linux-kernel - [PATCH 7/8] kexec/crash: Say which char is the unrecognized

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Date:	Mon, 19 Oct 2015 11:17:47 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 7/8] kexec/crash: Say which char is the unrecognized

From: Borislav Petkov <bp@...e.de>

It is helpful when the crashkernel cmdline parsing routines actually say
which character is the unrecognized one. Make them do so.

Reviewed-by: Dave Young <dyoung@...hat.com>
Reviewed-by: Joerg Roedel <jroedel@...e.de>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Baoquan He <bhe@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: jerry_hoemann@...com
Cc: Jiri Kosina <jkosina@...e.cz>
Cc: Juergen Gross <jgross@...e.com>
Cc: Mark Salter <msalter@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Vivek Goyal <vgoyal@...hat.com>
Cc: WANG Chao <chaowang@...hat.com>
Cc: x86-ml <x86@...nel.org>
Signed-off-by: Borislav Petkov <bp@...e.de>
---
 kernel/kexec_core.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index 201b45327804..bd9f8a03cefa 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -1149,7 +1149,7 @@ static int __init parse_crashkernel_simple(char *cmdline,
 	if (*cur == '@')
 		*crash_base = memparse(cur+1, &cur);
 	else if (*cur != ' ' && *cur != '\0') {
-		pr_warn("crashkernel: unrecognized char\n");
+		pr_warn("crashkernel: unrecognized char: %c\n", *cur);
 		return -EINVAL;
 	}
 
@@ -1186,12 +1186,12 @@ static int __init parse_crashkernel_suffix(char *cmdline,
 
 	/* check with suffix */
 	if (strncmp(cur, suffix, strlen(suffix))) {
-		pr_warn("crashkernel: unrecognized char\n");
+		pr_warn("crashkernel: unrecognized char: %c\n", *cur);
 		return -EINVAL;
 	}
 	cur += strlen(suffix);
 	if (*cur != ' ' && *cur != '\0') {
-		pr_warn("crashkernel: unrecognized char\n");
+		pr_warn("crashkernel: unrecognized char: %c\n", *cur);
 		return -EINVAL;
 	}
 
-- 
2.3.5

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