Use GFP_DMA in order to ensure that the memory we allocate for transfers
in spi_write_then_read() can be DMAed. On most platforms this will have
no effect.
Signed-off-by: Mark Brown <broo...@opensource.wolfsonmicro.com>
---
drivers/spi/spi.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 19ee901..14d0fba 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1656,7 +1656,8 @@ int spi_write_then_read(struct spi_device *spi,
* using the pre-allocated buffer or the transfer is too large.
*/
if ((n_tx + n_rx) > SPI_BUFSIZ || !mutex_trylock(&lock)) {
- local_buf = kmalloc(max((unsigned)SPI_BUFSIZ, n_tx + n_rx),
GFP_KERNEL);
+ local_buf = kmalloc(max((unsigned)SPI_BUFSIZ, n_tx + n_rx),
+ GFP_KERNEL | GFP_DMA);
if (!local_buf)
return -ENOMEM;
} else {
--
1.7.10.4
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