xhci: add variable 'cmd_comp_code' in handle_cmd_completion()

This patch adds a new variable 'cmd_comp_code' to hold the command completion
status code aiming to reduce code duplication and to improve code readability.

Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 3e80532..6826ee1 100644 (file)
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1519,6 +1519,7 @@ static void handle_cmd_completion(struct xhci_hcd *xhci,
        int slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags));
        u64 cmd_dma;
        dma_addr_t cmd_dequeue_dma;
+       u32 cmd_comp_code;
 
        cmd_dma = le64_to_cpu(event->cmd_trb);
        cmd_dequeue_dma = xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg,
@@ -1537,16 +1538,15 @@ static void handle_cmd_completion(struct xhci_hcd *xhci,
        trace_xhci_cmd_completion(&xhci->cmd_ring->dequeue->generic,
                                        (struct xhci_generic_trb *) event);
 
-       if ((GET_COMP_CODE(le32_to_cpu(event->status)) == COMP_CMD_ABORT) ||
-               (GET_COMP_CODE(le32_to_cpu(event->status)) == COMP_CMD_STOP)) {
+       cmd_comp_code = GET_COMP_CODE(le32_to_cpu(event->status));
+       if (cmd_comp_code == COMP_CMD_ABORT || cmd_comp_code == COMP_CMD_STOP) {
                /* If the return value is 0, we think the trb pointed by
                 * command ring dequeue pointer is a good trb. The good
                 * trb means we don't want to cancel the trb, but it have
                 * been stopped by host. So we should handle it normally.
                 * Otherwise, driver should invoke inc_deq() and return.
                 */
-               if (handle_stopped_cmd_ring(xhci,
-                               GET_COMP_CODE(le32_to_cpu(event->status)))) {
+               if (handle_stopped_cmd_ring(xhci, cmd_comp_code)) {
                        inc_deq(xhci, xhci->cmd_ring);
                        return;
                }
@@ -1561,23 +1561,19 @@ static void handle_cmd_completion(struct xhci_hcd *xhci,
        switch (le32_to_cpu(xhci->cmd_ring->dequeue->generic.field[3])
                & TRB_TYPE_BITMASK) {
        case TRB_TYPE(TRB_ENABLE_SLOT):
-               xhci_handle_cmd_enable_slot(xhci, slot_id,
-                               GET_COMP_CODE(le32_to_cpu(event->status)));
+               xhci_handle_cmd_enable_slot(xhci, slot_id, cmd_comp_code);
                break;
        case TRB_TYPE(TRB_DISABLE_SLOT):
                xhci_handle_cmd_disable_slot(xhci, slot_id);
                break;
        case TRB_TYPE(TRB_CONFIG_EP):
-               xhci_handle_cmd_config_ep(xhci, slot_id, event,
-                               GET_COMP_CODE(le32_to_cpu(event->status)));
+               xhci_handle_cmd_config_ep(xhci, slot_id, event, cmd_comp_code);
                break;
        case TRB_TYPE(TRB_EVAL_CONTEXT):
-               xhci_handle_cmd_eval_ctx(xhci, slot_id, event,
-                               GET_COMP_CODE(le32_to_cpu(event->status)));
+               xhci_handle_cmd_eval_ctx(xhci, slot_id, event, cmd_comp_code);
                break;
        case TRB_TYPE(TRB_ADDR_DEV):
-               xhci_handle_cmd_addr_dev(xhci, slot_id,
-                               GET_COMP_CODE(le32_to_cpu(event->status)));
+               xhci_handle_cmd_addr_dev(xhci, slot_id, cmd_comp_code);
                break;
        case TRB_TYPE(TRB_STOP_RING):
                xhci_handle_cmd_stop_ep(xhci, xhci->cmd_ring->dequeue, event);