Re: [RESEND PATCH] tty: serial: 8250: Fix MOXA RS422/RS485 PCIe boards not work by default

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

Hi Crescent,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tty/tty-testing]
[also build test WARNING on tty/tty-next tty/tty-linus usb/usb-testing usb/usb-next usb/usb-linus linus/master v6.7-rc4 next-20231205]
[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/Crescent-CY-Hsieh/tty-serial-8250-Fix-MOXA-RS422-RS485-PCIe-boards-not-work-by-default/20231201-154322
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
patch link:    https://lore.kernel.org/r/20231201074055.259207-1-crescentcy.hsieh%40moxa.com
patch subject: [RESEND PATCH] tty: serial: 8250: Fix MOXA RS422/RS485 PCIe boards not work by default
config: x86_64-randconfig-122-20231202 (https://download.01.org/0day-ci/archive/20231206/202312060523.Kmstf65q-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231206/202312060523.Kmstf65q-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312060523.Kmstf65q-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/tty/serial/8250/8250_pci.c:2001:5: sparse: sparse: symbol 'pci_moxa_supported_rs' was not declared. Should it be static?

vim +/pci_moxa_supported_rs +2001 drivers/tty/serial/8250/8250_pci.c

  2000	
> 2001	u32 pci_moxa_supported_rs(struct pci_dev *dev)
  2002	{
  2003		switch (dev->device & 0x0F00) {
  2004		case 0x0000:
  2005		case 0x0600:
  2006			return MOXA_SUPP_RS232;
  2007		case 0x0100:
  2008			return MOXA_SUPP_RS232 | MOXA_SUPP_RS422 | MOXA_SUPP_RS485;
  2009		case 0x0300:
  2010			return MOXA_SUPP_RS422 | MOXA_SUPP_RS485;
  2011		}
  2012		return 0;
  2013	}
  2014	

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