Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933153AbaFQOm5 (ORCPT ); Tue, 17 Jun 2014 10:42:57 -0400 Received: from bedivere.hansenpartnership.com ([66.63.167.143]:49136 "EHLO bedivere.hansenpartnership.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932870AbaFQOm4 (ORCPT ); Tue, 17 Jun 2014 10:42:56 -0400 Message-ID: <1403016160.27991.1.camel@dabdike.int.hansenpartnership.com> Subject: Re: [PATCH 01/24] kobject: return actual error on kset_create_and_add From: James Bottomley To: Jeff Liu Cc: gregkh@linuxfoundation.org, Christoph Lameter , Andrew Morton , Pekka Enberg , Matt Mackall , benh@kernel.crashing.org, paulus@samba.org, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, herbert@gondor.apana.org.au, davem@davemloft.net, stefanr@s5r6.in-berlin.de, joro@8bytes.org, jejb@parisc-linux.org, deller@gmx.de, bhelgaas@google.com, clm@fb.com, Josef Bacik , swhiteho@redhat.com, bharrosh@panasas.com, bhalevy@primarydata.com, ccaulfie@redhat.com, teigland@redhat.com, "Theodore Ts'o" , adilger.kernel@dilger.ca, jaegeuk@kernel.org, cm224.lee@samsung.com, Mark Fasheh , Joel Becker , casey@schaufler-ca.com, LKML Date: Tue, 17 Jun 2014 07:42:40 -0700 In-Reply-To: <53A04FF7.5050900@oracle.com> References: <53A04FF7.5050900@oracle.com> Content-Type: text/plain; charset="ISO-8859-15" X-Mailer: Evolution 3.12.2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2014-06-17 at 22:25 +0800, Jeff Liu wrote: > From: Jie Liu > > It's better to return the actual error rather than NULL because > kset_register() can failed due to other reasons. > > Cc: Christoph Lameter > Cc: Greg Kroah-Hartman > Cc: Andrew Morton > Cc: Pekka Enberg > Cc: Matt Mackall > Cc: Benjamin Herrenschmidt > Cc: Paul Mackerras > Cc: Martin Schwidefsky > Cc: Heiko Carstens > Cc: Herbert Xu > Cc: David S. Miller > Cc: Stefan Richter > Cc: Joerg Roedel > Cc: James E.J. Bottomley > Cc: Helge Deller > Cc: Bjorn Helgaas > Cc: Chris Mason > Cc: Josef Bacik > Cc: Steven Whitehouse > Cc: Boaz Harrosh > Cc: Benny Halevy > Cc: Christine Caulfield > Cc: David Teigland > Cc: Theodore Ts'o > Cc: Andreas Dilger > Cc: Jaegeuk Kim > Cc: Changman Lee > Cc: Mark Fasheh > Cc: Joel Becker > Cc: Casey Schaufler > Signed-off-by: Jie Liu > --- > lib/kobject.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/lib/kobject.c b/lib/kobject.c > index 58751bb..538c617 100644 > --- a/lib/kobject.c > +++ b/lib/kobject.c > @@ -919,11 +919,11 @@ struct kset *kset_create_and_add(const char *name, > > kset = kset_create(name, uevent_ops, parent_kobj); > if (!kset) > - return NULL; > + return ERR_PTR(-ENOMEM); > error = kset_register(kset); > if (error) { > kfree(kset); > - return NULL; > + return ERR_PTR(error); > } > return kset; > } This patch series isn't bisectable. When changing an error signal from NULL to non-NULL, you have to do it as one patch, otherwise if a bisection lands in here we'll get error returns from all our kobject kset code and the kernel won't boot. It's fine if you're sending it out as 24 patches for review, but it has to be applied as a single one. James -- 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/