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From: Sachin Shukla <sachin.s5@samsung.com>
To: Timur Tabi <timur@tabi.org>,
	Tomi Valkeinen <tomi.valkeinen@ti.com>,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	sachiniiitm@gmail.com
Cc: ravikant.s2@samsung.com, p.shailesh@samsung.com,
	ashish.kalra@samsung.com, vidushi.koul@samsung.com
Subject: [PATCH] Video: fbdev: Remove impossible condition.
Date: Fri, 11 Nov 2016 17:54:50 +0530	[thread overview]
Message-ID: <1478867090-2108-1-git-send-email-sachin.s5@samsung.com> (raw)

From: "Sachin Shukla" <sachin.s5@samsung.com>

xoffset and yoffset of struct fb_var_screeninfo are unsigned and so
they can never be less than 0.

Signed-off-by: Sachin Shukla <sachin.s5@samsung.com>
---
 drivers/video/fbdev/amifb.c      |    8 +++-----
 drivers/video/fbdev/fsl-diu-fb.c |    9 +--------
 2 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/drivers/video/fbdev/amifb.c b/drivers/video/fbdev/amifb.c
index 1d702e1..cc11c60 100644
--- a/drivers/video/fbdev/amifb.c
+++ b/drivers/video/fbdev/amifb.c
@@ -1484,13 +1484,11 @@ static int ami_decode_var(struct fb_var_screeninfo *var, struct amifb_par *par,
 		par->xoffset = var->xoffset;
 		par->yoffset = var->yoffset;
 		if (par->vmode & FB_VMODE_YWRAP) {
-			if (par->xoffset || par->yoffset < 0 ||
-			    par->yoffset >= par->vyres)
+			if (par->yoffset >= par->vyres)
 				par->xoffset = par->yoffset = 0;
 		} else {
-			if (par->xoffset < 0 ||
-			    par->xoffset > upx(16 << maxfmode, par->vxres - par->xres) ||
-			    par->yoffset < 0 || par->yoffset > par->vyres - par->yres)
+			if (par->xoffset > upx(16 << maxfmode, par->vxres - par->xres) ||
+			    par->yoffset > par->vyres - par->yres)
 				par->xoffset = par->yoffset = 0;
 		}
 	} else
diff --git a/drivers/video/fbdev/fsl-diu-fb.c b/drivers/video/fbdev/fsl-diu-fb.c
index fe00a07..c48a59e 100644
--- a/drivers/video/fbdev/fsl-diu-fb.c
+++ b/drivers/video/fbdev/fsl-diu-fb.c
@@ -703,12 +703,6 @@ static int fsl_diu_check_var(struct fb_var_screeninfo *var,
 	if (var->yres_virtual < var->yres)
 		var->yres_virtual = var->yres;
 
-	if (var->xoffset < 0)
-		var->xoffset = 0;
-
-	if (var->yoffset < 0)
-		var->yoffset = 0;
-
 	if (var->xoffset + info->var.xres > info->var.xres_virtual)
 		var->xoffset = info->var.xres_virtual - info->var.xres;
 
@@ -1254,8 +1248,7 @@ static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
 	    (info->var.yoffset == var->yoffset))
 		return 0;	/* No change, do nothing */
 
-	if (var->xoffset < 0 || var->yoffset < 0
-	    || var->xoffset + info->var.xres > info->var.xres_virtual
+	if (var->xoffset + info->var.xres > info->var.xres_virtual
 	    || var->yoffset + info->var.yres > info->var.yres_virtual)
 		return -EINVAL;
 
-- 
1.7.9.5

             reply	other threads:[~2016-11-11 12:27 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-11 12:24 Sachin Shukla [this message]
2016-11-11 14:49 ` Timur Tabi
     [not found] ` <CGME20170208153734epcas5p1f56516b023b93b77f4bc43d1ac997769@epcas5p1.samsung.com>
2017-02-08 15:37   ` Bartlomiej Zolnierkiewicz
  -- strict thread matches above, loose matches on Subject: below --
2016-11-11 11:46 Shailendra Verma

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