diff options
Diffstat (limited to 'drivers/spi/spi-bcm2835.c')
| -rw-r--r-- | drivers/spi/spi-bcm2835.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c index 3a9b2187787a..f87a023a445a 100644 --- a/drivers/spi/spi-bcm2835.c +++ b/drivers/spi/spi-bcm2835.c @@ -895,15 +895,17 @@ static int bcm2835_spi_prepare_message(struct spi_master *master, u32 cs = bcm2835_rd(bs, BCM2835_SPI_CS); int ret; - /* - * DMA transfers are limited to 16 bit (0 to 65535 bytes) by the SPI HW - * due to DLEN. Split up transfers (32-bit FIFO aligned) if the limit is - * exceeded. - */ - ret = spi_split_transfers_maxsize(master, msg, 65532, - GFP_KERNEL | GFP_DMA); - if (ret) - return ret; + if (master->can_dma) { + /* + * DMA transfers are limited to 16 bit (0 to 65535 bytes) by + * the SPI HW due to DLEN. Split up transfers (32-bit FIFO + * aligned) if the limit is exceeded. + */ + ret = spi_split_transfers_maxsize(master, msg, 65532, + GFP_KERNEL | GFP_DMA); + if (ret) + return ret; + } cs &= ~(BCM2835_SPI_CS_CPOL | BCM2835_SPI_CS_CPHA); |