spi: spi-fsl-spi: Return an error code in fsl_spi_do_one_msg()

Since commit c592becbe704127 ("spi: fsl-(e)spi: migrate to generic master
queueing") the function fsl_spi_do_one_msg() is not void anymore, so return
an error code to avoid the following buid warning:

   drivers/spi/spi-fsl-spi.c: In function 'fsl_spi_do_one_msg':
>> drivers/spi/spi-fsl-spi.c:374:4: warning: 'return' with no value, in function returning non-void [-Wreturn-type]
       return;
       ^

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
index 6b94428a0223..5e02c1f3e145 100644
--- a/drivers/spi/spi-fsl-spi.c
+++ b/drivers/spi/spi-fsl-spi.c
@@ -371,7 +371,7 @@ static int fsl_spi_do_one_msg(struct spi_master *master,
                         status = -EINVAL;
                         dev_err(&spi->dev,
                                 "bits_per_word/speed_hz should be same for the same SPI transfer\n");
-                        return;
+                        return -EINVAL;
                 }
         }