From patchwork Mon Jan 22 11:03:39 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: 765057 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 89994405C2; Mon, 22 Jan 2024 11:04:55 +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=1705921495; cv=none; b=EeJEBrhr9mydUmrEkOQFNOyJQ6r5Tr6PE3mhXjAQ4B2jfe8aiY65OzX3cV8X03ejQxGTbnEIw/IhDdxbNE6aC5nD30uyM1pFLc0h2cXleY3hNr0RIj063815bc6WIaupSnen4ZmlKDf80qc6or8volpXJQmvUtpCY4hx+iJ+U2k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705921495; c=relaxed/simple; bh=nvYd6isOoXNLl9Y7Tt4RQvNbFL1i4ad9TROebYx41cg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=O6NHkWgydhHkSjJ14nXh1JVM46dz8iA2+jNHmSHv69nrKrV7vBKiJ8Sx9oA3hH/uOWQd312GFRzhQrdd3wILHF3gKIavxb0PDaR2CaSY2JUxGscw5I9c+icIjpwLsjRxbIKSKalkyg9ROBrtK2McUWzWg1bpNczADuoQAATNLOo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gvjcuxmP; 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="gvjcuxmP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5FDCBC43399; Mon, 22 Jan 2024 11:04:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705921495; bh=nvYd6isOoXNLl9Y7Tt4RQvNbFL1i4ad9TROebYx41cg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gvjcuxmPWnpQraJHKhPFKv/geE4KgahFZ1YiykUbAHUeIrByN6wKr6SlFOynAyUSh AzEPoCIhVvDj3EAvtcYaJ/D8oICwzTOj1H2V5luw2F+j50ePj6Wy0qhhGN+AMHEwWu LP0XKdlHS69zC5b5/tMqmMGU61953wKeBFTeUe0rl+v/gu49V6D4ITu3G7aznCMx4+ gOvZa96zkCf9WXQ8SsUmLJcXteu7taTPO4xnsvy9htYCtH7nZZtVa7hBmMr31wrWNv 40p1psXvU/wuW2vZ3MGrDgs/luIShFdqnhdA5vj2rVMGJ4MDO0kGY40cVhEVf/S2ST kukmJ1smWI+hQ== From: "Jiri Slaby (SUSE)" To: gregkh@linuxfoundation.org Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, "Jiri Slaby (SUSE)" , Helge Deller , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH v2 25/47] tty: vt: sanitize consw::con_putc() parameters Date: Mon, 22 Jan 2024 12:03:39 +0100 Message-ID: <20240122110401.7289-26-jirislaby@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240122110401.7289-1-jirislaby@kernel.org> References: <20240122110401.7289-1-jirislaby@kernel.org> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Make parameters of consw::con_putc() saner: * x and y are unsigned now, as they cannot be negative, and * ca is made u16, as it is composed of two 8bit values (character and attribute). See the con_putcs() hook, u16/ushort is worked on there. And document the hook. Signed-off-by: Jiri Slaby (SUSE) Cc: Helge Deller Cc: linux-fbdev@vger.kernel.org Cc: dri-devel@lists.freedesktop.org --- drivers/video/console/dummycon.c | 6 ++++-- drivers/video/console/newport_con.c | 4 ++-- include/linux/console.h | 5 ++++- 3 files changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c index 0a69d5c216ee..1874beed0325 100644 --- a/drivers/video/console/dummycon.c +++ b/drivers/video/console/dummycon.c @@ -50,7 +50,8 @@ void dummycon_unregister_output_notifier(struct notifier_block *nb) raw_notifier_chain_unregister(&dummycon_output_nh, nb); } -static void dummycon_putc(struct vc_data *vc, int c, int ypos, int xpos) +static void dummycon_putc(struct vc_data *vc, u16 c, unsigned int y, + unsigned int x) { WARN_CONSOLE_UNLOCKED(); @@ -84,7 +85,8 @@ static int dummycon_blank(struct vc_data *vc, int blank, int mode_switch) return 1; } #else -static void dummycon_putc(struct vc_data *vc, int c, int ypos, int xpos) { } +static void dummycon_putc(struct vc_data *vc, u16 c, unsigned int y, + unsigned int x) { } static void dummycon_putcs(struct vc_data *vc, const unsigned short *s, int count, int ypos, int xpos) { } static int dummycon_blank(struct vc_data *vc, int blank, int mode_switch) diff --git a/drivers/video/console/newport_con.c b/drivers/video/console/newport_con.c index 55c6106b3507..9b5c0118873e 100644 --- a/drivers/video/console/newport_con.c +++ b/drivers/video/console/newport_con.c @@ -367,8 +367,8 @@ static void newport_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, } } -static void newport_putc(struct vc_data *vc, int charattr, int ypos, - int xpos) +static void newport_putc(struct vc_data *vc, u16 charattr, unsigned int ypos, + unsigned int xpos) { unsigned char *p; diff --git a/include/linux/console.h b/include/linux/console.h index 8fd96a5fca5f..92d57e5b3009 100644 --- a/include/linux/console.h +++ b/include/linux/console.h @@ -39,6 +39,8 @@ enum vc_intensity; * @con_init: initialize the console on @vc. @init is true for the very first * call on this @vc. * @con_clear: erase @count characters at [@x, @y] on @vc. @count >= 1. + * @con_putc: emit one character with attributes @ca to [@x, @y] on @vc. + * (optional -- @con_putcs would be called instead) * @con_scroll: move lines from @top to @bottom in direction @dir by @lines. * Return true if no generic handling should be done. * Invoked by csi_M and printing to the console. @@ -53,7 +55,8 @@ struct consw { void (*con_deinit)(struct vc_data *vc); void (*con_clear)(struct vc_data *vc, unsigned int y, unsigned int x, unsigned int count); - void (*con_putc)(struct vc_data *vc, int c, int ypos, int xpos); + void (*con_putc)(struct vc_data *vc, u16 ca, unsigned int y, + unsigned int x); void (*con_putcs)(struct vc_data *vc, const unsigned short *s, int count, int ypos, int xpos); void (*con_cursor)(struct vc_data *vc, int mode);