diff options
| author | Andiry Xu <andiry.xu@amd.com> | 2012-03-05 17:49:37 +0800 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2012-03-13 09:30:24 -0700 |
| commit | 8dfec6140fc617b932cf9a09ba46d0ee3f3a7d87 (patch) | |
| tree | 0929c51b289a54c7ac11e6919ff1f9ae737535ff /drivers/usb/host/xhci.h | |
| parent | 186a7ef13a8fa3bc7cca1ccd33bd469b931e46de (diff) | |
| download | linux-8dfec6140fc617b932cf9a09ba46d0ee3f3a7d87.tar.bz2 | |
xHCI: dynamic ring expansion
If room_on_ring() check fails, try to expand the ring and check again.
When expand a ring, use a cached ring or allocate new segments, link
the original ring and the new ring or segments, update the original ring's
segment numbers and the last segment pointer.
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>
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index ea8fc237d158..57cd632064b4 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1622,6 +1622,8 @@ int xhci_endpoint_init(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, struct usb_device *udev, struct usb_host_endpoint *ep, gfp_t mem_flags); void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring); +int xhci_ring_expansion(struct xhci_hcd *xhci, struct xhci_ring *ring, + unsigned int num_trbs, gfp_t flags); void xhci_free_or_cache_endpoint_ring(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, unsigned int ep_index); |