[PATCH v2] backlight: l4f00242t03: Add check for spi_setup

[Chen Ni]

Add check for the return value of spi_setup() and return the error
if it fails in order to catch the error.

Signed-off-by: Chen Ni <nic...@iscas.ac.cn>
---
Changelog:

v1 -> v2:

1. Use dev_err_probe() to match other error paths
---
 drivers/video/backlight/l4f00242t03.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/video/backlight/l4f00242t03.c 
b/drivers/video/backlight/l4f00242t03.c
index dd0874f8c7ff..4175a4603071 100644
--- a/drivers/video/backlight/l4f00242t03.c
+++ b/drivers/video/backlight/l4f00242t03.c
@@ -166,6 +166,7 @@ static const struct lcd_ops l4f_ops = {
 static int l4f00242t03_probe(struct spi_device *spi)
 {
        struct l4f00242t03_priv *priv;
+       int ret;
 
        priv = devm_kzalloc(&spi->dev, sizeof(struct l4f00242t03_priv),
                                GFP_KERNEL);
@@ -174,7 +175,9 @@ static int l4f00242t03_probe(struct spi_device *spi)
 
        spi_set_drvdata(spi, priv);
        spi->bits_per_word = 9;
-       spi_setup(spi);
+       ret = spi_setup(spi);
+       if (ret < 0)
+               return dev_err_probe(&spi->dev, ret, "Unable to setup spi.\n");
 
        priv->spi = spi;
 
-- 
2.25.1