scsi/fcoe: Fix preempt count leak in fcoe_filter_frames()

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The error exit path leaks preempt count. Add the missing put_cpu().

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index cefbe44..f3f440c 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -1624,6 +1624,7 @@ static inline int fcoe_filter_frames(struct fc_lport *lport,
 	stats->InvalidCRCCount++;
 	if (stats->InvalidCRCCount < 5)
 		printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
+	put_cpu();
 	return -EINVAL;
 }
 
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