linux-kernel - Re: [PATCH 2/4] PCI: add functionality for resizing resources v2

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Message-ID: <201703141622.rArcu8cT%fengguang.wu@intel.com>
Date:   Tue, 14 Mar 2017 17:01:58 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Christian König <deathsimple@...afone.de>
Cc:     kbuild-all@...org, helgaas@...nel.org, linux-pci@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        platform-driver-x86@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] PCI: add functionality for resizing resources v2

Hi Christian,

[auto build test WARNING on pci/next]
[also build test WARNING on v4.11-rc2 next-20170310]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Christian-K-nig/PCI-add-resizeable-BAR-infrastructure-v3/20170314-163334
base:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next
config: i386-randconfig-x077-201711 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   drivers/pci/setup-res.c: In function 'pci_resize_resource':
>> drivers/pci/setup-res.c:422:2: warning: ignoring return value of 'pci_reenable_device', declared with attribute warn_unused_result [-Wunused-result]
     pci_reenable_device(dev->bus->self);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/pci/setup-res.c:432:2: warning: ignoring return value of 'pci_reenable_device', declared with attribute warn_unused_result [-Wunused-result]
     pci_reenable_device(dev->bus->self);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/pci_reenable_device +422 drivers/pci/setup-res.c

   406			res->end = resource_size(res) - 1;
   407			res->start = 0;
   408			if (resno < PCI_BRIDGE_RESOURCES)
   409				pci_update_resource(dev, resno);
   410		}
   411	
   412		ret = pci_rbar_set_size(dev, resno, size);
   413		if (ret)
   414			goto error_reassign;
   415	
   416		res->end = res->start + bytes - 1;
   417	
   418		ret = pci_reassign_bridge_resources(dev->bus->self, res->flags);
   419		if (ret)
   420			goto error_resize;
   421	
 > 422		pci_reenable_device(dev->bus->self);
   423		return 0;
   424	
   425	error_resize:
   426		pci_rbar_set_size(dev, resno, old);
   427		res->end = res->start + (1ULL << (old + 20)) - 1;
   428	
   429	error_reassign:
   430		pci_assign_unassigned_bus_resources(dev->bus);

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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