USB: Change the scatterlist type in struct urb

Change the type of the URB's 'sg' pointer from a usb_sg_request to
a scatterlist.  This allows drivers to submit scatter-gather lists
without using the usb_sg_wait() interface.  It has the added benefit
of removing the typecasts that were added as part of patch as1368 (and
slightly decreasing the number of pointer dereferences).

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 9e27eb0c7004..a67caef265b1 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1788,7 +1788,7 @@ static unsigned int count_sg_trbs_needed(struct xhci_hcd *xhci, struct urb *urb)
 
         xhci_dbg(xhci, "count sg list trbs: \n");
         num_trbs = 0;
-        for_each_sg(urb->sg->sg, sg, num_sgs, i) {
+        for_each_sg(urb->sg, sg, num_sgs, i) {
                 unsigned int previous_total_trbs = num_trbs;
                 unsigned int len = sg_dma_len(sg);
 
@@ -1951,7 +1951,7 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
          *    the amount of memory allocated for this scatter-gather list.
          * 3. TRBs buffers can't cross 64KB boundaries.
          */
-        sg = urb->sg->sg;
+        sg = urb->sg;
         addr = (u64) sg_dma_address(sg);
         this_sg_len = sg_dma_len(sg);
         trb_buff_len = TRB_MAX_BUFF_SIZE -