[SCSI] fcoe: remove frame dropping code from fcoe_percpu_clean

commit e7a51997dad4e17395be1209970e18d2e9305b24 ([SCSI] fcoe: flush per-cpu
thread work when destroying interface) added a skb flush to the fcoe_rx_list,
which ensures that we push any pending frames on the list through the per-cpu
receive thread.  Because of this, its redundant to lock and scan the list
first, dropping any arriving frames.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 3 insertions, 19 deletions

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 961bf364429a..d86ca37b3787 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -2254,31 +2254,14 @@ static int fcoe_link_ok(struct fc_lport *lport)
 static void fcoe_percpu_clean(struct fc_lport *lport)
 {
         struct fcoe_percpu_s *pp;
-        struct fcoe_rcv_info *fr;
-        struct sk_buff_head *list;
-        struct sk_buff *skb, *next;
-        struct sk_buff *head;
+        struct sk_buff *skb;
         unsigned int cpu;
 
         for_each_possible_cpu(cpu) {
                 pp = &per_cpu(fcoe_percpu, cpu);
-                spin_lock_bh(&pp->fcoe_rx_list.lock);
-                list = &pp->fcoe_rx_list;
-                head = list->next;
-                for (skb = head; skb != (struct sk_buff *)list;
-                     skb = next) {
-                        next = skb->next;
-                        fr = fcoe_dev_from_skb(skb);
-                        if (fr->fr_dev == lport) {
-                                __skb_unlink(skb, list);
-                                kfree_skb(skb);
-                        }
-                }
 
-                if (!pp->thread || !cpu_online(cpu)) {
-                        spin_unlock_bh(&pp->fcoe_rx_list.lock);
+                if (!pp->thread || !cpu_online(cpu))
                         continue;
-                }
 
                 skb = dev_alloc_skb(0);
                 if (!skb) {
@@ -2287,6 +2270,7 @@ static void fcoe_percpu_clean(struct fc_lport *lport)
                 }
                 skb->destructor = fcoe_percpu_flush_done;
 
+                spin_lock_bh(&pp->fcoe_rx_list.lock);
                 __skb_queue_tail(&pp->fcoe_rx_list, skb);
                 if (pp->fcoe_rx_list.qlen == 1)
                         wake_up_process(pp->thread);