From 2e8c04f75731bbd968fa77e94ed856f2dcf53ae6 Mon Sep 17 00:00:00 2001
From: Robert Abel <rabel@robertabel.eu>
Date: Sat, 10 Feb 2018 00:50:10 +0100
Subject: [PATCH] auxdisplay: charlcd: fix hex literal ranges for graphics
command
The graphics command expects 16 hexadecimal literals, but would allow
characters in range [0-9a-zA-Z] instead of [0-9a-fA-F].
Signed-off-by: Robert Abel <rabel@robertabel.eu>
Acked-by: Willy Tarreau <w@1wt.eu>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
---
drivers/auxdisplay/charlcd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/auxdisplay/charlcd.c b/drivers/auxdisplay/charlcd.c
index 0246ff77e7729..674ffbae1c656 100644
--- a/drivers/auxdisplay/charlcd.c
+++ b/drivers/auxdisplay/charlcd.c
@@ -443,9 +443,9 @@ static inline int handle_lcd_special_code(struct charlcd *lcd)
shift ^= 4;
if (*esc >= '0' && *esc <= '9') {
value |= (*esc - '0') << shift;
- } else if (*esc >= 'A' && *esc <= 'Z') {
+ } else if (*esc >= 'A' && *esc <= 'F') {
value |= (*esc - 'A' + 10) << shift;
- } else if (*esc >= 'a' && *esc <= 'z') {
+ } else if (*esc >= 'a' && *esc <= 'f') {
value |= (*esc - 'a' + 10) << shift;
} else {
esc++;
--
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