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Partial revert of f83f5d5839 for uftdi(4).

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Apparently devices with bcdDevice less than 0x0600, have problems receiving ZLPs.

Reported by:	kevlo@
MFC after:	1 week
Sponsored by:	NVIDIA Networking
This commit is contained in:
Hans Petter Selasky 2021-08-20 09:52:32 +02:00
parent ced2dcadcc
commit bcb195d917
1 changed files with 1 additions and 4 deletions
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5
sys/dev/usb/serial/uftdi.c
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@ -1117,7 +1117,7 @@ uftdi_attach(device_t dev)
}
/* clear stall at first run */
mtx_lock(&sc->sc_mtx);
usbd_xfer_set_zlp(sc->sc_xfer[UFTDI_BULK_DT_WR]);
usbd_xfer_set_stall(sc->sc_xfer[UFTDI_BULK_DT_WR]);
mtx_unlock(&sc->sc_mtx);
/* set a valid "lcr" value */
@ -1215,9 +1215,6 @@ uftdi_write_callback(struct usb_xfer *xfer, usb_error_t error)
case USB_ST_SETUP:
case USB_ST_TRANSFERRED:
tr_setup:
if (usbd_xfer_get_and_clr_zlp(xfer))
break;
/*
* If output packets don't require headers (the common case) we
* can just load the buffer up with payload bytes all at once.