diff options
| author |   Sanchayan Maity <maitysanchayan@gmail.com> | 2016-11-17 17:46:48 +0530 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2016-11-18 12:03:32 +0000 |
| commit | 9811430465fccae17862213d07eba017c149eb9c (patch) | |
| tree | 0a2ecb559e2122d95c36a6f612e7e0817c12a1d1 /drivers/spi | |
| parent | spi: spi-fsl-dspi: Add DMA support for Vybrid (diff) | |
| download | linux-dev-9811430465fccae17862213d07eba017c149eb9c.tar.xz linux-dev-9811430465fccae17862213d07eba017c149eb9c.zip | |
spi: spi-fsl-dspi: Fix SPI transfer issue when using multiple SPI_IOC_MESSAGE
Current DMA implementation had a bug where the DMA transfer would
exit the loop in dspi_transfer_one_message after the completion of
a single transfer. This results in a multi message transfer submitted
with SPI_IOC_MESSAGE to terminate incorrectly without an error.
Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-fsl-dspi.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index bc64700b514d..b1ee1f521ba0 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -714,7 +714,7 @@ static int dspi_transfer_one_message(struct spi_master *master, SPI_RSER_TFFFE | SPI_RSER_TFFFD | SPI_RSER_RFDFE | SPI_RSER_RFDFD); status = dspi_dma_xfer(dspi); - goto out; + break; default: dev_err(&dspi->pdev->dev, "unsupported trans_mode %u\n", trans_mode); @@ -722,9 +722,13 @@ static int dspi_transfer_one_message(struct spi_master *master, goto out; } - if (wait_event_interruptible(dspi->waitq, dspi->waitflags)) - dev_err(&dspi->pdev->dev, "wait transfer complete fail!\n"); - dspi->waitflags = 0; + if (trans_mode != DSPI_DMA_MODE) { + if (wait_event_interruptible(dspi->waitq, + dspi->waitflags)) + dev_err(&dspi->pdev->dev, + "wait transfer complete fail!\n"); + dspi->waitflags = 0; + } if (transfer->delay_usecs) udelay(transfer->delay_usecs); |