[PATCH] backlight: pcf50633: pdata may be a null pointer, null pointer dereference cause crash
From: Wenjia Zhao <hidden>
Date: 2021-02-01 14:46:12
Also in:
dri-devel, lkml
Subsystem:
backlight class/subsystem, framebuffer layer, the rest · Maintainers:
Lee Jones, Daniel Thompson, Jingoo Han, Helge Deller, Linus Torvalds
Signed-off-by: Wenjia Zhao <redacted> --- drivers/video/backlight/pcf50633-backlight.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/video/backlight/pcf50633-backlight.c b/drivers/video/backlight/pcf50633-backlight.c
index 540dd338..43267af 100644
--- a/drivers/video/backlight/pcf50633-backlight.c
+++ b/drivers/video/backlight/pcf50633-backlight.c@@ -127,7 +127,8 @@ static int pcf50633_bl_probe(struct platform_device *pdev) platform_set_drvdata(pdev, pcf_bl); - pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDDIM, pdata->ramp_time); + if (pdata) + pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDDIM, pdata->ramp_time); /* * Should be different from bl_props.brightness, so we do not exit
--
2.7.4