linux-kernel - Re: [PATCH 1/2] staging: android: logger: Allocate logs dynamically at boot (v2)

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Message-ID: <4FAC3336.3010609@am.sony.com>
Date:	Thu, 10 May 2012 14:29:26 -0700
From:	Tim Bird <tim.bird@...sony.com>
To:	Greg KH <gregkh@...uxfoundation.org>
CC:	Brian Swetland <swetland@...gle.com>,
	linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] staging: android: logger: Allocate logs dynamically
 at boot (v2)

On 05/10/2012 02:21 PM, Greg KH wrote:
> On Thu, May 10, 2012 at 02:16:31PM -0700, Tim Bird wrote:
>> +	log->misc.minor = MISC_DYNAMIC_MINOR;
>> +	log->misc.name = kstrdup(log_name, GFP_KERNEL);
>> +	if (log->misc.name == NULL) {
>> +		ret = -1;
>> +		goto out_free_log;
> 
> Please return a "real" error number, not just -1.  You do this a few
> times in this function, -EINVAL perhaps?  -1 is -EPERM, which is not
> what you want to be saying here, right?

You're right.  This is only called by init code now, which doesn't
look at the return value (only checks for non-zero), but the intent
is to change this going forward, so a real error number is called for.

These are all memory allocation failures, so I'm thinking of using
-ENOMEM.  Would that be right?
 -- Tim

=============================
Tim Bird
Architecture Group Chair, CE Workgroup of the Linux Foundation
Senior Staff Engineer, Sony Network Entertainment
=============================

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