xhci: Convert to use list_count()

The list API now provides the list_count() to help with counting
existing nodes in the list. Utilise it.

Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221123144901.40493-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index ad81e9a..817c31e 100644 (file)
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2532,7 +2532,6 @@ static int handle_tx_event(struct xhci_hcd *xhci,
        union xhci_trb *ep_trb;
        int status = -EINPROGRESS;
        struct xhci_ep_ctx *ep_ctx;
-       struct list_head *tmp;
        u32 trb_comp_code;
        int td_num = 0;
        bool handling_skipped_tds = false;
@@ -2580,10 +2579,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
        }
 
        /* Count current td numbers if ep->skip is set */
-       if (ep->skip) {
-               list_for_each(tmp, &ep_ring->td_list)
-                       td_num++;
-       }
+       if (ep->skip)
+               td_num += list_count(&ep_ring->td_list);
 
        /* Look for common error cases */
        switch (trb_comp_code) {