This is a note to let you know that I've just added the patch titled
usb: cdns3: fix issue with rearming ISO OUT endpoint
to the 5.4-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:
usb-cdns3-fix-issue-with-rearming-iso-out-endpoint.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f55915a7dcb9b9b3e6aad3529ad0c508dde032aa
Author: Pawel Laszczak <pawell@xxxxxxxxxxx>
Date: Thu Aug 25 08:21:37 2022 +0200
usb: cdns3: fix issue with rearming ISO OUT endpoint
[ Upstream commit b46a6b09fa056042a302b181a1941f0056944603 ]
ISO OUT endpoint is enabled during queuing first usb request
in transfer ring and disabled when TRBERR is reported by controller.
After TRBERR and before next transfer added to TR driver must again
reenable endpoint but does not.
To solve this issue during processing TRBERR event driver must
set the flag EP_UPDATE_EP_TRBADDR in priv_ep->flags field.
Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver")
cc: <stable@xxxxxxxxxxxxxxx>
Acked-by: Peter Chen <peter.chen@xxxxxxxxxx>
Signed-off-by: Pawel Laszczak <pawell@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220825062137.5766-1-pawell@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index 8bedf0504e92..d111cf81cece 100644
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -1259,6 +1259,7 @@ static int cdns3_check_ep_interrupt_proceed(struct cdns3_endpoint *priv_ep)
ep_cfg &= ~EP_CFG_ENABLE;
writel(ep_cfg, &priv_dev->regs->ep_cfg);
priv_ep->flags &= ~EP_QUIRK_ISO_OUT_EN;
+ priv_ep->flags |= EP_UPDATE_EP_TRBADDR;
}
cdns3_transfer_completed(priv_dev, priv_ep);
} else if (!(priv_ep->flags & EP_STALLED) &&
