[PATCH] backlight: l4f00242t03: Add check for spi_setup

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 <redacted>
---
 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..a4e27adee8ac 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 ret;