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usb: dwc2: host: spinlock release channel 

Prevent dwc2 driver from accessing channel while it frees it.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Gregory Herrero 2015-11-05 09:41:41 +01:00 committed by Felipe Balbi
parent 26a19ea699
commit 2b046bc5aa
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/dwc2/hcd_ddma.c
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@ -360,6 +360,8 @@ int dwc2_hcd_qh_init_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
*/
void dwc2_hcd_qh_free_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
{
unsigned long flags;
dwc2_desc_list_free(hsotg, qh);
/*
@ -369,8 +371,10 @@ void dwc2_hcd_qh_free_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
* when it comes here from endpoint disable routine
* channel remains assigned.
*/
spin_lock_irqsave(&hsotg->lock, flags);
if (qh->channel)
dwc2_release_channel_ddma(hsotg, qh);
spin_unlock_irqrestore(&hsotg->lock, flags);
if ((qh->ep_type == USB_ENDPOINT_XFER_ISOC ||
qh->ep_type == USB_ENDPOINT_XFER_INT) &&