patch "usb: dwc3: fix TRB completion when multiple TRBs are started" added to usb tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This is a note to let you know that I've just added the patch titled

    usb: dwc3: fix TRB completion when multiple TRBs are started

to my usb git tree which can be found at
    git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.

If you have any questions about this process, please let me know.


>From 0b93a4c838fa10370d72f86fe712426ac63804de Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@xxxxxx>
Date: Thu, 4 Sep 2014 10:28:10 -0500
Subject: usb: dwc3: fix TRB completion when multiple TRBs are started

After commit 2ec2a8be (usb: dwc3: gadget:
always enable IOC on bulk/interrupt transfers)
we created a situation where it was possible to
hang a bulk/interrupt endpoint if we had more
than one pending request in our queue and they
were both started with a single Start Transfer
command.

The problems triggers because we had not enabled
Transfer In Progress event for those endpoints
and we were not able to process early giveback
of requests completed without LST bit set.

Fix the problem by finally enabling Xfer In Progress
event for all endpoint types, except control.

Fixes: 2ec2a8be (usb: dwc3: gadget: always
	enable IOC on bulk/interrupt transfers)
Cc: <stable@xxxxxxxxxxxxxxx> # v3.14+
Reported-by: Pratyush Anand <pratyush.anand@xxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
 drivers/usb/dwc3/gadget.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index e8fb231630f7..490a6ca00733 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -527,7 +527,7 @@ static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep,
 		dep->stream_capable = true;
 	}
 
-	if (usb_endpoint_xfer_isoc(desc))
+	if (!usb_endpoint_xfer_control(desc))
 		params.param1 |= DWC3_DEPCFG_XFER_IN_PROGRESS_EN;
 
 	/*
@@ -2042,12 +2042,6 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc,
 		dwc3_endpoint_transfer_complete(dwc, dep, event);
 		break;
 	case DWC3_DEPEVT_XFERINPROGRESS:
-		if (!usb_endpoint_xfer_isoc(dep->endpoint.desc)) {
-			dev_dbg(dwc->dev, "%s is not an Isochronous endpoint\n",
-					dep->name);
-			return;
-		}
-
 		dwc3_endpoint_transfer_complete(dwc, dep, event);
 		break;
 	case DWC3_DEPEVT_XFERNOTREADY:
-- 
2.1.0


--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]