linux-kernel - [PATCH 2/2] fbdev: ssd1307fb: check return value while setting offset

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Date:	Thu,  8 Jan 2015 08:17:59 +0000
From:	"Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:	LFBDEV <linux-fbdev@...r.kernel.org>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"Lad, Prabhakar" <prabhakar.csengg@...il.com>
Subject: [PATCH 2/2] fbdev: ssd1307fb: check return value while setting offset

this patch checks the return value of write command while
setting the display offset.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
---
 drivers/video/fbdev/ssd1307fb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index 70e3ce8..a7ecaa6 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c
@@ -342,7 +342,7 @@ static int ssd1307fb_ssd1306_init(struct ssd1307fb_par *par)
 
 	/* set display offset value */
 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_DISPLAY_OFFSET);
-	ret = ssd1307fb_write_cmd(par->client, 0x20);
+	ret = ret & ssd1307fb_write_cmd(par->client, 0x20);
 	if (ret < 0)
 		return ret;
 
-- 
1.9.1

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