Author: hselasky
Date: Thu Sep 25 05:59:12 2014
New Revision: 272092
URL: http://svnweb.freebsd.org/changeset/base/272092
Log:
MFC r271953:
Some XHCI hardware requires dropping the endpoint context before
adding it again.
Modified:
stable/9/sys/dev/usb/controller/xhci.c
Directory Properties:
stable/9/sys/ (props changed)
stable/9/sys/dev/ (props changed)
Modified: stable/9/sys/dev/usb/controller/xhci.c
==============================================================================
--- stable/9/sys/dev/usb/controller/xhci.c Thu Sep 25 05:47:33 2014
(r272091)
+++ stable/9/sys/dev/usb/controller/xhci.c Thu Sep 25 05:59:12 2014
(r272092)
@@ -2217,7 +2217,14 @@ xhci_configure_mask(struct usb_device *u
xhci_ctx_set_le32(sc, &pinp->ctx_input.dwInCtx0, mask);
xhci_ctx_set_le32(sc, &pinp->ctx_input.dwInCtx1, 0);
} else {
- xhci_ctx_set_le32(sc, &pinp->ctx_input.dwInCtx0, 0);
+ /*
+ * Some hardware requires that we drop the endpoint
+ * context before adding it again:
+ */
+ xhci_ctx_set_le32(sc, &pinp->ctx_input.dwInCtx0,
+ mask & XHCI_INCTX_NON_CTRL_MASK);
+
+ /* Add new endpoint context */
xhci_ctx_set_le32(sc, &pinp->ctx_input.dwInCtx1, mask);
/* find most significant set bit */
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