The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From b46a6b09fa056042a302b181a1941f0056944603 Mon Sep 17 00:00:00 2001
From: Pawel Laszczak <pawell@xxxxxxxxxxx>
Date: Thu, 25 Aug 2022 08:21:37 +0200
Subject: [PATCH] usb: cdns3: fix issue with rearming ISO OUT endpoint
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>
diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c
index 4f11c311acaf..5adcb349718c 100644
--- a/drivers/usb/cdns3/cdns3-gadget.c
+++ b/drivers/usb/cdns3/cdns3-gadget.c
@@ -1691,6 +1691,7 @@ 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) &&
