git: a1ec8baee5dd - stable/11 - xhci(4): Only drop BULK and INTERRUPT endpoints to reset data toggle.

The branch stable/11 has been updated by hselasky:

URL: https://cgit.FreeBSD.org/src/commit/?id=a1ec8baee5dd0cb8e344ab0e2feafcf49f4a802a

commit a1ec8baee5dd0cb8e344ab0e2feafcf49f4a802a
Author:     Hans Petter Selasky <hselasky@FreeBSD.org>
AuthorDate: 2022-05-03 16:09:17 +0000
Commit:     Hans Petter Selasky <hselasky@FreeBSD.org>
CommitDate: 2022-05-04 07:30:07 +0000

    xhci(4): Only drop BULK and INTERRUPT endpoints to reset data toggle.
    
    Only drop BULK and INTERRUPT endpoints, to reset the data toggle,
    because for other endpoint types this is not critical.
    
    Tested by:      ehaupt@
    PR:             262882
    Sponsored by:   NVIDIA Networking
    
    (cherry picked from commit e276d281503160ba3648bd394cde95736ee53329)
---
 sys/dev/usb/controller/xhci.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/sys/dev/usb/controller/xhci.c b/sys/dev/usb/controller/xhci.c
index f71062059653..17fcc3ee09cf 100644
--- a/sys/dev/usb/controller/xhci.c
+++ b/sys/dev/usb/controller/xhci.c
@@ -3932,9 +3932,16 @@ xhci_configure_reset_endpoint(struct usb_xfer *xfer)
 
 	mask = (1U << epno);
 
-	if (epno != 1 && drop != 0) {
+	/*
+	 * So-called control and isochronous transfer types have
+	 * predefined data toggles (USB 2.0) or sequence numbers (USB
+	 * 3.0) and does not need to be dropped.
+	 */
+	if (drop != 0 &&
+	    (edesc->bmAttributes & UE_XFERTYPE) != UE_CONTROL &&
+	    (edesc->bmAttributes & UE_XFERTYPE) != UE_ISOCHRONOUS) {
 		/* drop endpoint context to reset data toggle value, if any. */
-	  	xhci_configure_mask(udev, mask, 1);
+		xhci_configure_mask(udev, mask, 1);
 		err = xhci_cmd_configure_ep(sc, buf_inp.physaddr, 0, index);
 		if (err != 0) {
 			DPRINTF("Could not drop "