From 72a848f5c46bab4c921edc9cbffd1ab273b2be17 Mon Sep 17 00:00:00 2001
From: Dingchen Zhang <dingchen.zhang@amd.com>
Date: Mon, 10 Jun 2019 09:47:51 -0400
Subject: [PATCH] drm: remove the newline for CRC source name.
Git-commit: 72a848f5c46bab4c921edc9cbffd1ab273b2be17
Patch-mainline: v5.6-rc1
References: bsc#1051510

userspace may transfer a newline, and this terminating newline
is replaced by a '\0' to avoid followup issues.

'len-1' is the index to replace the newline of CRC source name.

V3: typo fix (Sam)

V2: update patch subject, body and format. (Sam)

Cc: Leo Li <sunpeng.li@amd.com>
Cc: Harry Wentland <Harry.Wentland@amd.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Dingchen Zhang <dingchen.zhang@amd.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190610134751.14356-1-dingchen.zhang@amd.com
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/drm_debugfs_crc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/drm_debugfs_crc.c
+++ b/drivers/gpu/drm/drm_debugfs_crc.c
@@ -101,8 +101,8 @@ static ssize_t crc_control_write(struct
 	if (IS_ERR(source))
 		return PTR_ERR(source);
 
-	if (source[len] == '\n')
-		source[len] = '\0';
+	if (source[len - 1] == '\n')
+		source[len - 1] = '\0';
 
 	spin_lock_irq(&crc->lock);