[PATCH] spi: Limit the spi device max speed to controller's max speed

[Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>]

Make sure the max_speed_hz of spi_device does not override
the max_speed_hz of controller.

Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
---
 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 cd3c395b4e90..51d7c004fbab 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -3378,7 +3378,8 @@ int spi_setup(struct spi_device *spi)
 	if (status)
 		return status;
 
-	if (!spi->max_speed_hz)
+	if (!spi->max_speed_hz ||
+	    spi->max_speed_hz > spi->controller->max_speed_hz)
 		spi->max_speed_hz = spi->controller->max_speed_hz;
 
 	mutex_lock(&spi->controller->io_mutex);
-- 
2.25.1