1 files changed, 12 insertions, 3 deletions

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index d336a1d65dc7..eb41391e06e9 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -679,7 +679,15 @@ static void mmc_idle_cards(struct mmc_host *host)
 }
 
 /*
- * Apply power to the MMC stack.
+ * Apply power to the MMC stack.  This is a two-stage process.
+ * First, we enable power to the card without the clock running.
+ * We then wait a bit for the power to stabilise.  Finally,
+ * enable the bus drivers and clock to the card.
+ *
+ * We must _NOT_ enable the clock prior to power stablising.
+ *
+ * If a host does all the power sequencing itself, ignore the
+ * initial MMC_POWER_UP stage.
  */
 static void mmc_power_up(struct mmc_host *host)
 {
@@ -932,8 +940,9 @@ static void mmc_read_scrs(struct mmc_host *host)
 
                 sg_init_one(&sg, (u8*)card->raw_scr, 8);
 
-                err = mmc_wait_for_req(host, &mrq);
-                if (err != MMC_ERR_NONE) {
+                mmc_wait_for_req(host, &mrq);
+
+                if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
                         mmc_card_set_dead(card);
                         continue;
                 }