linux-kernel - [PATCH 17/21] fbcon: Move more code into fbcon

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Date:   Mon, 31 Jan 2022 22:05:48 +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>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Du Cheng <ducheng2@...il.com>, Claudio Suarez <cssk@...-c.es>
Subject: [PATCH 17/21] fbcon: Move more code into fbcon_release

con2fb_release_oldinfo() has a bunch more kfree() calls than
fbcon_exit(), but since kfree() on NULL is harmless doing that in both
places should be ok. This is also a bit more symmetric now again with
fbcon_open also allocating the fbcon_ops structure.

Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
Cc: Daniel Vetter <daniel@...ll.ch>
Cc: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Du Cheng <ducheng2@...il.com>
Cc: Claudio Suarez <cssk@...-c.es>
---
 drivers/video/fbdev/core/fbcon.c | 33 +++++++++++++-------------------
 1 file changed, 13 insertions(+), 20 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index e5e8aaf6f60d..5c14e24d14a1 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -688,6 +688,18 @@ static void fbcon_release(struct fb_info *info)
 	unlock_fb_info(info);
 
 	module_put(info->fbops->owner);
+
+	if (info->fbcon_par) {
+		struct fbcon_ops *ops = info->fbcon_par;
+
+		fbcon_del_cursor_work(info);
+		kfree(ops->cursor_state.mask);
+		kfree(ops->cursor_data);
+		kfree(ops->cursor_src);
+		kfree(ops->fontbuffer);
+		kfree(info->fbcon_par);
+		info->fbcon_par = NULL;
+	}
 }
 
 static int fbcon_open(struct fb_info *info)
@@ -741,18 +753,10 @@ static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 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;
 
 	fbcon_release(oldinfo);
 
-	fbcon_del_cursor_work(oldinfo);
-	kfree(ops->cursor_state.mask);
-	kfree(ops->cursor_data);
-	kfree(ops->cursor_src);
-	kfree(ops->fontbuffer);
-	kfree(oldinfo->fbcon_par);
-	oldinfo->fbcon_par = NULL;
 	/*
 	  If oldinfo and newinfo are driving the same hardware,
 	  the fb_release() method of oldinfo may attempt to
@@ -3335,19 +3339,8 @@ static void fbcon_exit(void)
 			}
 		}
 
-		if (mapped) {
-			if (info->fbcon_par) {
-				struct fbcon_ops *ops = info->fbcon_par;
-
-				fbcon_del_cursor_work(info);
-				kfree(ops->cursor_src);
-				kfree(ops->cursor_state.mask);
-				kfree(info->fbcon_par);
-				info->fbcon_par = NULL;
-			}
-
+		if (mapped)
 			fbcon_release(info);
-		}
 	}
 }
 
-- 
2.33.0