diff --git a/drivers/mmc/at91_mci.c b/drivers/mmc/at91_mci.c
index e28850dec9ed767f6192a5bf683dbc79b98cdee5..2ce50f38e3c7d21c54d22b2be788bd6f4fc0acbd 100644
--- a/drivers/mmc/at91_mci.c
+++ b/drivers/mmc/at91_mci.c
@@ -824,6 +824,7 @@ static int __init at91_mci_probe(struct platform_device *pdev)
 	mmc->caps = MMC_CAP_BYTEBLOCK;
 
 	mmc->max_blk_size = 4095;
+	mmc->max_blk_count = mmc->max_req_size;
 
 	host = mmc_priv(mmc);
 	host->mmc = mmc;
diff --git a/drivers/mmc/au1xmmc.c b/drivers/mmc/au1xmmc.c
index 74e6ac0c7f71079933ce972e5f75f0f7e5b17afd..b834be261ab7ea163eaed79f592ad180458c0d62 100644
--- a/drivers/mmc/au1xmmc.c
+++ b/drivers/mmc/au1xmmc.c
@@ -923,6 +923,7 @@ static int __devinit au1xmmc_probe(struct platform_device *pdev)
 		mmc->max_phys_segs = AU1XMMC_DESCRIPTOR_COUNT;
 
 		mmc->max_blk_size = 2048;
+		mmc->max_blk_count = 512;
 
 		mmc->ocr_avail = AU1XMMC_OCR;
 
diff --git a/drivers/mmc/imxmmc.c b/drivers/mmc/imxmmc.c
index 2107f8a8605e8f25f2e1a46f6980a9a653aa57c5..b060d4bfba29b731a37653c79d361be5b82b3c83 100644
--- a/drivers/mmc/imxmmc.c
+++ b/drivers/mmc/imxmmc.c
@@ -958,9 +958,10 @@ static int imxmci_probe(struct platform_device *pdev)
 	/* MMC core transfer sizes tunable parameters */
 	mmc->max_hw_segs = 64;
 	mmc->max_phys_segs = 64;
-	mmc->max_sectors = 64;		/* default 1 << (PAGE_CACHE_SHIFT - 9) */
 	mmc->max_seg_size = 64*512;	/* default PAGE_CACHE_SIZE */
+	mmc->max_req_size = 64*512;	/* default PAGE_CACHE_SIZE */
 	mmc->max_blk_size = 2048;
+	mmc->max_blk_count = 65535;
 
 	host = mmc_priv(mmc);
 	host->mmc = mmc;
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 9bda3fddad17380771903a39e30da3d371520ce8..fb04bdd26c36f9b5a536ce381376649fb0807267 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -109,6 +109,9 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
 	mrq->cmd->mrq = mrq;
 	if (mrq->data) {
 		BUG_ON(mrq->data->blksz > host->max_blk_size);
+		BUG_ON(mrq->data->blocks > host->max_blk_count);
+		BUG_ON(mrq->data->blocks * mrq->data->blksz >
+			host->max_req_size);
 
 		mrq->cmd->data = mrq->data;
 		mrq->data->error = 0;
@@ -1605,10 +1608,11 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
 		 */
 		host->max_hw_segs = 1;
 		host->max_phys_segs = 1;
-		host->max_sectors = 1 << (PAGE_CACHE_SHIFT - 9);
 		host->max_seg_size = PAGE_CACHE_SIZE;
 
+		host->max_req_size = PAGE_CACHE_SIZE;
 		host->max_blk_size = 512;
+		host->max_blk_count = PAGE_CACHE_SIZE / 512;
 	}
 
 	return host;
diff --git a/drivers/mmc/mmc_block.c b/drivers/mmc/mmc_block.c
index 5a4eacac0bbe89a4f6b9a26d81ac92f25dfb108a..19ccfed8a54f8b36178f3400c9a294bf15666f49 100644
--- a/drivers/mmc/mmc_block.c
+++ b/drivers/mmc/mmc_block.c
@@ -242,10 +242,12 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 			brq.cmd.arg <<= 9;
 		brq.cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
 		brq.data.blksz = 1 << md->block_bits;
-		brq.data.blocks = req->nr_sectors >> (md->block_bits - 9);
 		brq.stop.opcode = MMC_STOP_TRANSMISSION;
 		brq.stop.arg = 0;
 		brq.stop.flags = MMC_RSP_R1B | MMC_CMD_AC;
+		brq.data.blocks = req->nr_sectors >> (md->block_bits - 9);
+		if (brq.data.blocks > card->host->max_blk_count)
+			brq.data.blocks = card->host->max_blk_count;
 
 		mmc_set_data_timeout(&brq.data, card, rq_data_dir(req) != READ);
 
diff --git a/drivers/mmc/mmc_queue.c b/drivers/mmc/mmc_queue.c
index 3e35a43819fba1a75c00d7cdac55265cda17f9f8..c27e42645cdb240933456fb872e1510eeb7bc5d5 100644
--- a/drivers/mmc/mmc_queue.c
+++ b/drivers/mmc/mmc_queue.c
@@ -147,7 +147,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 
 	blk_queue_prep_rq(mq->queue, mmc_prep_request);
 	blk_queue_bounce_limit(mq->queue, limit);
-	blk_queue_max_sectors(mq->queue, host->max_sectors);
+	blk_queue_max_sectors(mq->queue, host->max_req_size / 512);
 	blk_queue_max_phys_segments(mq->queue, host->max_phys_segs);
 	blk_queue_max_hw_segments(mq->queue, host->max_hw_segs);
 	blk_queue_max_segment_size(mq->queue, host->max_seg_size);
diff --git a/drivers/mmc/mmci.c b/drivers/mmc/mmci.c
index 5d48e0081894ffff34ddb3c7a87a4c19dd6e9951..5941dd951e824bfc8a1ef9a0290590fbc8e0cefe 100644
--- a/drivers/mmc/mmci.c
+++ b/drivers/mmc/mmci.c
@@ -524,21 +524,25 @@ static int mmci_probe(struct amba_device *dev, void *id)
 	/*
 	 * Since we only have a 16-bit data length register, we must
 	 * ensure that we don't exceed 2^16-1 bytes in a single request.
-	 * Choose 64 (512-byte) sectors as the limit.
 	 */
-	mmc->max_sectors = 64;
+	mmc->max_req_size = 65535;
 
 	/*
 	 * Set the maximum segment size.  Since we aren't doing DMA
 	 * (yet) we are only limited by the data length register.
 	 */
-	mmc->max_seg_size = mmc->max_sectors << 9;
+	mmc->max_seg_size = mmc->max_req_size;
 
 	/*
 	 * Block size can be up to 2048 bytes, but must be a power of two.
 	 */
 	mmc->max_blk_size = 2048;
 
+	/*
+	 * No limit on the number of blocks transferred.
+	 */
+	mmc->max_blk_count = mmc->max_req_size;
+
 	spin_lock_init(&host->lock);
 
 	writel(0, host->base + MMCIMASK0);
diff --git a/drivers/mmc/omap.c b/drivers/mmc/omap.c
index fa69a0dc5969049b4e758b075b8017177a80d92d..1e96a2f65022eee03e234b14bae7e92fb0c30c02 100644
--- a/drivers/mmc/omap.c
+++ b/drivers/mmc/omap.c
@@ -1100,8 +1100,9 @@ static int __init mmc_omap_probe(struct platform_device *pdev)
 	mmc->max_phys_segs = 32;
 	mmc->max_hw_segs = 32;
 	mmc->max_blk_size = 2048;	/* BLEN is 11 bits (+1) */
-	mmc->max_sectors = 256; /* NBLK max 11-bits, OMAP also limited by DMA */
-	mmc->max_seg_size = mmc->max_sectors * 512;
+	mmc->max_blk_count = 2048;	/* NBLK is 11 bits (+1) */
+	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
+	mmc->max_seg_size = mmc->max_req_size;
 
 	if (host->power_pin >= 0) {
 		if ((ret = omap_request_gpio(host->power_pin)) != 0) {
diff --git a/drivers/mmc/pxamci.c b/drivers/mmc/pxamci.c
index 9fc9aed1a5efb2f4518d37dffb11066c0776ca53..9774fc68b61a0c56cae19d96276aab5bd18e56cc 100644
--- a/drivers/mmc/pxamci.c
+++ b/drivers/mmc/pxamci.c
@@ -455,6 +455,11 @@ static int pxamci_probe(struct platform_device *pdev)
 	 */
 	mmc->max_blk_size = 1023;
 
+	/*
+	 * Block count register is 16 bits.
+	 */
+	mmc->max_blk_count = 65535;
+
 	host = mmc_priv(mmc);
 	host->mmc = mmc;
 	host->dma = -1;
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 155aafe69bf4e094d7e6eada413b22b9d70ef213..99f1db92295bd7005bca1017a965a868d7afb7f0 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -1333,15 +1333,15 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 
 	/*
 	 * Maximum number of sectors in one transfer. Limited by DMA boundary
-	 * size (512KiB), which means (512 KiB/512=) 1024 entries.
+	 * size (512KiB).
 	 */
-	mmc->max_sectors = 1024;
+	mmc->max_req_size = 524288;
 
 	/*
 	 * Maximum segment size. Could be one segment with the maximum number
-	 * of sectors.
+	 * of bytes.
 	 */
-	mmc->max_seg_size = mmc->max_sectors * 512;
+	mmc->max_seg_size = mmc->max_req_size;
 
 	/*
 	 * Maximum block size. This varies from controller to controller and
@@ -1356,6 +1356,11 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 	}
 	mmc->max_blk_size = 512 << mmc->max_blk_size;
 
+	/*
+	 * Maximum block count.
+	 */
+	mmc->max_blk_count = 65535;
+
 	/*
 	 * Init tasklets.
 	 */
diff --git a/drivers/mmc/tifm_sd.c b/drivers/mmc/tifm_sd.c
index bdfad15371b89b575367cee84602a0ea019b6491..7e607b75f4bc7ffdd862acefaee44c157ad7aac3 100644
--- a/drivers/mmc/tifm_sd.c
+++ b/drivers/mmc/tifm_sd.c
@@ -885,10 +885,13 @@ static int tifm_sd_probe(struct tifm_dev *sock)
 	mmc->f_max = 24000000;
 	mmc->max_hw_segs = 1;
 	mmc->max_phys_segs = 1;
-	mmc->max_sectors = 127;
-	//2k maximum hw block length
-	mmc->max_seg_size = mmc->max_sectors << 11;
+	// limited by DMA counter - it's safer to stick with
+	// block counter has 11 bits though
+	mmc->max_blk_count = 256;
+	// 2k maximum hw block length
 	mmc->max_blk_size = 2048;
+	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
+	mmc->max_seg_size = mmc->max_req_size;
 	sock->signal_irq = tifm_sd_signal_irq;
 	rc = tifm_sd_initialize_host(host);
 
diff --git a/drivers/mmc/wbsd.c b/drivers/mmc/wbsd.c
index 5711beecb4e8cdb193a68b2fdfc1247c5c86c09d..cf16e44c030198c05b1d4f0e9766d1b99ac1b1bf 100644
--- a/drivers/mmc/wbsd.c
+++ b/drivers/mmc/wbsd.c
@@ -1343,16 +1343,15 @@ static int __devinit wbsd_alloc_mmc(struct device *dev)
 	mmc->max_phys_segs = 128;
 
 	/*
-	 * Maximum number of sectors in one transfer. Also limited by 64kB
-	 * buffer.
+	 * Maximum request size. Also limited by 64KiB buffer.
 	 */
-	mmc->max_sectors = 128;
+	mmc->max_req_size = 65536;
 
 	/*
 	 * Maximum segment size. Could be one segment with the maximum number
-	 * of segments.
+	 * of bytes.
 	 */
-	mmc->max_seg_size = mmc->max_sectors * 512;
+	mmc->max_seg_size = mmc->max_req_size;
 
 	/*
 	 * Maximum block size. We have 12 bits (= 4095) but have to subtract
@@ -1360,6 +1359,12 @@ static int __devinit wbsd_alloc_mmc(struct device *dev)
 	 */
 	mmc->max_blk_size = 4087;
 
+	/*
+	 * Maximum block count. There is no real limit so the maximum
+	 * request size will be the only restriction.
+	 */
+	mmc->max_blk_count = mmc->max_req_size;
+
 	dev_set_drvdata(dev, mmc);
 
 	return 0;
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 2da0c918a8ccd38aa05a7fd36bb013b5578938dd..913e5752569f1c70f7c3cb6315af0d3514a22c92 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -92,9 +92,10 @@ struct mmc_host {
 	unsigned int		max_seg_size;	/* see blk_queue_max_segment_size */
 	unsigned short		max_hw_segs;	/* see blk_queue_max_hw_segments */
 	unsigned short		max_phys_segs;	/* see blk_queue_max_phys_segments */
-	unsigned short		max_sectors;	/* see blk_queue_max_sectors */
 	unsigned short		unused;
+	unsigned int		max_req_size;	/* maximum number of bytes in one req */
 	unsigned int		max_blk_size;	/* maximum size of one mmc block */
+	unsigned int		max_blk_count;	/* maximum number of blocks in one req */
 
 	/* private data */
 	struct mmc_ios		ios;		/* current io bus settings */