Re: [PATCH 1/3] usb: gadget: add Aspeed ast2600 udc driver

kernel test robot
2022-05-13T11:05:14Z

Hi Neal,

I love your patch! Perhaps something to improve:

[auto build test WARNING on usb/usb-testing]
[also build test WARNING on robh/for-next v5.18-rc6 next-20220513]
[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]

url: https://github.com/intel-lab-lkp/linux/commits/Neal-Liu/add-Aspeed-udc-driver-for-ast2600/20220513-150314
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20220513/202205131836.QEUySDoN-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 11.3.0
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
# https://github.com/intel-lab-lkp/linux/commit/272ae26f9fe89f60d584cf445431d0fa566eb24b
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Neal-Liu/add-Aspeed-udc-driver-for-ast2600/20220513-150314
git checkout 272ae26f9fe89f60d584cf445431d0fa566eb24b
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash drivers/usb/gadget/udc/

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

All warnings (new ones prefixed by >>):

drivers/usb/gadget/udc/aspeed_udc.c: In function 'ast_udc_ep0_out':
>> drivers/usb/gadget/udc/aspeed_udc.c:790:13: warning: variable 'buf' set but not used [-Wunused-but-set-variable]
790 | u8 *buf;
| ^~~
drivers/usb/gadget/udc/aspeed_udc.c: In function 'ast_udc_ep0_handle_setup':
>> drivers/usb/gadget/udc/aspeed_udc.c:1099:60: warning: suggest braces around empty body in an 'else' statement [-Wempty-body]
1099 | SETUP_DBG(udc, "No gadget for request !\n");
| ^
>> drivers/usb/gadget/udc/aspeed_udc.c:1034:13: warning: variable 'ep_num' set but not used [-Wunused-but-set-variable]
1034 | u16 ep_num = 0;
| ^~~~~~

vim +/buf +790 drivers/usb/gadget/udc/aspeed_udc.c

783
784 static void ast_udc_ep0_out(struct ast_udc_dev *udc)
785 {
786 struct device *dev = &udc->pdev->dev;
787 struct ast_udc_ep *ep = &udc->ep[0];
788 struct ast_udc_request *req;
789 u16 rx_len;
> 790 u8 *buf;
791
792 if (list_empty(&ep->queue))
793 return;
794
795 req = list_entry(ep->queue.next, struct ast_udc_request, queue);
796
797 buf = req->req.buf;
798 rx_len = EP0_GET_RX_LEN(ast_udc_read(udc, AST_UDC_EP0_CTRL));
799 req->req.actual += rx_len;
800
801 SETUP_DBG(udc, "req %p (%d/%d)\n", req,
802 req->req.actual, req->req.length);
803
804 if ((rx_len < ep->ep.maxpacket) ||
805 (req->req.actual == req->req.length)) {
806 ast_udc_ep0_tx(udc);
807 if (!ep->dir_in)
808 ast_udc_done(ep, req, 0);
809
810 } else {
811 if (rx_len > req->req.length) {
812 // Issue Fix
813 dev_warn(dev, "Something wrong (%d/%d)\n",
814 req->req.actual, req->req.length);
815 ast_udc_ep0_tx(udc);
816 ast_udc_done(ep, req, 0);
817 return;
818 }
819
820 ep->dir_in = 0;
821
822 /* More works */
823 ast_udc_ep0_queue(ep, req);
824 }
825 }
826

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0-DAY CI Kernel Test Service