mmc: remove redundant irq disabling

There is no need to disable irq's when using the sg_copy_*_buffer()
functions because those functions do that already. There are also
no races for the mm_queue struct here that would require the irq's
to be disabled before calling sg_copy_*_buffer().
Signed-off-by: NJohn Ogness <john.ogness@linutronix.de>
Signed-off-by: NChris Ball <cjb@laptop.org>

drivers/mmc/card/queue.c

@@ -343,18 +343,14 @@ unsigned int mmc_queue_map_sg(struct mmc_queue *mq)
  */
 void mmc_queue_bounce_pre(struct mmc_queue *mq)
 {
-	unsigned long flags;
-
 	if (!mq->bounce_buf)
 		return;
 
 	if (rq_data_dir(mq->req) != WRITE)
 		return;
 
-	local_irq_save(flags);
 	sg_copy_to_buffer(mq->bounce_sg, mq->bounce_sg_len,
 		mq->bounce_buf, mq->sg[0].length);
-	local_irq_restore(flags);
 }
 
 /*
@@ -363,17 +359,13 @@ void mmc_queue_bounce_pre(struct mmc_queue *mq)
  */
 void mmc_queue_bounce_post(struct mmc_queue *mq)
 {
-	unsigned long flags;
-
 	if (!mq->bounce_buf)
 		return;
 
 	if (rq_data_dir(mq->req) != READ)
 		return;
 
-	local_irq_save(flags);
 	sg_copy_from_buffer(mq->bounce_sg, mq->bounce_sg_len,
 		mq->bounce_buf, mq->sg[0].length);
-	local_irq_restore(flags);
 }