Hi Hector,

I love your patch! Yet something to improve:

[auto build test ERROR on arm64/for-next/core]
[also build test ERROR on robh/for-next linus/master v5.11-rc6 next-20210125]
[cannot apply to tip/irq/core]
[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/0day-ci/linux/commits/Hector-Martin/Apple-M1-SoC-platform-bring-up/20210205-045228
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
config: arm-defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
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/0day-ci/linux/commit/c3bf64138f141e20577083d30e0542004c194a20
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Hector-Martin/Apple-M1-SoC-platform-bring-up/20210205-045228
        git checkout c3bf64138f141e20577083d30e0542004c194a20
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

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

All errors (new ones prefixed by >>):

   drivers/tty/serial/samsung_tty.c:60: warning: "NO_IRQ" redefined
      60 | #define NO_IRQ -1
         | 
   In file included from arch/arm/include/asm/hardirq.h:5,
                    from include/linux/hardirq.h:10,
                    from include/linux/interrupt.h:11,
                    from include/linux/serial_core.h:13,
                    from drivers/tty/serial/samsung_tty.c:36:
   arch/arm/include/asm/irq.h:22: note: this is the location of the previous definition
      22 | #define NO_IRQ ((unsigned int)(-1))
         | 
   drivers/tty/serial/samsung_tty.c: In function 's3c24xx_serial_resume_noirq':
>> drivers/tty/serial/samsung_tty.c:2309:4: error: a label can only be part of a statement and a declaration is not a statement
    2309 |    unsigned int ucon;
         |    ^~~~~~~~
   drivers/tty/serial/samsung_tty.c:2334:4: error: a label can only be part of a statement and a declaration is not a statement
    2334 |    unsigned int uintm = 0xf;
         |    ^~~~~~~~


vim +2309 drivers/tty/serial/samsung_tty.c

  2299	
  2300	static int s3c24xx_serial_resume_noirq(struct device *dev)
  2301	{
  2302		struct uart_port *port = s3c24xx_dev_to_port(dev);
  2303		struct s3c24xx_uart_port *ourport = to_ourport(port);
  2304	
  2305		if (port) {
  2306			/* restore IRQ mask */
  2307			switch (s3c24xx_irq_type(port)) {
  2308			case IRQ_APPLE:
> 2309				unsigned int ucon;
  2310	
  2311				clk_prepare_enable(ourport->clk);
  2312				if (!IS_ERR(ourport->baudclk))
  2313					clk_prepare_enable(ourport->baudclk);
  2314	
  2315				ucon = rd_regl(port, S3C2410_UCON);
  2316	
  2317				ucon &= ~(APPLE_UCON_TXTHRESH_ENA_MSK |
  2318					APPLE_UCON_RXTHRESH_ENA_MSK |
  2319					APPLE_UCON_RXTO_ENA_MSK);
  2320	
  2321				if (ourport->tx_enabled)
  2322					ucon |= APPLE_UCON_TXTHRESH_ENA_MSK;
  2323				if (ourport->rx_enabled)
  2324					ucon |= APPLE_UCON_RXTHRESH_ENA_MSK |
  2325						APPLE_UCON_RXTO_ENA_MSK;
  2326	
  2327				wr_regl(port, S3C2410_UCON, ucon);
  2328	
  2329				if (!IS_ERR(ourport->baudclk))
  2330					clk_disable_unprepare(ourport->baudclk);
  2331				clk_disable_unprepare(ourport->clk);
  2332				break;
  2333			case IRQ_S3C6400:
  2334				unsigned int uintm = 0xf;
  2335	
  2336				if (ourport->tx_enabled)
  2337					uintm &= ~S3C64XX_UINTM_TXD_MSK;
  2338				if (ourport->rx_enabled)
  2339					uintm &= ~S3C64XX_UINTM_RXD_MSK;
  2340				clk_prepare_enable(ourport->clk);
  2341				if (!IS_ERR(ourport->baudclk))
  2342					clk_prepare_enable(ourport->baudclk);
  2343				wr_regl(port, S3C64XX_UINTM, uintm);
  2344				if (!IS_ERR(ourport->baudclk))
  2345					clk_disable_unprepare(ourport->baudclk);
  2346				clk_disable_unprepare(ourport->clk);
  2347				break;
  2348			}
  2349		}
  2350	
  2351		return 0;
  2352	}
  2353	

---
0-DAY CI Kernel Test Service, Intel Corporation
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