cciss: unlock on error path

We take the spin_lock again in fail_all_cmds() so we need to unlock
here.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

drivers/block/cciss.c

@@ -3341,6 +3341,7 @@ static irqreturn_t do_cciss_intr(int irq, void *dev_id)
 					printk(KERN_WARNING
 					       "cciss: controller cciss%d failed, stopping.\n",
 					       h->ctlr);
+					spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
 					fail_all_cmds(h->ctlr);
 					return IRQ_HANDLED;
 				}