[android-common:android-mainline 1/6] drivers/tty/serial/msm_geni_serial_earlycon.c:307:6: warning: variable 'rx_stale' set but not used

[android-common:android-mainline 1/6] drivers/tty/serial/msm_geni_serial_earlycon.c:307:6: warning: variable 'rx_stale' set but not used

[kernel test robot]

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tree:   https://android.googlesource.com/kernel/common android-mainline
head:   a44b31f34c58e6e9dca649a262e0c9986e757ed8
commit: e1be87019fc97f736f2729a2a4198d250d28633b [1/6] ANDROID: serial: msm_geni_serial_earlycon: Add Earlycon support
config: i386-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        git remote add android-common https://android.googlesource.com/kernel/common
        git fetch --no-tags android-common android-mainline
        git checkout e1be87019fc97f736f2729a2a4198d250d28633b
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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/tty/serial/msm_geni_serial_earlycon.c: In function 'msm_geni_serial_earlycon_setup':
>> drivers/tty/serial/msm_geni_serial_earlycon.c:307:6: warning: variable 'rx_stale' set but not used [-Wunused-but-set-variable]
     307 |  u32 rx_stale = 0;
         |      ^~~~~~~~
>> drivers/tty/serial/msm_geni_serial_earlycon.c:305:6: warning: variable 'rx_parity_cfg' set but not used [-Wunused-but-set-variable]
     305 |  u32 rx_parity_cfg = 0;
         |      ^~~~~~~~~~~~~
>> drivers/tty/serial/msm_geni_serial_earlycon.c:304:6: warning: variable 'rx_trans_cfg' set but not used [-Wunused-but-set-variable]
     304 |  u32 rx_trans_cfg = 0;
         |      ^~~~~~~~~~~~

vim +/rx_stale +307 drivers/tty/serial/msm_geni_serial_earlycon.c

   296	
   297	static int __init
   298	msm_geni_serial_earlycon_setup(struct earlycon_device *dev,
   299					const char *opt)
   300	{
   301		int ret = 0;
   302		u32 tx_trans_cfg = 0;
   303		u32 tx_parity_cfg = 0;
 > 304		u32 rx_trans_cfg = 0;
 > 305		u32 rx_parity_cfg = 0;
   306		u32 stop_bit = 0;
 > 307		u32 rx_stale = 0;
   308		u32 bits_per_char = 0;
   309		unsigned long cfg0, cfg1;
   310		struct uart_port *uport = &dev->port;
   311	
   312		if (!uport->membase) {
   313			ret = -ENOMEM;
   314			goto exit;
   315		}
   316	
   317		if (get_se_proto_earlycon(uport->membase) != UART_PROTOCOL) {
   318			ret = -ENXIO;
   319			goto exit;
   320		}
   321	
   322		/*
   323		 * Ignore Flow control.
   324		 * Disable Tx Parity.
   325		 * Don't check Parity during Rx.
   326		 * Disable Rx Parity.
   327		 * n = 8.
   328		 * Stop bit = 0.
   329		 * Stale timeout in bit-time (3 chars worth).
   330		 */
   331		tx_trans_cfg |= UART_CTS_MASK;
   332		tx_parity_cfg = 0;
   333		rx_trans_cfg = 0;
   334		rx_parity_cfg = 0;
   335		bits_per_char = 0x8;
   336		stop_bit = 0;
   337		rx_stale = 0x18;
   338	
   339		msm_geni_serial_poll_abort_tx(uport);
   340	
   341		se_get_packing_config_earlycon(8, 1, false, &cfg0, &cfg1);
   342	
   343		se_io_init_earlycon(uport->membase);
   344	
   345		geni_se_select_fifo_mode_earlycon(uport->membase);
   346		writel_relaxed(cfg0, uport->membase + SE_GENI_TX_PACKING_CFG0);
   347		writel_relaxed(cfg1, uport->membase + SE_GENI_TX_PACKING_CFG1);
   348		writel_relaxed(tx_trans_cfg, uport->membase + SE_UART_TX_TRANS_CFG);
   349		writel_relaxed(tx_parity_cfg, uport->membase + SE_UART_TX_PARITY_CFG);
   350		writel_relaxed(bits_per_char, uport->membase + SE_UART_TX_WORD_LEN);
   351		writel_relaxed(stop_bit, uport->membase + SE_UART_TX_STOP_BIT_LEN);
   352	
   353		dev->con->write = msm_geni_serial_early_console_write;
   354		dev->con->setup = NULL;
   355	exit:
   356		return ret;
   357	}
   358	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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