Allocate 2 segments for transfer ring by default, so we can expand the ring
when the enqueue pointer and dequeue pointer are in different segments.
Signed-off-by: Andiry Xu <andiry.xu@xxxxxxx>
---
drivers/usb/host/xhci-mem.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index c37aa1b..cae4c6f 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -642,7 +642,7 @@ struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci,
*/
for (cur_stream = 1; cur_stream < num_streams; cur_stream++) {
stream_info->stream_rings[cur_stream] =
- xhci_ring_alloc(xhci, 1, 1, TYPE_STREAM, mem_flags);
+ xhci_ring_alloc(xhci, 2, 1, TYPE_STREAM, mem_flags);
cur_ring = stream_info->stream_rings[cur_stream];
if (!cur_ring)
goto cleanup_rings;
@@ -976,7 +976,7 @@ int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id,
}
/* Allocate endpoint 0 ring */
- dev->eps[0].ring = xhci_ring_alloc(xhci, 1, 1, TYPE_CTRL, flags);
+ dev->eps[0].ring = xhci_ring_alloc(xhci, 2, 1, TYPE_CTRL, flags);
if (!dev->eps[0].ring)
goto fail;
@@ -1423,7 +1423,7 @@ int xhci_endpoint_init(struct xhci_hcd *xhci,
type = usb_endpoint_type(&ep->desc);
/* Set up the endpoint ring */
virt_dev->eps[ep_index].new_ring =
- xhci_ring_alloc(xhci, 1, 1, type, mem_flags);
+ xhci_ring_alloc(xhci, 2, 1, type, mem_flags);
if (!virt_dev->eps[ep_index].new_ring) {
/* Attempt to use the ring cache */
if (virt_dev->num_rings_cached == 0)
--
1.7.4.1
--
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