spi: More sanity checks for transfers

Check that transfers are non-empty and that there is a completion for
them.

Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Huang Shijie <b32955@freescale.com>

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index d4f9670b51bcbd7947b811b5f8dfab8afc711248..3ee46ffe90b47f8f36b9a747f37db2b9b95c30fe 100644 (file)
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1843,6 +1843,11 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message)
        if (list_empty(&message->transfers))
                return -EINVAL;
 
+       if (list_empty(&message->transfers))
+               return -EINVAL;
+       if (!message->complete)
+               return -EINVAL;
+
        /* Half-duplex links include original MicroWire, and ones with
         * only one data pin like SPI_3WIRE (switches direction) or where
         * either MOSI or MISO is missing.  They can also be caused by