[SCSI] libfcoe: fip: allow FIP receive to be called from IRQ.
FIP's fcoe_ctlr_recv() function was previously only called from
the soft IRQ in FCoE. It's not performance critical and is more
convenient for some drivers to call it from the IRQ level. Just
Change to use skb_queue()/dequeue() which uses spinlock_irqsave
instead of separate locking with _bh locks.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index 99f583f..787e722 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -156,9 +156,7 @@
void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
{
cancel_work_sync(&fip->recv_work);
- spin_lock_bh(&fip->fip_recv_list.lock);
- __skb_queue_purge(&fip->fip_recv_list);
- spin_unlock_bh(&fip->fip_recv_list.lock);
+ skb_queue_purge(&fip->fip_recv_list);
spin_lock_bh(&fip->lock);
fip->state = FIP_ST_DISABLED;
@@ -1005,13 +1003,11 @@
* @fip: The FCoE controller that received the packet
* @skb: The received FIP packet
*
- * This is called from NET_RX_SOFTIRQ.
+ * This may be called from either NET_RX_SOFTIRQ or IRQ.
*/
void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
- spin_lock_bh(&fip->fip_recv_list.lock);
- __skb_queue_tail(&fip->fip_recv_list, skb);
- spin_unlock_bh(&fip->fip_recv_list.lock);
+ skb_queue_tail(&fip->fip_recv_list, skb);
schedule_work(&fip->recv_work);
}
EXPORT_SYMBOL(fcoe_ctlr_recv);
@@ -1251,13 +1247,8 @@
struct sk_buff *skb;
fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
- spin_lock_bh(&fip->fip_recv_list.lock);
- while ((skb = __skb_dequeue(&fip->fip_recv_list))) {
- spin_unlock_bh(&fip->fip_recv_list.lock);
+ while ((skb = skb_dequeue(&fip->fip_recv_list)))
fcoe_ctlr_recv_handler(fip, skb);
- spin_lock_bh(&fip->fip_recv_list.lock);
- }
- spin_unlock_bh(&fip->fip_recv_list.lock);
}
/**