Re: [PATCH v2 6/9] usb: dwc3: qcom: fix peripheral and OTG suspend

[kernel test robot <lkp@intel.com>]

Hi Johan,

I love your patch! Perhaps something to improve:

[auto build test WARNING on usb/usb-testing]
[also build test WARNING on linus/master next-20220804]
[cannot apply to robh/for-next v5.19]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Johan-Hovold/usb-dwc3-qcom-fix-wakeup-implementation/20220804-231122
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
config: arc-randconfig-r002-20220804 (https://download.01.org/0day-ci/archive/20220805/202208050544.ijUhoUyB-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 12.1.0
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
        # https://github.com/intel-lab-lkp/linux/commit/f3778ca026b16474e49c5e0188a0eb91d73eef2f
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Johan-Hovold/usb-dwc3-qcom-fix-wakeup-implementation/20220804-231122
        git checkout f3778ca026b16474e49c5e0188a0eb91d73eef2f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash drivers/usb/dwc3/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/usb/dwc3/dwc3-qcom.c: In function 'dwc3_qcom_read_usb2_speed':
>> drivers/usb/dwc3/dwc3-qcom.c:313:25: warning: variable 'hcd' set but not used [-Wunused-but-set-variable]
     313 |         struct usb_hcd *hcd;
         |                         ^~~


vim +/hcd +313 drivers/usb/dwc3/dwc3-qcom.c

   308	
   309	static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom)
   310	{
   311		struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
   312		struct usb_device *udev;
 > 313		struct usb_hcd *hcd;
   314	
   315		/*
   316		 * FIXME: Fix this layering violation.
   317		 */
   318		hcd = platform_get_drvdata(dwc->xhci);
   319	
   320		/*
   321		 * It is possible to query the speed of all children of
   322		 * USB2.0 root hub via usb_hub_for_each_child(). DWC3 code
   323		 * currently supports only 1 port per controller. So
   324		 * this is sufficient.
   325		 */
   326	#ifdef CONFIG_USB
   327		udev = usb_hub_find_child(hcd->self.root_hub, 1);
   328	#else
   329		udev = NULL;
   330	#endif
   331		if (!udev)
   332			return USB_SPEED_UNKNOWN;
   333	
   334		return udev->speed;
   335	}
   336	

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