spi: dw-mid: clear ongoing DMA transfers on timeout

This patch shuts up any ongoing DMA transfer in case of error.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c
index 3729cdd..e614190 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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 {