commit d6eef886903c ("usb: cdns3: Enable TDL_CHK only for OUT ep") upstream.

ZLP gets stuck if TDL_CHK bit is set and TDL_FROM_TRB is used as TDL source for IN endpoints. To fix it, TDL_CHK is only enabled for OUT endpoints.

Cc: stable@vger.kernel.org # 5.4, 5.10 Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver") Reported-by: Aswath Govindraju a-govindraju@ti.com Signed-off-by: Sanket Parmar sparmar@cadence.com --- drivers/usb/cdns3/gadget.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c index f32f00c49571..c3bf54cc530f 100644 --- a/drivers/usb/cdns3/gadget.c +++ b/drivers/usb/cdns3/gadget.c @@ -1531,7 +1531,7 @@ void cdns3_configure_dmult(struct cdns3_device *priv_dev, else mask = BIT(priv_ep->num);

- if (priv_ep->type != USB_ENDPOINT_XFER_ISOC) { + if (priv_ep->type != USB_ENDPOINT_XFER_ISOC && !priv_ep->dir) { cdns3_set_register_bit(&regs->tdl_from_trb, mask); cdns3_set_register_bit(&regs->tdl_beh, mask); cdns3_set_register_bit(&regs->tdl_beh2, mask); @@ -1569,15 +1569,13 @@ void cdns3_ep_config(struct cdns3_endpoint *priv_ep) case USB_ENDPOINT_XFER_INT: ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_INT);

- if ((priv_dev->dev_ver == DEV_VER_V2 && !priv_ep->dir) || - priv_dev->dev_ver > DEV_VER_V2) + if (priv_dev->dev_ver >= DEV_VER_V2 && !priv_ep->dir) ep_cfg |= EP_CFG_TDL_CHK; break; case USB_ENDPOINT_XFER_BULK: ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_BULK);

- if ((priv_dev->dev_ver == DEV_VER_V2 && !priv_ep->dir) || - priv_dev->dev_ver > DEV_VER_V2) + if (priv_dev->dev_ver >= DEV_VER_V2 && !priv_ep->dir) ep_cfg |= EP_CFG_TDL_CHK; break; default: