Add i/o completion timeout for DMA and PIO modes.
Signed-off-by: Andy Gross <andy.gross@xxxxxxxxxx>
Signed-off-by: Varadarajan Narayanan <varada@xxxxxxxxxxxxxx>
---
drivers/spi/spi-qup.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index abe799b..fdd34c3 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -331,8 +331,10 @@ static void spi_qup_dma_terminate(struct spi_master *master,
dmaengine_terminate_all(master->dma_rx);
}
-static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer)
+static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
+ unsigned long timeout)
{
+ struct spi_qup *qup = spi_master_get_devdata(master);
dma_async_tx_callback rx_done = NULL, tx_done = NULL;
int ret;
@@ -357,10 +359,14 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer)
dma_async_issue_pending(master->dma_tx);
}
+ if (!wait_for_completion_timeout(&qup->done, timeout))
+ return -ETIMEDOUT;
+
return 0;
}
-static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer)
+static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
+ unsigned long timeout)
{
struct spi_qup *qup = spi_master_get_devdata(master);
int ret;
@@ -379,6 +385,9 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer)
spi_qup_fifo_write(qup, xfer);
+ if (!wait_for_completion_timeout(&qup->done, timeout))
+ return -ETIMEDOUT;
+
return 0;
}
@@ -632,9 +641,9 @@ static int spi_qup_transfer_one(struct spi_master *master,
spin_unlock_irqrestore(&controller->lock, flags);
if (spi_qup_is_dma_xfer(controller->mode))
- ret = spi_qup_do_dma(master, xfer);
+ ret = spi_qup_do_dma(master, xfer, timeout);
else
- ret = spi_qup_do_pio(master, xfer);
+ ret = spi_qup_do_pio(master, xfer, timeout);
if (ret)
goto exit;
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
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