diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c
index 810a433ce53234fc35a32c068b0496e122af7951..576d7cb0b3ec7914cdeb87df1f7bdb72051418a4 100644
--- a/drivers/mmc/host/at91_mci.c
+++ b/drivers/mmc/host/at91_mci.c
@@ -834,7 +834,6 @@ static int __init at91_mci_probe(struct platform_device *pdev)
 	mmc->f_min = 375000;
 	mmc->f_max = 25000000;
 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
-	mmc->caps = MMC_CAP_BYTEBLOCK;
 
 	mmc->max_blk_size = 4095;
 	mmc->max_blk_count = mmc->max_req_size;
diff --git a/drivers/mmc/host/imxmmc.c b/drivers/mmc/host/imxmmc.c
index 04458c34281240f7a6cb6775525a0588917a181f..e33c123c702715606bccc7e90be332c02bbeb6b0 100644
--- a/drivers/mmc/host/imxmmc.c
+++ b/drivers/mmc/host/imxmmc.c
@@ -963,7 +963,7 @@ static int imxmci_probe(struct platform_device *pdev)
 	mmc->f_min = 150000;
 	mmc->f_max = CLK_RATE/2;
 	mmc->ocr_avail = MMC_VDD_32_33;
-	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_BYTEBLOCK;
+	mmc->caps = MMC_CAP_4_BIT_DATA;
 
 	/* MMC core transfer sizes tunable parameters */
 	mmc->max_hw_segs = 64;
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index d53e9a8bdaa23050f884004260bc59a0ed72215d..4a72772f4fe4d414a005ada528c037d4c6db93f4 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -391,6 +391,14 @@ static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 
 	WARN_ON(host->mrq != NULL);
 
+	if (mrq->data && (hweight32(mrq->data->blksz) > 1)) {
+		printk(KERN_ERR "%s: Unsupported block size (%d bytes)\n",
+			mmc_hostname(mmc), mrq->data->blksz);
+		mrq->cmd->error = -EINVAL;
+		mmc_request_done(mmc, mrq);
+		return;
+	}
+
 	spin_lock_irq(&host->lock);
 
 	host->mrq = mrq;
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 479d6a265dd196e31c7d1cee0021f04686615805..c63edc5c17e459cd7a37ae80d1987c9c8908eddf 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1309,7 +1309,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 	mmc->ops = &sdhci_ops;
 	mmc->f_min = host->max_clk / 256;
 	mmc->f_max = host->max_clk;
-	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK;
+	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE;
 
 	if (caps & SDHCI_CAN_DO_HISPD)
 		mmc->caps |= MMC_CAP_SD_HIGHSPEED;
diff --git a/drivers/mmc/host/tifm_sd.c b/drivers/mmc/host/tifm_sd.c
index b4a56e5e513269428e794447038dfb099364eab9..951392d2ce37140cabbac77b1d6cc146b56c3995 100644
--- a/drivers/mmc/host/tifm_sd.c
+++ b/drivers/mmc/host/tifm_sd.c
@@ -626,14 +626,21 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
 
 	spin_lock_irqsave(&sock->lock, flags);
 	if (host->eject) {
-		spin_unlock_irqrestore(&sock->lock, flags);
+		mrq->cmd->error = -ENOMEDIUM;
 		goto err_out;
 	}
 
 	if (host->req) {
 		printk(KERN_ERR "%s : unfinished request detected\n",
 		       sock->dev.bus_id);
-		spin_unlock_irqrestore(&sock->lock, flags);
+		mrq->cmd->error = -ETIMEDOUT;
+		goto err_out;
+	}
+
+	if (mrq->data && (hweight32(mrq->data->blksz) > 1)) {
+		printk(KERN_ERR "%s: Unsupported block size (%d bytes)\n",
+			sock->dev.bus_id, mrq->data->blksz);
+		mrq->cmd->error = -EINVAL;
 		goto err_out;
 	}
 
@@ -722,7 +729,7 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
 	return;
 
 err_out:
-	mrq->cmd->error = -ETIMEDOUT;
+	spin_unlock_irqrestore(&sock->lock, flags);
 	mmc_request_done(mmc, mrq);
 }
 
diff --git a/drivers/mmc/host/wbsd.c b/drivers/mmc/host/wbsd.c
index 44968c2279e128311689c3f5d5744fbf52a65de5..80db11c05f2a6e91ab155d9036338448dad2f44f 100644
--- a/drivers/mmc/host/wbsd.c
+++ b/drivers/mmc/host/wbsd.c
@@ -1219,7 +1219,7 @@ static int __devinit wbsd_alloc_mmc(struct device *dev)
 	mmc->f_min = 375000;
 	mmc->f_max = 24000000;
 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
-	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK;
+	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE;
 
 	spin_lock_init(&host->lock);
 
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index b1350dfd3e9108751b9fadd15dd8f1e61b77da2d..8e2642ebf02f48fe3e817e116158e24edfaaea41 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -87,9 +87,8 @@ struct mmc_host {
 
 #define MMC_CAP_4_BIT_DATA	(1 << 0)	/* Can the host do 4 bit transfers */
 #define MMC_CAP_MULTIWRITE	(1 << 1)	/* Can accurately report bytes sent to card on error */
-#define MMC_CAP_BYTEBLOCK	(1 << 2)	/* Can do non-log2 block sizes */
-#define MMC_CAP_MMC_HIGHSPEED	(1 << 3)	/* Can do MMC high-speed timing */
-#define MMC_CAP_SD_HIGHSPEED	(1 << 4)	/* Can do SD high-speed timing */
+#define MMC_CAP_MMC_HIGHSPEED	(1 << 2)	/* Can do MMC high-speed timing */
+#define MMC_CAP_SD_HIGHSPEED	(1 << 3)	/* Can do SD high-speed timing */
 
 	/* host specific block data */
 	unsigned int		max_seg_size;	/* see blk_queue_max_segment_size */