linux-kernel - [PATCH v2 10/19] fbcon: Ditch error handling for con2fb_release

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Message-Id: <20220208210824.2238981-11-daniel.vetter@ffwll.ch>
Date:   Tue,  8 Feb 2022 22:08:15 +0100
From:   Daniel Vetter <daniel.vetter@...ll.ch>
To:     DRI Development <dri-devel@...ts.freedesktop.org>
Cc:     Intel Graphics Development <intel-gfx@...ts.freedesktop.org>,
        linux-fbdev@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Sam Ravnborg <sam@...nborg.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Claudio Suarez <cssk@...-c.es>, Du Cheng <ducheng2@...il.com>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Subject: [PATCH v2 10/19] fbcon: Ditch error handling for con2fb_release_oldinfo

It doesn't ever fail anymore.

Acked-by: Sam Ravnborg <sam@...nborg.org>
Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
Cc: Daniel Vetter <daniel@...ll.ch>
Cc: Thomas Zimmermann <tzimmermann@...e.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Claudio Suarez <cssk@...-c.es>
Cc: Du Cheng <ducheng2@...il.com>
Cc: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
---
 drivers/video/fbdev/core/fbcon.c | 37 +++++++++++---------------------
 1 file changed, 13 insertions(+), 24 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 3e1a3e7bf527..a60891005d44 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -739,9 +739,8 @@ static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 	return err;
 }
 
-static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
-				  struct fb_info *newinfo, int unit,
-				  int oldidx, int found)
+static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
+				   struct fb_info *newinfo)
 {
 	struct fbcon_ops *ops = oldinfo->fbcon_par;
 	int ret;
@@ -770,8 +769,6 @@ static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 				"detected unhandled fb_set_par error, "
 				"error code %d\n", ret);
 	}
-
-	return 0;
 }
 
 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
@@ -825,7 +822,7 @@ static int set_con2fb_map(int unit, int newidx, int user)
 	int oldidx = con2fb_map[unit];
 	struct fb_info *info = registered_fb[newidx];
 	struct fb_info *oldinfo = NULL;
-	int found, err = 0;
+	int found, err = 0, show_logo;
 
 	WARN_CONSOLE_UNLOCKED();
 
@@ -854,18 +851,15 @@ static int set_con2fb_map(int unit, int newidx, int user)
 	 * fbcon should release it.
 	 */
 	if (!err && oldinfo && !search_fb_in_map(oldidx))
-		err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
-					     found);
+		con2fb_release_oldinfo(vc, oldinfo, info);
 
-	if (!err) {
-		int show_logo = (fg_console == 0 && !user &&
-				 logo_shown != FBCON_LOGO_DONTSHOW);
+	show_logo = (fg_console == 0 && !user &&
+			 logo_shown != FBCON_LOGO_DONTSHOW);
 
-		if (!found)
-			fbcon_add_cursor_work(info);
-		con2fb_map_boot[unit] = newidx;
-		con2fb_init_display(vc, info, unit, show_logo);
-	}
+	if (!found)
+		fbcon_add_cursor_work(info);
+	con2fb_map_boot[unit] = newidx;
+	con2fb_init_display(vc, info, unit, show_logo);
 
 	if (!search_fb_in_map(info_idx))
 		info_idx = newidx;
@@ -2769,7 +2763,7 @@ static inline void fbcon_unbind(void) {}
 /* called with console_lock held */
 void fbcon_fb_unbind(struct fb_info *info)
 {
-	int i, new_idx = -1, ret = 0;
+	int i, new_idx = -1;
 	int idx = info->node;
 
 	WARN_CONSOLE_UNLOCKED();
@@ -2803,13 +2797,8 @@ void fbcon_fb_unbind(struct fb_info *info)
 			if (con2fb_map[i] == idx) {
 				con2fb_map[i] = -1;
 				if (!search_fb_in_map(idx)) {
-					ret = con2fb_release_oldinfo(vc_cons[i].d,
-								     info, NULL, i,
-								     idx, 0);
-					if (ret) {
-						con2fb_map[i] = idx;
-						return;
-					}
+					con2fb_release_oldinfo(vc_cons[i].d,
+							       info, NULL);
 				}
 			}
 		}
-- 
2.34.1