mmc: mmc: Hold re-tuning in mmc_sleep()

The sleep command is issued after deselecting the
card, but re-tuning won't work on a deselected card
so re-tuning must be held.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index f36c76f..fd41b28 100644 (file)
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -21,6 +21,7 @@
 #include <linux/mmc/mmc.h>
 
 #include "core.h"
+#include "host.h"
 #include "bus.h"
 #include "mmc_ops.h"
 #include "sd_ops.h"
@@ -1511,9 +1512,12 @@ static int mmc_sleep(struct mmc_host *host)
        unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
        int err;
 
+       /* Re-tuning can't be done once the card is deselected */
+       mmc_retune_hold(host);
+
        err = mmc_deselect_cards(host);
        if (err)
-               return err;
+               goto out_release;
 
        cmd.opcode = MMC_SLEEP_AWAKE;
        cmd.arg = card->rca << 16;
@@ -1534,7 +1538,7 @@ static int mmc_sleep(struct mmc_host *host)
 
        err = mmc_wait_for_cmd(host, &cmd, 0);
        if (err)
-               return err;
+               goto out_release;
 
        /*
         * If the host does not wait while the card signals busy, then we will
@@ -1545,6 +1549,8 @@ static int mmc_sleep(struct mmc_host *host)
        if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
                mmc_delay(timeout_ms);
 
+out_release:
+       mmc_retune_release(host);
        return err;
 }