linux-kernel - [PATCH 16/38] vc: move translation out of do_con

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Message-Id: <20200615074910.19267-16-jslaby@suse.cz>
Date:   Mon, 15 Jun 2020 09:48:48 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     gregkh@...uxfoundation.org
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 16/38] vc: move translation out of do_con_write

Now that we reordered the code and the label, we can eliminate the
translation into a separate function. We call it vc_translate here.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/tty/vt/vt.c | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 93ad7e004900..0f61dc360067 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -2658,6 +2658,19 @@ static int vc_translate_unicode(struct vc_data *vc, int c, bool *rescan)
 	return -1;
 }
 
+static int vc_translate(struct vc_data *vc, int *c, bool *rescan)
+{
+	/* Do no translation at all in control states */
+	if (vc->vc_state != ESnormal)
+		return *c;
+
+	if (vc->vc_utf && !vc->vc_disp_ctrl)
+		return *c = vc_translate_unicode(vc, *c, rescan);
+
+	/* no utf or alternate charset mode */
+	return vc_translate_ascii(vc, *c);
+}
+
 static inline unsigned char vc_invert_attr(const struct vc_data *vc)
 {
 	if (!vc->vc_can_do_color)
@@ -2726,16 +2739,9 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
 		inverse = false;
 		width = 1;
 
-		/* Do no translation at all in control states */
-		if (vc->vc_state != ESnormal) {
-			tc = c;
-		} else if (vc->vc_utf && !vc->vc_disp_ctrl) {
-			tc = c = vc_translate_unicode(vc, c, &rescan);
-			if (tc == -1)
-				continue;
-		} else {	/* no utf or alternate charset mode */
-			tc = vc_translate_ascii(vc, c);
-		}
+		tc = vc_translate(vc, &c, &rescan);
+		if (tc == -1)
+			continue;
 
 		param.c = tc;
 		if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
-- 
2.27.0