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>
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index a52f166..c289916 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1351,6 +1351,11 @@
struct spi_master *master = spi->master;
struct spi_transfer *xfer;
+ 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