> > tree: git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb- > next > head: 10775eb17bee1ccc02ac22bb85e50699e0576a84 > commit: 33f92a8a926761bfe23d740851d218c0c4eb6463 [151/156] chipidea: > usbmisc_imx: Allow USB OTG to work on mx51 > > drivers/usb/chipidea/usbmisc_imx.c:197 usbmisc_imx53_init() warn: > variable dereferenced before check 'reg' (see line 195) > > git remote add usb > git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git > git remote update usb > git checkout 33f92a8a926761bfe23d740851d218c0c4eb6463 > vim +/reg +197 drivers/usb/chipidea/usbmisc_imx.c > > f0c910b6 Michael Grzeschik 2013-03-30 189 reg = > usbmisc->base + MX53_USB_UH2_CTRL_OFFSET; > f0c910b6 Michael Grzeschik 2013-03-30 190 val = > readl(reg) | MX53_BM_OVER_CUR_DIS_UHx; > f0c910b6 Michael Grzeschik 2013-03-30 191 break; > f0c910b6 Michael Grzeschik 2013-03-30 192 case 3: > f0c910b6 Michael Grzeschik 2013-03-30 193 reg = > usbmisc->base + MX53_USB_UH3_CTRL_OFFSET; > f0c910b6 Michael Grzeschik 2013-03-30 194 val = > readl(reg) | MX53_BM_OVER_CUR_DIS_UHx; > f0c910b6 Michael Grzeschik 2013-03-30 @195 break; > f0c910b6 Michael Grzeschik 2013-03-30 196 } > f0c910b6 Michael Grzeschik 2013-03-30 @197 if (reg && val) > f0c910b6 Michael Grzeschik 2013-03-30 198 writel(val, > reg); > f0c910b6 Michael Grzeschik 2013-03-30 199 > spin_unlock_irqrestore(&usbmisc->lock, flags); > f0c910b6 Michael Grzeschik 2013-03-30 200 } > Would anyone can help me explain this warning, please?
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