linux-kernel - [PATCH 2/3] fbdev: sbuslib: remove unused FBIOSCURSOR32 helper

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Date:   Fri, 18 Sep 2020 12:09:05 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     linux-fbdev@...r.kernel.org,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     dri-devel@...ts.freedesktop.org, hch@....de,
        linux-kernel@...r.kernel.org,
        "David S . Miller" <davem@...emloft.net>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 2/3] fbdev: sbuslib: remove unused FBIOSCURSOR32 helper

No driver implements FBIOSCURSOR, so this function has no purpose
and can be removed. Apparently it was added in linux-2.1.44 to handle
compatibility for drivers/sbus/char/sunfb.c but lost its purpose when
that driver got rewritten in linux-2.5.63.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/video/fbdev/sbuslib.c | 29 +----------------------------
 1 file changed, 1 insertion(+), 28 deletions(-)

diff --git a/drivers/video/fbdev/sbuslib.c b/drivers/video/fbdev/sbuslib.c
index 01a7110e61a7..f728db9bcff8 100644
--- a/drivers/video/fbdev/sbuslib.c
+++ b/drivers/video/fbdev/sbuslib.c
@@ -214,32 +214,6 @@ static int fbiogetputcmap(struct fb_info *info, unsigned int cmd, unsigned long
 			(unsigned long)p);
 }
 
-static int fbiogscursor(struct fb_info *info, unsigned long arg)
-{
-	struct fbcursor __user *p = compat_alloc_user_space(sizeof(*p));
-	struct fbcursor32 __user *argp =  (void __user *)arg;
-	compat_uptr_t addr;
-	int ret;
-
-	ret = copy_in_user(p, argp,
-			      2 * sizeof (short) + 2 * sizeof(struct fbcurpos));
-	ret |= copy_in_user(&p->size, &argp->size, sizeof(struct fbcurpos));
-	ret |= copy_in_user(&p->cmap, &argp->cmap, 2 * sizeof(int));
-	ret |= get_user(addr, &argp->cmap.red);
-	ret |= put_user(compat_ptr(addr), &p->cmap.red);
-	ret |= get_user(addr, &argp->cmap.green);
-	ret |= put_user(compat_ptr(addr), &p->cmap.green);
-	ret |= get_user(addr, &argp->cmap.blue);
-	ret |= put_user(compat_ptr(addr), &p->cmap.blue);
-	ret |= get_user(addr, &argp->mask);
-	ret |= put_user(compat_ptr(addr), &p->mask);
-	ret |= get_user(addr, &argp->image);
-	ret |= put_user(compat_ptr(addr), &p->image);
-	if (ret)
-		return -EFAULT;
-	return info->fbops->fb_ioctl(info, FBIOSCURSOR, (unsigned long)p);
-}
-
 int sbusfb_compat_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
 {
 	switch (cmd) {
@@ -248,6 +222,7 @@ int sbusfb_compat_ioctl(struct fb_info *info, unsigned int cmd, unsigned long ar
 	case FBIOGATTR:
 	case FBIOSVIDEO:
 	case FBIOGVIDEO:
+	case FBIOSCURSOR32:
 	case FBIOGCURSOR32:	/* This is not implemented yet.
 				   Later it should be converted... */
 	case FBIOSCURPOS:
@@ -258,8 +233,6 @@ int sbusfb_compat_ioctl(struct fb_info *info, unsigned int cmd, unsigned long ar
 		return fbiogetputcmap(info, cmd, arg);
 	case FBIOGETCMAP32:
 		return fbiogetputcmap(info, cmd, arg);
-	case FBIOSCURSOR32:
-		return fbiogscursor(info, arg);
 	default:
 		return -ENOIOCTLCMD;
 	}
-- 
2.27.0