linux-kernel - [PATCH 2/2] video: fbdev: amifb: add FIXMEs about {put,get}

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Date:   Tue, 2 Jun 2020 12:38:18 +0200
From:   Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:     linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org
Cc:     linux-kernel@...r.kernel.org,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH 2/2] video: fbdev: amifb: add FIXMEs about {put,get}_user()
 failures

Since we lack the hardware (or proper emulator setup) for
testing needed changes add FIXMEs to document the issues
(so at least they are not forgotten).

Cc: Al Viro <viro@...iv.linux.org.uk>
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
---
 drivers/video/fbdev/amifb.c |    2 ++
 1 file changed, 2 insertions(+)

Index: b/drivers/video/fbdev/amifb.c
===================================================================
--- a/drivers/video/fbdev/amifb.c
+++ b/drivers/video/fbdev/amifb.c
@@ -1866,6 +1866,7 @@ static int ami_get_var_cursorinfo(struct
 				"clrb %0 ; swap %1 ; lslw #1,%1 ; roxlb #1,%0 ; "
 				"swap %1 ; lslw #1,%1 ; roxlb #1,%0"
 				: "=d" (color), "=d" (datawords) : "1" (datawords));
+			/* FIXME: check the return value + test the change */
 			put_user(color, data++);
 		}
 		if (bits > 0) {
@@ -1923,6 +1924,7 @@ static int ami_set_var_cursorinfo(struct
 		bits = 16; words = delta; datawords = 0;
 		for (width = (short)var->width - 1; width >= 0; width--) {
 			unsigned long tdata = 0;
+			/* FIXME: check the return value + test the change */
 			get_user(tdata, data);
 			data++;
 			asm volatile (