Hold re-tuning during erase commands to prevent
it from conflicting with the sequence of commands.

Signed-off-by: Adrian Hunter <adrian.hun...@intel.com>
---
 drivers/mmc/core/core.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 2c10fb9..3da5fa8 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1956,6 +1956,10 @@ static int mmc_do_erase(struct mmc_card *card, unsigned 
int from,
        unsigned long timeout;
        int err;
 
+       err = mmc_retune_and_hold(card->host);
+       if (err)
+               return err;
+
        /*
         * qty is used to calculate the erase timeout which depends on how many
         * erase groups (or allocation units in SD terminology) are affected.
@@ -2059,6 +2063,7 @@ static int mmc_do_erase(struct mmc_card *card, unsigned 
int from,
        } while (!(cmd.resp[0] & R1_READY_FOR_DATA) ||
                 (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG));
 out:
+       mmc_retune_release(card->host);
        return err;
 }
 
-- 
1.9.1

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