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Commit 3fe4fe08 authored by Andiry Xu's avatar Andiry Xu Committed by Sarah Sharp
Browse files

xHCI: store ring's last segment and segment numbers 



Store the ring's last segment pointer and number of segments for ring
expansion usage.

Signed-off-by: default avatarAndiry Xu <andiry.xu@amd.com>
Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
Tested-by: default avatarPaul Zimmerman <Paul.Zimmerman@synopsys.com>
parent 3b72fca0

drivers/usb/host/xhci-mem.c

+2 −0
Original line number Diff line number Diff line
@@ -154,6 +154,7 @@ static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci, 
	if (!ring)

		return NULL;



	ring->num_segs = num_segs;

	INIT_LIST_HEAD(&ring->td_list);

	ring->type = type;

	if (num_segs == 0)
@@ -177,6 +178,7 @@ static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci, 
		num_segs--;

	}

	xhci_link_segments(xhci, prev, ring->first_seg, type);

	ring->last_seg = prev;



	/* Only event ring does not use link TRB */

	if (type != TYPE_EVENT) {

drivers/usb/host/xhci.h

+2 −0
Original line number Diff line number Diff line
@@ -1262,6 +1262,7 @@ enum xhci_ring_type { 


struct xhci_ring {

	struct xhci_segment	*first_seg;

	struct xhci_segment	*last_seg;

	union  xhci_trb		*enqueue;

	struct xhci_segment	*enq_seg;

	unsigned int		enq_updates;
@@ -1276,6 +1277,7 @@ struct xhci_ring { 
	 */

	u32			cycle_state;

	unsigned int		stream_id;

	unsigned int		num_segs;

	enum xhci_ring_type	type;

	bool			last_td_was_short;

};