redonkable/alistair23-linux
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xHCI: store ring's last segment and segment numbers

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

Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Tested-by: Paul Zimmerman <Paul.Zimmerman@synopsys.com>
This commit is contained in:
Andiry Xu 2012-03-05 17:49:33 +08:00 committed by Sarah Sharp
parent 3b72fca09d
commit 3fe4fe083d
2 changed files with 4 additions and 0 deletions
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2
drivers/usb/host/xhci-mem.c
View file

@ -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) {

2
drivers/usb/host/xhci.h
View file

@ -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;
};