From: Yunfan Zhang <yfzhang@xxxxxxxxxxx>
Fix system hang in udc shutdown routine which caused by accessing usb
register when clock is disabled. So enable usb clock before access
register.
Signed-off-by: Yunfan Zhang <yfzhang@xxxxxxxxxxx>
Signed-off-by: Neil Zhang <zhangwm@xxxxxxxxxxx>
---
drivers/usb/gadget/mv_udc_core.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c
index ff6154d..58edff9 100644
--- a/drivers/usb/gadget/mv_udc_core.c
+++ b/drivers/usb/gadget/mv_udc_core.c
@@ -2501,9 +2501,11 @@ static void mv_udc_shutdown(struct platform_device *dev)
u32 mode;
/* reset controller mode to IDLE */
+ mv_udc_enable(udc);
mode = readl(&udc->op_regs->usbmode);
mode &= ~3;
writel(mode, &udc->op_regs->usbmode);
+ mv_udc_disable(udc);
}
static struct platform_driver udc_driver = {
--
1.7.4.1
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