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Commit 51eb01a7 authored by Andiry Xu's avatar Andiry Xu Committed by Sarah Sharp
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xHCI 1.0: Control endpoint average TRB length field set 



xHCI 1.0 specification indicates that software should set Average TRB Length
to '8' for control endpoints.

Signed-off-by: default avatarAndiry Xu <andiry.xu@amd.com>
Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
parent b83cdc8f

drivers/usb/host/xhci-mem.c

+8 −1
Original line number Diff line number Diff line
@@ -1246,8 +1246,15 @@ int xhci_endpoint_init(struct xhci_hcd *xhci, 
	 * including link TRBs, No-op TRBs, and Event data TRBs.  Since we don't

	 * use Event Data TRBs, and we don't chain in a link TRB on short

	 * transfers, we're basically dividing by 1.

	 *

	 * xHCI 1.0 specification indicates that the Average TRB Length should

	 * be set to 8 for control endpoints.

	 */

	ep_ctx->tx_info |= cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(max_esit_payload));

	if (usb_endpoint_xfer_control(&ep->desc) && xhci->hci_version == 0x100)

		ep_ctx->tx_info |= cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(8));

	else

		ep_ctx->tx_info |=

			 cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(max_esit_payload));



	/* FIXME Debug endpoint context */

	return 0;