linux-kernel - Re: [PACTH v4 1/2] usb: xhci: plat: Enable runtime PM

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Date:	Wed, 10 Aug 2016 00:22:23 +0800
From:	kbuild test robot <lkp@...el.com>
To:	robert.foss@...labora.com
Cc:	kbuild-all@...org, mathias.nyman@...el.com,
	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, Julius Werner <jwerner@...omium.org>,
	Andrew Bresticker <abrestic@...omium.org>,
	Felipe Balbi <felipe.balbi@...ux.intel.com>,
	Robert Foss <robert.foss@...labora.com>
Subject: Re: [PACTH v4 1/2] usb: xhci: plat: Enable runtime PM

Hi Robert,

[auto build test WARNING on usb/usb-testing]
[also build test WARNING on v4.8-rc1 next-20160809]
[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/robert-foss-collabora-com/usb-xhci-plat-Enable-PM-async-resume-suspend/20160809-234302
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
config: i386-randconfig-s0-201632 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   drivers/usb/host/xhci-plat.c: In function 'xhci_plat_suspend':
>> drivers/usb/host/xhci-plat.c:303:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if (ret < 0)
     ^~
   drivers/usb/host/xhci-plat.c:305:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
      return ret;
      ^~~~~~
   drivers/usb/host/xhci-plat.c: In function 'xhci_plat_resume':
   drivers/usb/host/xhci-plat.c:327:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if (ret < 0)
     ^~
   drivers/usb/host/xhci-plat.c:329:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
      return ret;
      ^~~~~~

vim +/if +303 drivers/usb/host/xhci-plat.c

   287	
   288		if (!IS_ERR(clk))
   289			clk_disable_unprepare(clk);
   290		usb_put_hcd(hcd);
   291	
   292		return 0;
   293	}
   294	
   295	#ifdef CONFIG_PM_SLEEP
   296	static int xhci_plat_suspend(struct device *dev)
   297	{
   298		struct usb_hcd	*hcd = dev_get_drvdata(dev);
   299		struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
   300		int ret;
   301	
   302		ret = pm_runtime_get_sync(dev);
 > 303		if (ret < 0)
   304			atomic_dec(&dev->power.usage_count);
   305			return ret;
   306		/*
   307		 * xhci_suspend() needs `do_wakeup` to know whether host is allowed
   308		 * to do wakeup during suspend. Since xhci_plat_suspend is currently
   309		 * only designed for system suspend, device_may_wakeup() is enough
   310		 * to dertermine whether host is allowed to do wakeup. Need to
   311		 * reconsider this when xhci_plat_suspend enlarges its scope, e.g.,

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

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