[PATCH 2/3] usb: xhci-mtk: fix a short packet issue of gen1 isoc-in transfer

[kernel test robot]

Hi Chunfeng,

kernel test robot noticed the following build errors:

[auto build test ERROR on usb/usb-testing]
[also build test ERROR on usb/usb-next usb/usb-linus robh/for-next krzk/for-next linus/master v6.7-rc5 next-20231214]
[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/Chunfeng-Yun/usb-xhci-mtk-fix-a-short-packet-issue-of-gen1-isoc-in-transfer/20231213-143959
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
patch link:    https://lore.kernel.org/r/20231213063543.12435-2-chunfeng.yun%40mediatek.com
patch subject: [PATCH 2/3] usb: xhci-mtk: fix a short packet issue of gen1 isoc-in transfer
config: openrisc-allyesconfig (https://download.01.org/0day-ci/archive/20231215/202312150146.ffBFCrhf-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231215/202312150146.ffBFCrhf-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312150146.ffBFCrhf-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/usb/host/xhci-mtk.c: In function 'xhci_mtk_rxfifo_depth_set':
>> drivers/usb/host/xhci-mtk.c:184:26: error: implicit declaration of function 'FIELD_PREP' [-Werror=implicit-function-declaration]
     184 |                 value |= FIELD_PREP(SCH3_RXFIFO_DEPTH_MASK, 2);
         |                          ^~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/FIELD_PREP +184 drivers/usb/host/xhci-mtk.c

   170	
   171	/*
   172	 * workaround: usb3.2 gen1 isoc rx hw issue
   173	 * host send out unexpected ACK afer device fininsh a burst transfer with
   174	 * a short packet.
   175	 */
   176	static void xhci_mtk_rxfifo_depth_set(struct xhci_hcd_mtk *mtk)
   177	{
   178		struct usb_hcd *hcd = mtk->hcd;
   179		u32 value;
   180	
   181		if (mtk->rxfifo_depth_quirk) {
   182			value = readl(hcd->regs + HSCH_CFG1);
   183			value &= ~SCH3_RXFIFO_DEPTH_MASK;
 > 184			value |= FIELD_PREP(SCH3_RXFIFO_DEPTH_MASK, 2);
   185			writel(value, hcd->regs + HSCH_CFG1);
   186		}
   187	}
   188	

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