From: LABBE Corentin <clabbe.montjoie@gmail.com>
Date: Tue, 16 Aug 2016 09:27:18 +0000 (+0200)
Subject: fbdev: ssd1307fb: fix a possible NULL dereference
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d8ed9e87e6016433b8d178728a5391ea68101bca;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

fbdev: ssd1307fb: fix a possible NULL dereference

of_match_device could return NULL, and so cause a NULL pointer
dereference later.

For fixing this problem, we use of_device_get_match_data(), this will
simplify the code a little by using a standard function for
getting the match data.

Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---

diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index 6a18bdc9fe47..2925d5ce8d3e 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c
@@ -559,8 +559,7 @@ static int ssd1307fb_probe(struct i2c_client *client,
 	par->info = info;
 	par->client = client;
 
-	par->device_info = of_match_device(ssd1307fb_of_match,
-					   &client->dev)->data;
+	par->device_info = of_device_get_match_data(&client->dev);
 
 	par->reset = of_get_named_gpio(client->dev.of_node,
 					 "reset-gpios", 0);