This is a note to let you know that I've just added the patch titled
xhci: Turn NEC specific quirk for handling Stop Endpoint errors generic
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xhci-turn-nec-specific-quirk-for-handling-stop-endpo.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f33d1477db7f55664b457f32fb7c0f4e6dc8209c
Author: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Date: Tue Dec 17 12:21:21 2024 +0200
xhci: Turn NEC specific quirk for handling Stop Endpoint errors generic
[ Upstream commit e21ebe51af688eb98fd6269240212a3c7300deea ]
xHC hosts from several vendors have the same issue where endpoints start
so slowly that a later queued 'Stop Endpoint' command may complete before
endpoint is up and running.
The 'Stop Endpoint' command fails with context state error as the endpoint
still appears as stopped.
See commit 42b758137601 ("usb: xhci: Limit Stop Endpoint retries") for
details
CC: stable@xxxxxxxxxxxxxxx
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20241217102122.2316814-2-mathias.nyman@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index d318310e3135..729319d81753 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1203,8 +1203,6 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
* Keep retrying until the EP starts and stops again, on
* chips where this is known to help. Wait for 100ms.
*/
- if (!(xhci->quirks & XHCI_NEC_HOST))
- break;
if (time_is_before_jiffies(ep->stop_time + msecs_to_jiffies(100)))
break;
fallthrough;
