From 05ec31717febae2c90d4fc619db6ca9c27daeec8 Mon Sep 17 00:00:00 2001 From: Pawel Laszczak Date: Thu, 25 Aug 2022 08:21:37 +0200 Subject: [PATCH] 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: Acked-by: Peter Chen Signed-off-by: Pawel Laszczak Link: https://lore.kernel.org/r/20220825062137.5766-1-pawell@cadence.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/cdns3/gadget.c | 1 + 1 file changed, 1 insertion(+) 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) &&