From 2b046bc5aaefd4aba7195e6a73afe14f7f786692 Mon Sep 17 00:00:00 2001 From: Gregory Herrero Date: Thu, 5 Nov 2015 09:41:41 +0100 Subject: [PATCH] usb: dwc2: host: spinlock release channel Prevent dwc2 driver from accessing channel while it frees it. Acked-by: John Youn Signed-off-by: Gregory Herrero Signed-off-by: Felipe Balbi --- 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 4801e693353a..a76a58c35fea 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) && -- 2.39.5