3 files changed, 24 insertions, 10 deletions

diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index c1dfd03d559a..41bfb5dfe6ff 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -15,6 +15,7 @@
 #include <linux/mmc/host.h>
 #include <linux/mmc/card.h>
 #include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
 
 #include "core.h"
 #include "sysfs.h"
@@ -192,6 +193,16 @@ static int mmc_read_switch(struct mmc_card *card)
         int err;
         u8 *status;
 
+        if (card->scr.sda_vsn < SCR_SPEC_VER_1)
+                return MMC_ERR_NONE;
+
+        if (!(card->csd.cmdclass & CCC_SWITCH)) {
+                printk(KERN_WARNING "%s: card lacks mandatory switch "
+                        "function, performance might suffer.\n",
+                        mmc_hostname(card->host));
+                return MMC_ERR_NONE;
+        }
+
         err = MMC_ERR_FAILED;
 
         status = kmalloc(64, GFP_KERNEL);
@@ -204,10 +215,9 @@ static int mmc_read_switch(struct mmc_card *card)
 
         err = mmc_sd_switch(card, 0, 0, 1, status);
         if (err != MMC_ERR_NONE) {
-                /*
-                 * Card not supporting high-speed will ignore the
-                 * command.
-                 */
+                printk(KERN_WARNING "%s: problem reading switch "
+                        "capabilities, performance might suffer.\n",
+                        mmc_hostname(card->host));
                 err = MMC_ERR_NONE;
                 goto out;
         }
@@ -229,6 +239,12 @@ static int mmc_switch_hs(struct mmc_card *card)
         int err;
         u8 *status;
 
+        if (card->scr.sda_vsn < SCR_SPEC_VER_1)
+                return MMC_ERR_NONE;
+
+        if (!(card->csd.cmdclass & CCC_SWITCH))
+                return MMC_ERR_NONE;
+
         if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
                 return MMC_ERR_NONE;
 
@@ -402,7 +418,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
         /*
          * Switch to wider bus (if supported).
          */
-        if ((host->caps && MMC_CAP_4_BIT_DATA) &&
+        if ((host->caps & MMC_CAP_4_BIT_DATA) &&
                 (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
                 err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
                 if (err != MMC_ERR_NONE)
diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c
index e37943c314cb..5b00c194b628 100644
--- a/drivers/mmc/host/at91_mci.c
+++ b/drivers/mmc/host/at91_mci.c
@@ -417,7 +417,7 @@ static unsigned int at91_mci_send_command(struct at91mci_host *host, struct mmc_
                 blocks = 0;
         }
 
-        if (cmd->opcode == MMC_STOP_TRANSMISSION)
+        if (host->flags & FL_SENT_STOP)
                 cmdr |= AT91_MCI_TRCMD_STOP;
 
         if (host->bus_mode == MMC_BUSMODE_OPENDRAIN)
@@ -563,8 +563,7 @@ static void at91mci_completed_command(struct at91mci_host *host)
         if (status & (AT91_MCI_RINDE | AT91_MCI_RDIRE | AT91_MCI_RCRCE |
                         AT91_MCI_RENDE | AT91_MCI_RTOE | AT91_MCI_DCRCE |
                         AT91_MCI_DTOE | AT91_MCI_OVRE | AT91_MCI_UNRE)) {
-                if ((status & AT91_MCI_RCRCE) &&
-                        ((cmd->opcode == MMC_SEND_OP_COND) || (cmd->opcode == SD_APP_OP_COND))) {
+                if ((status & AT91_MCI_RCRCE) && !(mmc_resp_type(cmd) & MMC_RSP_CRC)) {
                         cmd->error = MMC_ERR_NONE;
                 }
                 else {
diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c
index f967226d7505..52b63f11ddd6 100644
--- a/drivers/mmc/host/au1xmmc.c
+++ b/drivers/mmc/host/au1xmmc.c
@@ -76,8 +76,7 @@ const struct {
 #endif
 };
 
-#define AU1XMMC_CONTROLLER_COUNT \
-        (sizeof(au1xmmc_card_table) / sizeof(au1xmmc_card_table[0]))
+#define AU1XMMC_CONTROLLER_COUNT (ARRAY_SIZE(au1xmmc_card_table))
 
 /* This array stores pointers for the hosts (used by the IRQ handler) */
 struct au1xmmc_host *au1xmmc_hosts[AU1XMMC_CONTROLLER_COUNT];