linux-kernel - [PATCH 1/4] x86/apic: correct the ENO in generic_processor

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Message-Id: <1564995539-29609-2-git-send-email-kernelfans@gmail.com>
Date:   Mon,  5 Aug 2019 16:58:56 +0800
From:   Pingfan Liu <kernelfans@...il.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>, x86@...nel.org
Cc:     Pingfan Liu <kernelfans@...il.com>, Ingo Molnar <mingo@...hat.com>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Masami Hiramatsu <mhiramat@...nel.org>, Qian Cai <cai@....pw>,
        Vlastimil Babka <vbabka@...e.cz>,
        Daniel Drake <drake@...lessm.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Michal Hocko <mhocko@...e.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        linux-kernel@...r.kernel.org, Dave Young <dyoung@...hat.com>,
        Baoquan He <bhe@...hat.com>, kexec@...ts.infradead.org
Subject: [PATCH 1/4] x86/apic: correct the ENO in generic_processor_info()

When capped by nr_cpu_ids, the current code return -EINVAL or -ENODEV. It
is better to return -EINVAL for both cases.

Signed-off-by: Pingfan Liu <kernelfans@...il.com>
To: Thomas Gleixner <tglx@...utronix.de>
To: Andy Lutomirski <luto@...nel.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Peter Zijlstra <peterz@...radead.org>
To: x86@...nel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Qian Cai <cai@....pw>
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Daniel Drake <drake@...lessm.com>
Cc: Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc: Michal Hocko <mhocko@...e.com>
Cc: Eric Biederman <ebiederm@...ssion.com>
Cc: linux-kernel@...r.kernel.org
Cc: Dave Young <dyoung@...hat.com>
Cc: Baoquan He <bhe@...hat.com>
Cc: kexec@...ts.infradead.org
---
 arch/x86/kernel/apic/apic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index f529136..f4f603a 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2346,7 +2346,7 @@ int generic_processor_info(int apicid, int version)
 			"  Processor %d/0x%x ignored.\n", max, thiscpu, apicid);
 
 		disabled_cpus++;
-		return -ENODEV;
+		return -EINVAL;
 	}
 
 	if (num_processors >= nr_cpu_ids) {
-- 
2.7.5