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[24.155.109.49]) by smtp.gmail.com with ESMTPSA id u123-v6sm7422757oie.22.2018.10.18.10.09.31 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 18 Oct 2018 10:09:31 -0700 (PDT) Date: Thu, 18 Oct 2018 12:09:31 -0500 From: Rob Herring To: frowand.list@gmail.com Subject: Re: [PATCH v4 04/18] powerpc/pseries: add of_node_put() in dlpar_detach_node() Message-ID: <20181018170931.GC15557@bogus> References: <1539657458-24401-1-git-send-email-frowand.list@gmail.com> <1539657458-24401-5-git-send-email-frowand.list@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1539657458-24401-5-git-send-email-frowand.list@gmail.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Alan Tull , linux-fpga@vger.kernel.org, Pantelis Antoniou , linux-kernel@vger.kernel.org, Moritz Fischer , Paul Mackerras , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Mon, Oct 15, 2018 at 07:37:24PM -0700, frowand.list@gmail.com wrote: > From: Frank Rowand > > "of: overlay: add missing of_node_get() in __of_attach_node_sysfs" > added a missing of_node_get() to __of_attach_node_sysfs(). This > results in a refcount imbalance for nodes attached with > dlpar_attach_node(). The calling sequence from dlpar_attach_node() > to __of_attach_node_sysfs() is: > > dlpar_attach_node() > of_attach_node() > __of_attach_node_sysfs() IIRC, there's a long standing item in the todo (Grant's) to convert the open coded dlpar code. Maybe you want to do that first? > > Signed-off-by: Frank Rowand > --- > > ***** UNTESTED. I need people with the affected PowerPC systems > ***** (systems that dynamically allocate and deallocate > ***** devicetree nodes) to test this patch. Can't we write a test case that does the same thing? > > arch/powerpc/platforms/pseries/dlpar.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c > index a0b20c03f078..e3010b14aea5 100644 > --- a/arch/powerpc/platforms/pseries/dlpar.c > +++ b/arch/powerpc/platforms/pseries/dlpar.c > @@ -272,6 +272,8 @@ int dlpar_detach_node(struct device_node *dn) > if (rc) > return rc; > > + of_node_put(dn); > + > return 0; > } > > -- > Frank Rowand >