Prevent dwc2 driver from accessing channel while it frees it.
Signed-off-by: Gregory Herrero <gregory.herrero@xxxxxxxxx>
---
drivers/usb/dwc2/hcd_ddma.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/dwc2/hcd_ddma.c b/drivers/usb/dwc2/hcd_ddma.c
index 4801e69..a76a58c 100644
--- a/drivers/usb/dwc2/hcd_ddma.c
+++ b/drivers/usb/dwc2/hcd_ddma.c
@@ -360,6 +360,8 @@ err0:
*/
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) &&
--
2.6.1
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