linux-kernel - Re: [PATCH] x86: fix IO APIC resource allocation error message

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Message-Id: <200903202102.28585.bzolnier@gmail.com>
Date:	Fri, 20 Mar 2009 21:02:28 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	Cyrill Gorcunov <gorcunov@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Alan Bartlett <ajb.stxsl@...glemail.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: fix IO APIC resource allocation error message

On Friday 20 March 2009, Cyrill Gorcunov wrote:
> [Bartlomiej Zolnierkiewicz - Fri, Mar 20, 2009 at 08:12:41PM +0100]
> | From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> | Subject: [PATCH] x86: fix IO APIC resource allocation error message
> | 
> | Impact: fix incorrect error message
> | 
> | - IO APIC resource allocation error message contains one too many "be".
> | 
> | - Print the error message iff there are IO APICs in the system.
> | 
> | Cc: Alan Bartlett <ajb.stxsl@...glemail.com>
> | Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> | ---
> | I've seen this error message for some time on my x86-32 laptop...
> | 
> |  arch/x86/kernel/io_apic.c |    4 ++--
> |  1 file changed, 2 insertions(+), 2 deletions(-)
> | 
> | Index: b/arch/x86/kernel/io_apic.c
> | ===================================================================
> | --- a/arch/x86/kernel/io_apic.c
> | +++ b/arch/x86/kernel/io_apic.c
> | @@ -4150,9 +4150,9 @@ static int __init ioapic_insert_resource
> |  	int i;
> |  	struct resource *r = ioapic_resources;
> |  
> | -	if (!r) {
> | +	if (!r && nr_ioapics > 0) {
> |  		printk(KERN_ERR
> | -		       "IO APIC resources could be not be allocated.\n");
> | +		       "IO APIC resources couldn't be allocated.\n");
> |  		return -1;
> |  	}
> |  
> | 
> 
> Hi Bartlomiej,
> 
> until I miss something I guess you could even make it simplier :)
> Something like
> 
> ---
> static int __init ioapic_insert_resources(void)
> {
> 	struct resource *r = ioapic_resources;
> 	int err;
> 	int i;
> 
> 	for (i = 0; i < nr_ioapics; i++) {
> 		err = insert_resource(&iomem_resource, r);
> 		if (err) {
> 			pr_err("IO APIC resources could not be allocated.\n");
> 			return err;
> 		}
> 		r++;
> 	}
> 
> 	return 0;
> }
> ---
> 
> Now we would have 'err' here and get out only on conflicting resource.
> Did I miss something?

nr_ioapics > 0 && r == NULL ?
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