From patchwork Thu Jan 18 07:57:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jiri Slaby \(SUSE\)" X-Patchwork-Id: 765107 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 67C9F29429; Thu, 18 Jan 2024 07:58:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705564716; cv=none; b=FnhwBxEVFqOHmlQLRgWS2P3W9XLw2zXEKebt4t4dBC0FznSVw96Fe0WCrc3dspDovcy1qSep81WAh7s9+An7UGGEdORUIY3ML4zKREZ7K0gC0/uYbPTdXfjeXOas9ePsUqe+dVIF02FOSuV4Tjc4KioWXReXKJi/Mp8v7sfOD1I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705564716; c=relaxed/simple; bh=GJfteWjzTxl1GHc/MnJTrogtTSYg1Ifld3S8+ciqzdU=; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID: X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; b=gbsPcZL8gFyfyOv2FjCzlyIs1SoQVYFzN3TYOcwD0nXIuHFiJPGkbEH0v5tiZrZfomd3nowb0t3zjc5I5DWMM3MIh6QOlUvqt2G9F/ZKE4+Idw8MLUS0s+NQOHNR1ecEX4H8OOcNTaWG3rfMaQY3PA7SzlNQC9IqeaWyYxaFOGY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uF6c4QLy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="uF6c4QLy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3ED95C433C7; Thu, 18 Jan 2024 07:58:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705564716; bh=GJfteWjzTxl1GHc/MnJTrogtTSYg1Ifld3S8+ciqzdU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uF6c4QLy8e2Q+pq51ouFyq1TAWfULUPNKgdDuPJnZiSkDAlbyPJtqCczsOtTQIcWq Xwk23Q0H/G1yH3+rwV8jMDK324IwSmeAkwDNcnLnBXup8smQfjYCczenoIBvyS5ug/ opWyJB9SjEBWNgvb91KtU8zUErt6hrCDklP/3u6jUy/pGqwDuzAbr/NL1Z3kksxQ9h 0mCqIvBdCLJyyQKrhZ8BtvlsVnBh56B2qm8M5VcRcPuTL57t3WqbEnU5+e52foE23C ZjvXANOinKIjQWZjZcLx1dQpPuVkk1HCs7XpsauJSFdEchxLcjtZ20IkI3cng4UpSO zhnUetiiNW6bg== From: "Jiri Slaby (SUSE)" To: gregkh@linuxfoundation.org Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, "Jiri Slaby (SUSE)" , Daniel Vetter , Helge Deller , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH 18/45] tty: vt: make consw::con_debug_*() return void Date: Thu, 18 Jan 2024 08:57:29 +0100 Message-ID: <20240118075756.10541-19-jirislaby@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240118075756.10541-1-jirislaby@kernel.org> References: <20240118075756.10541-1-jirislaby@kernel.org> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The return value of con_debug_enter() and con_debug_leave() is ignored on many fronts. So just don't propagate errors (the current implementations return 0 anyway) and make the return type a void. Signed-off-by: Jiri Slaby (SUSE) Cc: Daniel Vetter Cc: Helge Deller Cc: linux-fbdev@vger.kernel.org Cc: dri-devel@lists.freedesktop.org --- drivers/tty/vt/vt.c | 21 ++++----------------- drivers/video/fbdev/core/fbcon.c | 6 ++---- include/linux/console.h | 18 ++++++------------ 3 files changed, 12 insertions(+), 33 deletions(-) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 7006889c920d..a953c3f262a5 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -4026,15 +4026,9 @@ EXPORT_SYMBOL(con_is_visible); * Called when the console is taken over by the kernel debugger, this * function needs to save the current console state, then put the console * into a state suitable for the kernel debugger. - * - * RETURNS: - * Zero on success, nonzero if a failure occurred when trying to prepare - * the console for the debugger. */ -int con_debug_enter(struct vc_data *vc) +void con_debug_enter(struct vc_data *vc) { - int ret = 0; - saved_fg_console = fg_console; saved_last_console = last_console; saved_want_console = want_console; @@ -4043,7 +4037,7 @@ int con_debug_enter(struct vc_data *vc) vc->vc_mode = KD_TEXT; console_blanked = 0; if (vc->vc_sw->con_debug_enter) - ret = vc->vc_sw->con_debug_enter(vc); + vc->vc_sw->con_debug_enter(vc); #ifdef CONFIG_KGDB_KDB /* Set the initial LINES variable if it is not already set */ if (vc->vc_rows < 999) { @@ -4073,7 +4067,6 @@ int con_debug_enter(struct vc_data *vc) } } #endif /* CONFIG_KGDB_KDB */ - return ret; } EXPORT_SYMBOL_GPL(con_debug_enter); @@ -4082,15 +4075,10 @@ EXPORT_SYMBOL_GPL(con_debug_enter); * * Restore the console state to what it was before the kernel debugger * was invoked. - * - * RETURNS: - * Zero on success, nonzero if a failure occurred when trying to restore - * the console. */ -int con_debug_leave(void) +void con_debug_leave(void) { struct vc_data *vc; - int ret = 0; fg_console = saved_fg_console; last_console = saved_last_console; @@ -4100,8 +4088,7 @@ int con_debug_leave(void) vc = vc_cons[fg_console].d; if (vc->vc_sw->con_debug_leave) - ret = vc->vc_sw->con_debug_leave(vc); - return ret; + vc->vc_sw->con_debug_leave(vc); } EXPORT_SYMBOL_GPL(con_debug_leave); diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index dd2f4617485c..d3fb98084eda 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -2243,7 +2243,7 @@ static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) return 0; } -static int fbcon_debug_enter(struct vc_data *vc) +static void fbcon_debug_enter(struct vc_data *vc) { struct fb_info *info = fbcon_info_from_console(vc->vc_num); struct fbcon_ops *ops = info->fbcon_par; @@ -2253,10 +2253,9 @@ static int fbcon_debug_enter(struct vc_data *vc) if (info->fbops->fb_debug_enter) info->fbops->fb_debug_enter(info); fbcon_set_palette(vc, color_table); - return 0; } -static int fbcon_debug_leave(struct vc_data *vc) +static void fbcon_debug_leave(struct vc_data *vc) { struct fb_info *info = fbcon_info_from_console(vc->vc_num); struct fbcon_ops *ops = info->fbcon_par; @@ -2264,7 +2263,6 @@ static int fbcon_debug_leave(struct vc_data *vc) ops->graphics = ops->save_graphics; if (info->fbops->fb_debug_leave) info->fbops->fb_debug_leave(info); - return 0; } static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch) diff --git a/include/linux/console.h b/include/linux/console.h index 38b379d6c624..93a1db5bf3b5 100644 --- a/include/linux/console.h +++ b/include/linux/console.h @@ -88,11 +88,11 @@ struct consw { * limited to, unblanking the console, loading an appropriate * palette, and allowing debugger generated output. */ - int (*con_debug_enter)(struct vc_data *vc); + void (*con_debug_enter)(struct vc_data *vc); /* * Restore the console to its pre-debug state as closely as possible. */ - int (*con_debug_leave)(struct vc_data *vc); + void (*con_debug_leave)(struct vc_data *vc); }; extern const struct consw *conswitchp; @@ -113,17 +113,11 @@ int do_unregister_con_driver(const struct consw *csw); int do_take_over_console(const struct consw *sw, int first, int last, int deflt); void give_up_console(const struct consw *sw); #ifdef CONFIG_HW_CONSOLE -int con_debug_enter(struct vc_data *vc); -int con_debug_leave(void); +void con_debug_enter(struct vc_data *vc); +void con_debug_leave(void); #else -static inline int con_debug_enter(struct vc_data *vc) -{ - return 0; -} -static inline int con_debug_leave(void) -{ - return 0; -} +static inline void con_debug_enter(struct vc_data *vc) { } +static inline void con_debug_leave(void) { } #endif /* cursor */