From: Pawel Laszczak pawell@cadence.com
stable inclusion from stable-v5.10.146 commit 905e8be5284b09e69cb16a384f796c61a54c0bb1 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I6D0VX
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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 Signed-off-by: Jialin Zhang zhangjialin11@huawei.com Reviewed-by: Zheng Zengkai zhengzengkai@huawei.com --- 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 d0d4de80680f..e3a8b6c71aa1 100644 --- a/drivers/usb/cdns3/gadget.c +++ b/drivers/usb/cdns3/gadget.c @@ -1692,6 +1692,7 @@ 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) &&