This patch shuts up any ongoing DMA transfer in case of error.
Signed-off-by: Andy Shevchenko <[email protected]>
---
drivers/spi/spi-dw-mid.c | 13 +++++++++++++
drivers/spi/spi-dw.c | 3 +++
drivers/spi/spi-dw.h | 1 +
3 files changed, 17 insertions(+)
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c
index 3729cdd..e614190 100644
--- a/drivers/spi/spi-dw-mid.c
+++ b/drivers/spi/spi-dw-mid.c
@@ -270,11 +270,24 @@ static int mid_spi_dma_transfer(struct dw_spi *dws)
return 0;
}
+static void mid_spi_dma_stop(struct dw_spi *dws)
+{
+ if (test_bit(TX_BUSY, &dws->dma_chan_busy)) {
+ dmaengine_terminate_all(dws->txchan);
+ clear_bit(TX_BUSY, &dws->dma_chan_busy);
+ }
+ if (test_bit(RX_BUSY, &dws->dma_chan_busy)) {
+ dmaengine_terminate_all(dws->rxchan);
+ clear_bit(RX_BUSY, &dws->dma_chan_busy);
+ }
+}
+
static struct dw_spi_dma_ops mid_dma_ops = {
.dma_init = mid_spi_dma_init,
.dma_exit = mid_spi_dma_exit,
.dma_setup = mid_spi_dma_setup,
.dma_transfer = mid_spi_dma_transfer,
+ .dma_stop = mid_spi_dma_stop,
};
#endif
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index c7c2fcc..d53cffe 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -432,6 +432,9 @@ static void dw_spi_handle_err(struct spi_master *master,
{
struct dw_spi *dws = spi_master_get_devdata(master);
+ if (dws->dma_mapped)
+ dws->dma_ops->dma_stop(dws);
+
spi_reset_chip(dws);
}
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index 7351692..7f130bd 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -93,6 +93,7 @@ struct dw_spi_dma_ops {
void (*dma_exit)(struct dw_spi *dws);
int (*dma_setup)(struct dw_spi *dws);
int (*dma_transfer)(struct dw_spi *dws);
+ void (*dma_stop)(struct dw_spi *dws);
};
struct dw_spi {
--
2.1.4
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