linux-kernel - [PATCH 07/10] video: da8xx-fb: invoke platform callback safely

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Date:	Mon, 7 Jan 2013 10:41:18 +0530
From:	Afzal Mohammed <afzal@...com>
To:	Florian Tobias Schandinat <FlorianSchandinat@....de>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	Steffen Trumtrar <s.trumtrar@...gutronix.de>,
	Sekhar Nori <nsekhar@...com>,
	Vaibhav Hiremath <hvaibhav@...com>,
	<linux-omap@...r.kernel.org>, <linux-fbdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>, <linux-doc@...r.kernel.org>
Subject: [PATCH 07/10] video: da8xx-fb: invoke platform callback safely

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 <afzal@...com>
---
 drivers/video/da8xx-fb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
index d10479f..68ae925 100644
--- a/drivers/video/da8xx-fb.c
+++ b/drivers/video/da8xx-fb.c
@@ -1351,7 +1351,7 @@ static int __devinit 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);
 	}
-- 
1.7.9.5

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