The STOP command can terminate a data transfer between a memory card and
mmc controller.
As show in Synopsys DesignWare Cores Mobile Stroage 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@xxxxxxxxxxxxxx>
---
Changes in v2:
- DRTO and EBE are both set, should not send abort command too,
suggested by Doug Anderson.
drivers/mmc/host/dw_mmc.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 4d2e3c2..a27048a 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1520,7 +1520,10 @@ 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;
}
@@ -1547,7 +1550,10 @@ 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;
}
--
1.8.3.2
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