From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bjorn Helgaas Subject: Re: [PATCH 1/1] PCI: Deletion of unnecessary checks before three function calls Date: Mon, 10 Nov 2014 21:07:17 -0700 Message-ID: <20141111040717.GD28161__26665.2299011641$1415678964$gmane$org@google.com> References: <530C5E18.1020800@users.sourceforge.net> <530CD2C4.4050903@users.sourceforge.net> <530CF8FF.8080600@users.sourceforge.net> <530DD06F.4090703@users.sourceforge.net> <5317A59D.4@users.sourceforge.net> <545649DE.80304@users.sourceforge.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1Xo2jk-00007O-Su for xen-devel@lists.xenproject.org; Tue, 11 Nov 2014 04:07:25 +0000 Received: by mail-ie0-f173.google.com with SMTP id tr6so10673575ieb.18 for ; Mon, 10 Nov 2014 20:07:22 -0800 (PST) Content-Disposition: inline In-Reply-To: <545649DE.80304@users.sourceforge.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: SF Markus Elfring Cc: kernel-janitors@vger.kernel.org, trivial@kernel.org, linux-pci@vger.kernel.org, "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, David Vrabel , xen-devel@lists.xenproject.org, Boris Ostrovsky , Coccinelle , Len Brown List-Id: xen-devel@lists.xenproject.org On Sun, Nov 02, 2014 at 04:12:30PM +0100, SF Markus Elfring wrote: > The functions pci_dev_put(), pci_pme_wakeup_bus() and put_device() test > whether their argument is NULL and then return immediately. Thus the test > around the call is not needed. > > This issue was detected by using the Coccinelle software. > > Signed-off-by: Markus Elfring Applied to pci/misc for v3.19, thanks! > --- > drivers/pci/pci-acpi.c | 3 +-- > drivers/pci/probe.c | 3 +-- > drivers/pci/search.c | 3 +-- > drivers/pci/xen-pcifront.c | 3 +-- > 4 files changed, 4 insertions(+), 8 deletions(-) > > diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c > index 37263b0..a8fe5de 100644 > --- a/drivers/pci/pci-acpi.c > +++ b/drivers/pci/pci-acpi.c > @@ -60,8 +60,7 @@ static void pci_acpi_wake_dev(struct work_struct *work) > pci_wakeup_event(pci_dev); > pm_runtime_resume(&pci_dev->dev); > > - if (pci_dev->subordinate) > - pci_pme_wakeup_bus(pci_dev->subordinate); > + pci_pme_wakeup_bus(pci_dev->subordinate); > } > > /** > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c > index 4170113..e93f16e 100644 > --- a/drivers/pci/probe.c > +++ b/drivers/pci/probe.c > @@ -86,8 +86,7 @@ static void release_pcibus_dev(struct device *dev) > { > struct pci_bus *pci_bus = to_pci_bus(dev); > > - if (pci_bus->bridge) > - put_device(pci_bus->bridge); > + put_device(pci_bus->bridge); > pci_bus_remove_resources(pci_bus); > pci_release_bus_of_node(pci_bus); > kfree(pci_bus); > diff --git a/drivers/pci/search.c b/drivers/pci/search.c > index 827ad83..2d806bd 100644 > --- a/drivers/pci/search.c > +++ b/drivers/pci/search.c > @@ -305,8 +305,7 @@ static struct pci_dev *pci_get_dev_by_id(const struct > pci_device_id *id, > match_pci_dev_by_id); > if (dev) > pdev = to_pci_dev(dev); > - if (from) > - pci_dev_put(from); > + pci_dev_put(from); > return pdev; > } > > diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c > index 53df39a..46664cc 100644 > --- a/drivers/pci/xen-pcifront.c > +++ b/drivers/pci/xen-pcifront.c > @@ -596,8 +596,7 @@ static pci_ers_result_t pcifront_common_process(int cmd, > pcidev = pci_get_bus_and_slot(bus, devfn); > if (!pcidev || !pcidev->driver) { > dev_err(&pdev->xdev->dev, "device or AER driver is NULL\n"); > - if (pcidev) > - pci_dev_put(pcidev); > + pci_dev_put(pcidev); > return result; > } > pdrv = pcidev->driver; > -- > 2.1.3 > >