linux-kernel - [PATCH 11/20] amifb: get rid of pointless access

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Date:   Sun, 10 May 2020 00:45:48 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     linux-kernel@...r.kernel.org
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: [PATCH 11/20] amifb: get rid of pointless access_ok() calls

From: Al Viro <viro@...iv.linux.org.uk>

addresses passed only to get_user() and put_user()

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 drivers/video/fbdev/amifb.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/video/fbdev/amifb.c b/drivers/video/fbdev/amifb.c
index 20e03e00b66d..6062104f3afb 100644
--- a/drivers/video/fbdev/amifb.c
+++ b/drivers/video/fbdev/amifb.c
@@ -1855,8 +1855,6 @@ static int ami_get_var_cursorinfo(struct fb_var_cursorinfo *var,
 	var->yspot = par->crsr.spot_y;
 	if (size > var->height * var->width)
 		return -ENAMETOOLONG;
-	if (!access_ok(data, size))
-		return -EFAULT;
 	delta = 1 << par->crsr.fmode;
 	lspr = lofsprite + (delta << 1);
 	if (par->bplcon0 & BPC0_LACE)
@@ -1935,8 +1933,6 @@ static int ami_set_var_cursorinfo(struct fb_var_cursorinfo *var,
 		return -EINVAL;
 	if (!var->height)
 		return -EINVAL;
-	if (!access_ok(data, var->width * var->height))
-		return -EFAULT;
 	delta = 1 << fmode;
 	lofsprite = shfsprite = (u_short *)spritememory;
 	lspr = lofsprite + (delta << 1);
-- 
2.11.0