mmc: toshsd: Fix unbalanced locking

Fix returning IRQ_HANDLED with spin_lock held.

Signed-off-by: Axel Lin <[e-mail]>
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/toshsd.c

···
 	spin_lock_irqsave(&host->lock, flags);
 
 	if (!sg_miter_next(sg_miter))
-		return IRQ_HANDLED;
+		goto done;
+
 	buf = sg_miter->addr;
 
 	/* Ensure we dont read more than one block. The chip will interrupt us
···
 	sg_miter->consumed = count;
 	sg_miter_stop(sg_miter);
 
+done:
 	spin_unlock_irqrestore(&host->lock, flags);
 
 	return IRQ_HANDLED;