From 2fdcd47b6980f4e26a97811a17f5be7cb919ef90 Mon Sep 17 00:00:00 2001 From: Andiry Xu Date: Mon, 5 Mar 2012 17:49:39 +0800 Subject: [PATCH] xHCI: Allocate 2 segments for transfer ring 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 Signed-off-by: Sarah Sharp Tested-by: Paul Zimmerman --- drivers/usb/host/xhci-mem.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index c37aa1ba9126..cae4c6f2845a 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) -- 2.20.1