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Date:   Thu, 21 May 2020 18:34:27 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Dinghao Liu <dinghao.liu@....edu.cn>, kjlu@....edu
Cc:     kbuild-all@...ts.01.org, Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] xhci: Fix runtime PM imbalance on error

Hi Dinghao,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on usb/usb-testing]
[also build test ERROR on v5.7-rc6 next-20200519]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Dinghao-Liu/xhci-Fix-runtime-PM-imbalance-on-error/20200521-152940
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
config: alpha-allyesconfig (attached as .config)
compiler: alpha-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@...el.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):

drivers/usb/host/xhci-histb.c: In function 'xhci_histb_probe':
>> drivers/usb/host/xhci-histb.c:243:18: error: expected ';' before 'hcd'
243 |   goto disable_pm
|                  ^
|                  ;
244 |
245 |  hcd = usb_create_hcd(driver, dev, dev_name(dev));
|  ~~~

vim +243 drivers/usb/host/xhci-histb.c

   195	
   196	static struct hc_driver __read_mostly xhci_histb_hc_driver;
   197	static int xhci_histb_probe(struct platform_device *pdev)
   198	{
   199		struct device *dev = &pdev->dev;
   200		struct xhci_hcd_histb *histb;
   201		const struct hc_driver *driver;
   202		struct usb_hcd *hcd;
   203		struct xhci_hcd *xhci;
   204		struct resource *res;
   205		int irq;
   206		int ret = -ENODEV;
   207	
   208		if (usb_disabled())
   209			return -ENODEV;
   210	
   211		driver = &xhci_histb_hc_driver;
   212		histb = devm_kzalloc(dev, sizeof(*histb), GFP_KERNEL);
   213		if (!histb)
   214			return -ENOMEM;
   215	
   216		histb->dev = dev;
   217	
   218		irq = platform_get_irq(pdev, 0);
   219		if (irq < 0)
   220			return irq;
   221	
   222		histb->ctrl = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
   223		if (IS_ERR(histb->ctrl))
   224			return PTR_ERR(histb->ctrl);
   225	
   226		ret = xhci_histb_clks_get(histb);
   227		if (ret)
   228			return ret;
   229	
   230		histb->soft_reset = devm_reset_control_get(dev, "soft");
   231		if (IS_ERR(histb->soft_reset)) {
   232			dev_err(dev, "failed to get soft reset\n");
   233			return PTR_ERR(histb->soft_reset);
   234		}
   235	
   236		pm_runtime_enable(dev);
   237		pm_runtime_get_sync(dev);
   238		device_enable_async_suspend(dev);
   239	
   240		/* Initialize dma_mask and coherent_dma_mask to 32-bits */
   241		ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
   242		if (ret)
 > 243			goto disable_pm
   244	
   245		hcd = usb_create_hcd(driver, dev, dev_name(dev));
   246		if (!hcd) {
   247			ret = -ENOMEM;
   248			goto disable_pm;
   249		}
   250	
   251		hcd->regs = histb->ctrl;
   252		hcd->rsrc_start = res->start;
   253		hcd->rsrc_len = resource_size(res);
   254	
   255		histb->hcd = hcd;
   256		dev_set_drvdata(hcd->self.controller, histb);
   257	
   258		ret = xhci_histb_host_enable(histb);
   259		if (ret)
   260			goto put_hcd;
   261	
   262		xhci = hcd_to_xhci(hcd);
   263	
   264		device_wakeup_enable(hcd->self.controller);
   265	
   266		xhci->main_hcd = hcd;
   267		xhci->shared_hcd = usb_create_shared_hcd(driver, dev, dev_name(dev),
   268							 hcd);
   269		if (!xhci->shared_hcd) {
   270			ret = -ENOMEM;
   271			goto disable_host;
   272		}
   273	
   274		if (device_property_read_bool(dev, "usb2-lpm-disable"))
   275			xhci->quirks |= XHCI_HW_LPM_DISABLE;
   276	
   277		if (device_property_read_bool(dev, "usb3-lpm-capable"))
   278			xhci->quirks |= XHCI_LPM_SUPPORT;
   279	
   280		/* imod_interval is the interrupt moderation value in nanoseconds. */
   281		xhci->imod_interval = 40000;
   282		device_property_read_u32(dev, "imod-interval-ns",
   283					 &xhci->imod_interval);
   284	
   285		ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
   286		if (ret)
   287			goto put_usb3_hcd;
   288	
   289		if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
   290			xhci->shared_hcd->can_do_streams = 1;
   291	
   292		ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
   293		if (ret)
   294			goto dealloc_usb2_hcd;
   295	
   296		device_enable_async_suspend(dev);
   297		pm_runtime_put_noidle(dev);
   298	
   299		/*
   300		 * Prevent runtime pm from being on as default, users should enable
   301		 * runtime pm using power/control in sysfs.
   302		 */
   303		pm_runtime_forbid(dev);
   304	
   305		return 0;
   306	
   307	dealloc_usb2_hcd:
   308		usb_remove_hcd(hcd);
   309	put_usb3_hcd:
   310		usb_put_hcd(xhci->shared_hcd);
   311	disable_host:
   312		xhci_histb_host_disable(histb);
   313	put_hcd:
   314		usb_put_hcd(hcd);
   315	disable_pm:
   316		pm_runtime_put_sync(dev);
   317		pm_runtime_disable(dev);
   318	
   319		return ret;
   320	}
   321	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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