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Diffstat (limited to 'include/linux/spi/spi-mem.h')
-rw-r--r--include/linux/spi/spi-mem.h5
1 files changed, 2 insertions, 3 deletions
diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h
index 0cfbb1ad8d96..7195fbc234aa 100644
--- a/include/linux/spi/spi-mem.h
+++ b/include/linux/spi/spi-mem.h
@@ -81,8 +81,8 @@ enum spi_mem_data_dir {
* @data.dir: direction of the transfer
* @data.nbytes: number of data bytes to send/receive. Can be zero if the
* operation does not involve transferring data
- * @data.buf.in: input buffer
- * @data.buf.out: output buffer
+ * @data.buf.in: input buffer (must be DMA-able)
+ * @data.buf.out: output buffer (must be DMA-able)
*/
struct spi_mem_op {
struct {
@@ -105,7 +105,6 @@ struct spi_mem_op {
u8 buswidth;
enum spi_mem_data_dir dir;
unsigned int nbytes;
- /* buf.{in,out} must be DMA-able. */
union {
void *in;
const void *out;