From: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
To: gregkh@linuxfoundation.org
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
"Jiri Slaby (SUSE)" <jirislaby@kernel.org>,
Helge Deller <deller@gmx.de>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-parisc@vger.kernel.org
Subject: [PATCH v2 22/47] tty: vt: remove checks for count in consw::con_clear() implementations
Date: Mon, 22 Jan 2024 12:03:36 +0100 [thread overview]
Message-ID: <20240122110401.7289-23-jirislaby@kernel.org> (raw)
In-Reply-To: <20240122110401.7289-1-jirislaby@kernel.org>
'count' in consw::con_clear() is guaranteed to be positive. csi_X() (the
only caller) takes the minimum of the vc parameter (which is at least 1)
and count of characters till the end of the line. The latter is computed
as a subtraction of vc->vc_cols (count) and vc->state.x (offset). So for
the worst case, full line, it is 1.
Therefore, there is no point in checking zero or negative values (width
is now unsigned anyway).
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-parisc@vger.kernel.org
---
drivers/video/console/mdacon.c | 3 ---
drivers/video/console/sticon.c | 3 ---
2 files changed, 6 deletions(-)
diff --git a/drivers/video/console/mdacon.c b/drivers/video/console/mdacon.c
index 1ddbb6cd5b0c..2ff2c9394d40 100644
--- a/drivers/video/console/mdacon.c
+++ b/drivers/video/console/mdacon.c
@@ -448,9 +448,6 @@ static void mdacon_clear(struct vc_data *c, unsigned int y, unsigned int x,
u16 *dest = mda_addr(x, y);
u16 eattr = mda_convert_attr(c->vc_video_erase_char);
- if (width <= 0)
- return;
-
scr_memsetw(dest, eattr, width * 2);
}
diff --git a/drivers/video/console/sticon.c b/drivers/video/console/sticon.c
index d99c2a659bfd..b1d972d9a31c 100644
--- a/drivers/video/console/sticon.c
+++ b/drivers/video/console/sticon.c
@@ -303,9 +303,6 @@ static void sticon_deinit(struct vc_data *c)
static void sticon_clear(struct vc_data *conp, unsigned int sy, unsigned int sx,
unsigned int width)
{
- if (!width)
- return;
-
sti_clear(sticon_sti, sy, sx, 1, width,
conp->vc_video_erase_char, font_data[conp->vc_num]);
}
--
2.43.0
next prev parent reply other threads:[~2024-01-22 11:04 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-22 11:03 [PATCH v2 00/47] tty: vt: cleanup and documentation Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 01/47] vgacon: inline vc_scrolldelta_helper() into vgacon_scrolldelta() Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 02/47] fbcon: make display_desc a static array in fbcon_startup() Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 07/47] tty: vt: pass vc_resize_user as a parameter Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 19/47] tty: vt: make consw::con_debug_*() return void Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 20/47] tty: vt: make init parameter of consw::con_init() a bool Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 21/47] tty: vt: sanitize arguments of consw::con_clear() Jiri Slaby (SUSE)
2024-01-22 11:03 ` Jiri Slaby (SUSE) [this message]
2024-01-22 11:03 ` [PATCH v2 24/47] tty: vt: eliminate unneeded consw::con_putc() implementations Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 25/47] tty: vt: sanitize consw::con_putc() parameters Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 27/47] consoles: use if instead of switch-case in consw::con_cursor() Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 28/47] fbdev/core: simplify cursor_state setting in fbcon_ops::cursor() Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 29/47] tty: vt: remove CM_* constants Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 30/47] tty: vt: make consw::con_switch() return a bool Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 31/47] tty: vt: stop using -1 for blank mode in consw::con_blank() Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 32/47] tty: vt: define a common enum for VESA blanking constants Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 33/47] tty: vt: use " Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 34/47] tty: vt: use enum constants for VESA blanking modes Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 35/47] tty: vt: make types around consw::con_blank() bool Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 36/47] tty: vt: make font of consw::con_font_set() const Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 37/47] tty: vt: make consw::con_font_default()'s name const Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 38/47] tty: vt: change consw::con_set_origin() return type Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 39/47] fbcon: remove consw::con_screen_pos() Jiri Slaby (SUSE)
2024-01-22 11:03 ` [PATCH v2 42/47] fbcon: remove fbcon_getxy() Jiri Slaby (SUSE)
2024-01-22 20:00 ` [PATCH v2 00/47] tty: vt: cleanup and documentation Helge Deller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240122110401.7289-23-jirislaby@kernel.org \
--to=jirislaby@kernel.org \
--cc=James.Bottomley@HansenPartnership.com \
--cc=deller@gmx.de \
--cc=dri-devel@lists.freedesktop.org \
--cc=gregkh@linuxfoundation.org \
--cc=linux-fbdev@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-parisc@vger.kernel.org \
--cc=linux-serial@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).