Add spin_lock in mv_ep_disable to prevent race condition. Change-Id: I325871081f85cc8d34e7ddff96ae4db42f126e4c Signed-off-by: Neil Zhang <zhangwm@xxxxxxxxxxx> --- drivers/usb/gadget/mv_udc_core.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c index 6891b0b..a38c79d 100644 --- a/drivers/usb/gadget/mv_udc_core.c +++ b/drivers/usb/gadget/mv_udc_core.c @@ -615,6 +615,7 @@ static int mv_ep_disable(struct usb_ep *_ep) struct mv_ep *ep; struct mv_dqh *dqh; u32 bit_pos, epctrlx, direction; + unsigned long flags; ep = container_of(_ep, struct mv_ep, ep); if ((_ep == NULL) || !ep->desc) @@ -625,6 +626,8 @@ static int mv_ep_disable(struct usb_ep *_ep) /* Get the endpoint queue head address */ dqh = ep->dqh; + spin_lock_irqsave(&udc->lock, flags); + direction = ep_dir(ep); bit_pos = 1 << ((direction == EP_DIR_OUT ? 0 : 16) + ep->ep_num); @@ -643,6 +646,9 @@ static int mv_ep_disable(struct usb_ep *_ep) ep->desc = NULL; ep->stopped = 1; + + spin_unlock_irqrestore(&udc->lock, flags); + return 0; } -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
