[PATCH] spi: Remove note about transfer limit for spi_write_then_read()

[Mark Brown <broonie@kernel.org>]

Originally spi_write_then_read() used a fixed statically allocated
buffer which limited the maximum message size it could handle.  This
restriction was removed a while ago so that we could dynamically
allocate a buffer if required but the kerneldoc was not updated to
reflect this, do so.

Reported-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index c69d23379e08..a6f3f1ae72d7 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -3869,8 +3869,7 @@ static u8	*buf;
  * is zero for success, else a negative errno status code.
  * This call may only be used from a context that may sleep.
  *
- * Parameters to this routine are always copied using a small buffer;
- * portable code should never use this for more than 32 bytes.
+ * Parameters to this routine are always copied using a small buffer.
  * Performance-sensitive or bulk transfer code should instead use
  * spi_{async,sync}() calls with dma-safe buffers.
  *
-- 
2.20.1