Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750982Ab2FRLwJ (ORCPT ); Mon, 18 Jun 2012 07:52:09 -0400 Received: from mail-qa0-f42.google.com ([209.85.216.42]:38155 "EHLO mail-qa0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750696Ab2FRLwH (ORCPT ); Mon, 18 Jun 2012 07:52:07 -0400 MIME-Version: 1.0 In-Reply-To: References: Date: Mon, 18 Jun 2012 13:52:06 +0200 Message-ID: Subject: Re: Q: return of pinctrl_register and handing at drivers that use this function From: Linus Walleij To: "devendra.aaru" Cc: Stephen Warren , linux-kernel@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 795 Lines: 21 On Mon, Jun 18, 2012 at 1:47 PM, devendra.aaru wrote: > since the pinctrl_register returns a pointer of structure type "struct > pinctrl_dev" or NULL if it was failed to register the pinctrl driver, > so IS_ERR checking is not required? Yes. (Unless I did something wrong.) > My understanding about IS_ERR is that its used when the pointer > addresses are kind of error codes rather actual addresses, > but are a kind of return codes of functions returning integer types. You are absolutely right. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/