: keystone: check return value X-Git-Tag: MMI-PSA29.97-13-9~5558^2~30^2 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=018047a1dba7636e1f7fdae2cc290a528991d648;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git usb: dwc3: keystone: check return value Function devm_clk_get() returns an ERR_PTR when it fails. However, in function kdwc3_probe(), its return value is not checked, which may result in a bad memory access bug. This patch fixes the bug. Signed-off-by: Pan Bian Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/dwc3/dwc3-keystone.c b/drivers/usb/dwc3/dwc3-keystone.c index 72664700b8a2..12ee23f53cdd 100644 --- a/drivers/usb/dwc3/dwc3-keystone.c +++ b/drivers/usb/dwc3/dwc3-keystone.c @@ -107,6 +107,10 @@ static int kdwc3_probe(struct platform_device *pdev) return PTR_ERR(kdwc->usbss); kdwc->clk = devm_clk_get(kdwc->dev, "usb"); + if (IS_ERR(kdwc->clk)) { + dev_err(kdwc->dev, "unable to get usb clock\n"); + return PTR_ERR(kdwc->clk); + } error = clk_prepare_enable(kdwc->clk); if (error < 0) {