From 770f45160a6aab68dec31e0bba5796b45b9926fb Mon Sep 17 00:00:00 2001
From: Martin Jansa <Martin.Jansa@gmail.com>
Date: Wed, 25 May 2011 23:08:30 +0200
Subject: [PATCH 44/69] Revert "mmc: add a second mmc queue request member"

This reverts commit 6d08e164f59139f5fc36bfa9957743f377fea37d.
---
 drivers/mmc/card/queue.c |   44 ++------------------------------------------
 drivers/mmc/card/queue.h |    3 +--
 2 files changed, 3 insertions(+), 44 deletions(-)

diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index eef3510..40e18b5 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -130,7 +130,6 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 	u64 limit = BLK_BOUNCE_HIGH;
 	int ret;
 	struct mmc_queue_req *mqrq_cur = &mq->mqrq[0];
-	struct mmc_queue_req *mqrq_prev = &mq->mqrq[1];
 
 	if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask)
 		limit = *mmc_dev(host)->dma_mask;
@@ -141,9 +140,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 		return -ENOMEM;
 
 	memset(&mq->mqrq_cur, 0, sizeof(mq->mqrq_cur));
-	memset(&mq->mqrq_prev, 0, sizeof(mq->mqrq_prev));
 	mq->mqrq_cur = mqrq_cur;
-	mq->mqrq_prev = mqrq_prev;
 	mq->queue->queuedata = mq;
 
 	blk_queue_prep_rq(mq->queue, mmc_prep_request);
@@ -184,17 +181,9 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 					"allocate bounce cur buffer\n",
 					mmc_card_name(card));
 			}
-			mqrq_prev->bounce_buf = kmalloc(bouncesz, GFP_KERNEL);
-			if (!mqrq_prev->bounce_buf) {
-				printk(KERN_WARNING "%s: unable to "
-					"allocate bounce prev buffer\n",
-					mmc_card_name(card));
-				kfree(mqrq_cur->bounce_buf);
-				mqrq_cur->bounce_buf = NULL;
-			}
 		}
 
-		if (mqrq_cur->bounce_buf && mqrq_prev->bounce_buf) {
+		if (mqrq_cur->bounce_buf) {
 			blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_ANY);
 			blk_queue_max_hw_sectors(mq->queue, bouncesz / 512);
 			blk_queue_max_segments(mq->queue, bouncesz / 512);
@@ -209,19 +198,11 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 			if (ret)
 				goto cleanup_queue;
 
-			mqrq_prev->sg = mmc_alloc_sg(1, &ret);
-			if (ret)
-				goto cleanup_queue;
-
-			mqrq_prev->bounce_sg =
-				mmc_alloc_sg(bouncesz / 512, &ret);
-			if (ret)
-				goto cleanup_queue;
 		}
 	}
 #endif
 
-	if (!mqrq_cur->bounce_buf && !mqrq_prev->bounce_buf) {
+	if (!mqrq_cur->bounce_buf) {
 		blk_queue_bounce_limit(mq->queue, limit);
 		blk_queue_max_hw_sectors(mq->queue,
 			min(host->max_blk_count, host->max_req_size / 512));
@@ -232,10 +213,6 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 		if (ret)
 			goto cleanup_queue;
 
-
-		mqrq_prev->sg = mmc_alloc_sg(host->max_segs, &ret);
-		if (ret)
-			goto cleanup_queue;
 	}
 
 	sema_init(&mq->thread_sem, 1);
@@ -252,8 +229,6 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
  free_bounce_sg:
 	kfree(mqrq_cur->bounce_sg);
 	mqrq_cur->bounce_sg = NULL;
-	kfree(mqrq_prev->bounce_sg);
-	mqrq_prev->bounce_sg = NULL;
 
  cleanup_queue:
 	kfree(mqrq_cur->sg);
@@ -261,11 +236,6 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 	kfree(mqrq_cur->bounce_buf);
 	mqrq_cur->bounce_buf = NULL;
 
-	kfree(mqrq_prev->sg);
-	mqrq_prev->sg = NULL;
-	kfree(mqrq_prev->bounce_buf);
-	mqrq_prev->bounce_buf = NULL;
-
 	blk_cleanup_queue(mq->queue);
 	return ret;
 }
@@ -275,7 +245,6 @@ void mmc_cleanup_queue(struct mmc_queue *mq)
 	struct request_queue *q = mq->queue;
 	unsigned long flags;
 	struct mmc_queue_req *mqrq_cur = mq->mqrq_cur;
-	struct mmc_queue_req *mqrq_prev = mq->mqrq_prev;
 
 	/* Make sure the queue isn't suspended, as that will deadlock */
 	mmc_queue_resume(mq);
@@ -298,15 +267,6 @@ void mmc_cleanup_queue(struct mmc_queue *mq)
 	kfree(mqrq_cur->bounce_buf);
 	mqrq_cur->bounce_buf = NULL;
 
-	kfree(mqrq_prev->bounce_sg);
-	mqrq_prev->bounce_sg = NULL;
-
-	kfree(mqrq_prev->sg);
-	mqrq_prev->sg = NULL;
-
-	kfree(mqrq_prev->bounce_buf);
-	mqrq_prev->bounce_buf = NULL;
-
 	mq->card = NULL;
 }
 EXPORT_SYMBOL(mmc_cleanup_queue);
diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h
index 0e65807..468044f 100644
--- a/drivers/mmc/card/queue.h
+++ b/drivers/mmc/card/queue.h
@@ -28,9 +28,8 @@ struct mmc_queue {
 	int			(*issue_fn)(struct mmc_queue *, struct request *);
 	void			*data;
 	struct request_queue	*queue;
-	struct mmc_queue_req	mqrq[2];
+	struct mmc_queue_req	mqrq[1];
 	struct mmc_queue_req	*mqrq_cur;
-	struct mmc_queue_req	*mqrq_prev;
 };
 
 extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *);
-- 
1.7.2.5