2 files changed, 5 insertions, 0 deletions

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 75d0ecbce10c..cd6dab34ba54 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -336,6 +336,9 @@ static void sdhci_transfer_pio(struct sdhci_host *host)
                 mask = ~0;
 
         while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
+                if (host->quirks & SDHCI_QUIRK_PIO_NEEDS_DELAY)
+                        udelay(100);
+
                 if (host->data->flags & MMC_DATA_READ)
                         sdhci_read_block_pio(host);
                 else
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index b9bc622735ba..c5ce9ee1a1bc 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -220,6 +220,8 @@ struct sdhci_host {
 #define SDHCI_QUIRK_INVERTED_WRITE_PROTECT              (1<<16)
 /* Controller has nonstandard clock management */
 #define SDHCI_QUIRK_NONSTANDARD_CLOCK                   (1<<17)
+/* Controller does not like fast PIO transfers */
+#define SDHCI_QUIRK_PIO_NEEDS_DELAY                     (1<<18)
 
         int                     irq;            /* Device IRQ */
         void __iomem *          ioaddr;         /* Mapped address */