# \[PATCH v2 17/24\] video: da8xx-fb: invoke platform callback safely

- Subsystems: FRAMEBUFFER LAYER, THE REST
- Maintainers: Helge Deller, Linus Torvalds
- List: linux-fbdev
- 1 message, 1 author
- Page: https://ratatoskr.run/linux-fbdev/2013/07/13465139/t

## \[PATCH v2 17/24\] video: da8xx-fb: invoke platform callback safely

- From: Darren Etheridge \<hidden\>
- Date: 2013-07-30 18:26:24 
- Message: https://ratatoskr.run/linux-fbdev/2013/07/13465139.md

```text
From: Afzal Mohammed <redacted>

Ensure that platform data is present before checking whether platform
callback is present (the one used to control backlight). So far this
was not an issue as driver was purely non-DT triggered, but now DT
support has been added.

Signed-off-by: Afzal Mohammed <redacted>
Signed-off-by: Darren Etheridge <redacted>
---
 drivers/video/da8xx-fb.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
index 1787ccc..983176a 100644
--- a/drivers/video/da8xx-fb.c
+++ b/drivers/video/da8xx-fb.c
@@ -1348,7 +1348,7 @@ static int fb_probe(struct platform_device *device)
 	par->dev = &device->dev;
 	par->lcdc_clk = fb_clk;
 	par->lcd_fck_rate = clk_get_rate(fb_clk);
-	if (fb_pdata->panel_power_ctrl) {
+	if (fb_pdata && fb_pdata->panel_power_ctrl) {
 		par->panel_power_ctrl = fb_pdata->panel_power_ctrl;
 		par->panel_power_ctrl(1);
 	}
-- 
1.7.0.4

```