Add i/o completion timeout for DMA and PIO modes.
Signed-off-by: Andy Gross <andy.gr...@linaro.org>
Signed-off-by: Varadarajan Narayanan <var...@codeaurora.org>
---
drivers/spi/spi-qup.c | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index abe799b..92922b6 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -331,7 +331,8 @@ 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)
{
dma_async_tx_callback rx_done = NULL, tx_done = NULL;
int ret;
@@ -357,10 +358,17 @@ static int spi_qup_do_dma(struct spi_master *master,
struct spi_transfer *xfer)
dma_async_issue_pending(master->dma_tx);
}
+ if (rx_done && !wait_for_completion_timeout(&qup->done, timeout))
+ return -ETIMEDOUT;
+
+ if (tx_done && !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 +387,9 @@ 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 +643,9 @@ 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
