usb: gadget: r8a66597: Fix two possible sleep-in-atomic-context bugs in init_controller()
The driver may sleep with holding a spinlock. The function call paths (from bottom to top) in Linux-4.16.7 are: [FUNC] msleep drivers/usb/gadget/udc/r8a66597-udc.c, 839: msleep in init_controller drivers/usb/gadget/udc/r8a66597-udc.c, 96: init_controller in r8a66597_usb_disconnect drivers/usb/gadget/udc/r8a66597-udc.c, 93: spin_lock in r8a66597_usb_disconnect [FUNC] msleep drivers/usb/gadget/udc/r8a66597-udc.c, 835: msleep in init_controller drivers/usb/gadget/udc/r8a66597-udc.c, 96: init_controller in r8a66597_usb_disconnect drivers/usb/gadget/udc/r8a66597-udc.c, 93: spin_lock in r8a66597_usb_disconnect To fix these bugs, msleep() is replaced with mdelay(). This bug is found by my static analysis tool (DSAC-2) and checked by my code review. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>zero-colors
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@ -832,11 +832,11 @@ static void init_controller(struct r8a66597 *r8a66597)
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r8a66597_bset(r8a66597, XCKE, SYSCFG0);
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msleep(3);
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mdelay(3);
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r8a66597_bset(r8a66597, PLLC, SYSCFG0);
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msleep(1);
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mdelay(1);
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r8a66597_bset(r8a66597, SCKE, SYSCFG0);
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