Hi Al, I love your patch! Perhaps something to improve: [auto build test WARNING on tty/tty-testing] [also build test WARNING on linux/master robh/for-next usb/usb-testing linus/master v5.12-rc2 next-20210305] [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/Al-Cooper/8250-Add-driver-for-Broadcom-UART/20210309-010755 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing config: nios2-allyesconfig (attached as .config) compiler: nios2-linux-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/38e38c0d5bd1fd6e256cbb0da5cd0cd1010b9cb6 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Al-Cooper/8250-Add-driver-for-Broadcom-UART/20210309-010755 git checkout 38e38c0d5bd1fd6e256cbb0da5cd0cd1010b9cb6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nios2 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): drivers/tty/serial/8250/8250_bcm7271.c: In function 'brcmuart_tx_isr': >> drivers/tty/serial/8250/8250_bcm7271.c:547:6: warning: variable 'length' set but not used [-Wunused-but-set-variable] 547 | int length; | ^~~~~~ drivers/tty/serial/8250/8250_bcm7271.c: At top level: >> drivers/tty/serial/8250/8250_bcm7271.c:1190:12: warning: no previous prototype for 'brcmuart_init' [-Wmissing-prototypes] 1190 | int __init brcmuart_init(void) | ^~~~~~~~~~~~~ >> drivers/tty/serial/8250/8250_bcm7271.c:1198:13: warning: no previous prototype for 'brcmuart_deinit' [-Wmissing-prototypes] 1198 | void __exit brcmuart_deinit(void) | ^~~~~~~~~~~~~~~ vim +/length +547 drivers/tty/serial/8250/8250_bcm7271.c 540 541 static void brcmuart_tx_isr(struct uart_port *up, u32 isr) 542 { 543 struct brcmuart_priv *priv = up->private_data; 544 struct device *dev = up->dev; 545 struct uart_8250_port *port_8250 = up_to_u8250p(up); 546 struct circ_buf *xmit = &port_8250->port.state->xmit; > 547 int length; 548 549 length = udma_readl(priv, REGS_DMA_TX, UDMA_TX_TRANSFER_TOTAL); 550 if (isr & UDMA_INTR_TX_ABORT) { 551 if (priv->tx_running) 552 dev_err(dev, "Unexpected TX_ABORT interrupt\n"); 553 return; 554 } 555 priv->tx_running = false; 556 if (!uart_circ_empty(xmit) && !uart_tx_stopped(up)) 557 brcmuart_tx_dma(port_8250); 558 } 559 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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