linux-kernel - Re: [PATCH v3] usb: dwc2: dwc2_vbus_supply

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Date:   Sat, 24 Mar 2018 08:24:57 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Tomeu Vizoso <tomeu.vizoso@...labora.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Amelie Delaunay <amelie.delaunay@...com>,
        Minas Harutyunyan <hminas@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH v3] usb: dwc2: dwc2_vbus_supply_init: fix error check

Hi Tomeu,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on balbi-usb/next]
[also build test WARNING on next-20180323]
[cannot apply to v4.16-rc6]
[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/Tomeu-Vizoso/usb-dwc2-dwc2_vbus_supply_init-fix-error-check/20180324-063752
base:   https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git next


coccinelle warnings: (new ones prefixed by >>)

>> drivers/usb/dwc2/hcd.c:367:9-16: ERROR: PTR_ERR applied after initialization to constant on line 366

vim +367 drivers/usb/dwc2/hcd.c

   358	
   359	static int dwc2_vbus_supply_init(struct dwc2_hsotg *hsotg)
   360	{
   361		hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus");
   362		if (PTR_ERR(hsotg->vbus_supply) == -ENODEV) {
   363			hsotg->vbus_supply = NULL;
   364			return 0;
   365		} else if (IS_ERR(hsotg->vbus_supply)) {
 > 366			hsotg->vbus_supply = NULL;
 > 367			return PTR_ERR(hsotg->vbus_supply);
   368		}
   369	
   370		return regulator_enable(hsotg->vbus_supply);
   371	}
   372	

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