sdhci: Add quirk for controllers with no end-of-busy IRQ

The Samsung SDHCI (and FSL eSDHC) controller block seems to fail
to generate an INT_DATA_END after the transfer has completed and
the bus busy state finished.

Changes in e809517f6fa5803a5a1cd56026f0e2190fc13d5c to use the
new busy method are the cause of the behaviour change.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index f52f3053ed92..accb592764ed 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1291,8 +1291,11 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
                 if (host->cmd->data)
                         DBG("Cannot wait for busy signal when also "
                                 "doing a data transfer");
-                else
+                else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ))
                         return;
+
+                /* The controller does not support the end-of-busy IRQ,
+                 * fall through and take the SDHCI_INT_RESPONSE */
         }
 
         if (intmask & SDHCI_INT_RESPONSE)