From: Ole Reinhardt <ole.reinhardt@kernelconcepts.de>
Date: Wed, 14 Dec 2005 01:03:38 +0000 (-0800)
Subject: [PATCH] fbdev: make pxafb more robust to errors with CONFIG_FB_PXA_PARAMETERS
X-Git-Tag: firefly_0821_release~38603^2~92
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=fb79ffa4ddbe3f6f30fdb8429b5bad84d25ae6ef;p=firefly-linux-kernel-4.4.55.git

[PATCH] fbdev: make pxafb more robust to errors with CONFIG_FB_PXA_PARAMETERS

pxafb.c runs into an oops if CONFIG_FB_PXA_PARAMETERS is enabled and no
parameters are set in command line.  The following patch avoids this
problem.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
index 7b4cd250bec8..9fc10b9e6f57 100644
--- a/drivers/video/pxafb.c
+++ b/drivers/video/pxafb.c
@@ -1396,7 +1396,8 @@ static struct platform_driver pxafb_driver = {
 int __devinit pxafb_setup(char *options)
 {
 # ifdef CONFIG_FB_PXA_PARAMETERS
-	strlcpy(g_options, options, sizeof(g_options));
+	if (options)
+		strlcpy(g_options, options, sizeof(g_options));
 # endif
 	return 0;
 }