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@vger.kernel.org>
Acked-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Link: https://lore.kernel.org/r/20220825062137.5766-1-pawell@cadence.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index 8bedf0504e92f92e4211a5b59d0b247fcb0b8d00..d111cf81cecefef0f221f87d0949da642abe2cda 100644 (file)
--- 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) &&