mmc: dw_mmc: fix mmc_test by not sending abort for DRTO/EBE errors

The STOP command can terminate a data transfer between a memory card and
mmc controller.

As show in Synopsys DesignWare Cores Mobile Storage Host Databook:
Data timeout and Data end-bit error will terminate further data transfer
by mmc controller. So we should not send abort command to terminate a
data transfer again if we got DRTO and EBE interrupt.

After this patch, all mmc_test cases can pass on RK3288-Pink2 board.

Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Tested-by: Doug Anderson <dianders@chromium.org>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index f30ef69..bed0f94 100644 (file)
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1534,7 +1534,10 @@ static void dw_mci_tasklet_func(unsigned long priv)
                        if (test_and_clear_bit(EVENT_DATA_ERROR,
                                               &host->pending_events)) {
                                dw_mci_stop_dma(host);
-                               send_stop_abort(host, data);
+                               if (data->stop ||
+                                   !(host->data_status & (SDMMC_INT_DRTO |
+                                                          SDMMC_INT_EBE)))
+                                       send_stop_abort(host, data);
                                state = STATE_DATA_ERROR;
                                break;
                        }
@@ -1561,7 +1564,10 @@ static void dw_mci_tasklet_func(unsigned long priv)
                        if (test_and_clear_bit(EVENT_DATA_ERROR,
                                               &host->pending_events)) {
                                dw_mci_stop_dma(host);
-                               send_stop_abort(host, data);
+                               if (data->stop ||
+                                   !(host->data_status & (SDMMC_INT_DRTO |
+                                                          SDMMC_INT_EBE)))
+                                       send_stop_abort(host, data);
                                state = STATE_DATA_ERROR;
                                break;
                        }