Hi Pujin, Thank you for the patch! Yet something to improve: [auto build test ERROR on usb/usb-testing] [also build test ERROR on v5.9-rc8] [cannot apply to tty/tty-testing next-20201002] [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/Pujin-Shi/tty-serial-mvebu-uart-Remove-unused-variable-ret/20200930-161555 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: powerpc-randconfig-r035-20201005 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 39fc4a0b0af69772ee360b5f729b1ec453217793) 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 # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://github.com/0day-ci/linux/commit/c2857134bbb1c0f004f4d026e62a2b90aa2015a0 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Pujin-Shi/tty-serial-mvebu-uart-Remove-unused-variable-ret/20200930-161555 git checkout c2857134bbb1c0f004f4d026e62a2b90aa2015a0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): >> drivers/tty/serial/mvebu-uart.c:915:2: error: use of undeclared identifier 'ret'; did you mean 'reg'? ret = uart_add_one_port(&mvebu_uart_driver, port); ^~~ reg drivers/tty/serial/mvebu-uart.c:801:19: note: 'reg' declared here struct resource *reg = platform_get_resource(pdev, IORESOURCE_MEM, 0); ^ >> drivers/tty/serial/mvebu-uart.c:915:6: warning: incompatible integer to pointer conversion assigning to 'struct resource *' from 'int' [-Wint-conversion] ret = uart_add_one_port(&mvebu_uart_driver, port); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/tty/serial/mvebu-uart.c:916:6: error: use of undeclared identifier 'ret'; did you mean 'reg'? if (ret) ^~~ reg drivers/tty/serial/mvebu-uart.c:801:19: note: 'reg' declared here struct resource *reg = platform_get_resource(pdev, IORESOURCE_MEM, 0); ^ drivers/tty/serial/mvebu-uart.c:917:10: error: use of undeclared identifier 'ret'; did you mean 'reg'? return ret; ^~~ reg drivers/tty/serial/mvebu-uart.c:801:19: note: 'reg' declared here struct resource *reg = platform_get_resource(pdev, IORESOURCE_MEM, 0); ^ >> drivers/tty/serial/mvebu-uart.c:917:10: warning: incompatible pointer to integer conversion returning 'struct resource *' from a function with result type 'int' [-Wint-conversion] return ret; ^~~ 2 warnings and 3 errors generated. vim +915 drivers/tty/serial/mvebu-uart.c 94228f9561bb6c Allen Yan 2017-10-13 798 30530791a7a032 Wilson Ding 2016-02-16 799 static int mvebu_uart_probe(struct platform_device *pdev) 30530791a7a032 Wilson Ding 2016-02-16 800 { 30530791a7a032 Wilson Ding 2016-02-16 801 struct resource *reg = platform_get_resource(pdev, IORESOURCE_MEM, 0); 5218d76958644a Miquel Raynal 2017-10-13 802 const struct of_device_id *match = of_match_device(mvebu_uart_of_match, 5218d76958644a Miquel Raynal 2017-10-13 803 &pdev->dev); 30530791a7a032 Wilson Ding 2016-02-16 804 struct uart_port *port; 5218d76958644a Miquel Raynal 2017-10-13 805 struct mvebu_uart *mvuart; c2857134bbb1c0 Pujin Shi 2020-09-30 806 int id, irq; 30530791a7a032 Wilson Ding 2016-02-16 807 95f787685a224e Miquel Raynal 2017-10-13 808 if (!reg) { 95f787685a224e Miquel Raynal 2017-10-13 809 dev_err(&pdev->dev, "no registers defined\n"); 30530791a7a032 Wilson Ding 2016-02-16 810 return -EINVAL; 30530791a7a032 Wilson Ding 2016-02-16 811 } 30530791a7a032 Wilson Ding 2016-02-16 812 32f47179833b63 Aditya Pakki 2019-03-18 813 if (!match) 32f47179833b63 Aditya Pakki 2019-03-18 814 return -ENODEV; 32f47179833b63 Aditya Pakki 2019-03-18 815 94228f9561bb6c Allen Yan 2017-10-13 816 /* Assume that all UART ports have a DT alias or none has */ 94228f9561bb6c Allen Yan 2017-10-13 817 id = of_alias_get_id(pdev->dev.of_node, "serial"); 94228f9561bb6c Allen Yan 2017-10-13 818 if (!pdev->dev.of_node || id < 0) 94228f9561bb6c Allen Yan 2017-10-13 819 pdev->id = uart_num_counter++; 94228f9561bb6c Allen Yan 2017-10-13 820 else 94228f9561bb6c Allen Yan 2017-10-13 821 pdev->id = id; 94228f9561bb6c Allen Yan 2017-10-13 822 94228f9561bb6c Allen Yan 2017-10-13 823 if (pdev->id >= MVEBU_NR_UARTS) { 94228f9561bb6c Allen Yan 2017-10-13 824 dev_err(&pdev->dev, "cannot have more than %d UART ports\n", 94228f9561bb6c Allen Yan 2017-10-13 825 MVEBU_NR_UARTS); 94228f9561bb6c Allen Yan 2017-10-13 826 return -EINVAL; 94228f9561bb6c Allen Yan 2017-10-13 827 } 94228f9561bb6c Allen Yan 2017-10-13 828 94228f9561bb6c Allen Yan 2017-10-13 829 port = &mvebu_uart_ports[pdev->id]; 30530791a7a032 Wilson Ding 2016-02-16 830 30530791a7a032 Wilson Ding 2016-02-16 831 spin_lock_init(&port->lock); 30530791a7a032 Wilson Ding 2016-02-16 832 30530791a7a032 Wilson Ding 2016-02-16 833 port->dev = &pdev->dev; 30530791a7a032 Wilson Ding 2016-02-16 834 port->type = PORT_MVEBU; 30530791a7a032 Wilson Ding 2016-02-16 835 port->ops = &mvebu_uart_ops; 30530791a7a032 Wilson Ding 2016-02-16 836 port->regshift = 0; 30530791a7a032 Wilson Ding 2016-02-16 837 30530791a7a032 Wilson Ding 2016-02-16 838 port->fifosize = 32; 30530791a7a032 Wilson Ding 2016-02-16 839 port->iotype = UPIO_MEM32; 30530791a7a032 Wilson Ding 2016-02-16 840 port->flags = UPF_FIXED_PORT; 94228f9561bb6c Allen Yan 2017-10-13 841 port->line = pdev->id; 30530791a7a032 Wilson Ding 2016-02-16 842 95f787685a224e Miquel Raynal 2017-10-13 843 /* 95f787685a224e Miquel Raynal 2017-10-13 844 * IRQ number is not stored in this structure because we may have two of 95f787685a224e Miquel Raynal 2017-10-13 845 * them per port (RX and TX). Instead, use the driver UART structure 95f787685a224e Miquel Raynal 2017-10-13 846 * array so called ->irq[]. 95f787685a224e Miquel Raynal 2017-10-13 847 */ 95f787685a224e Miquel Raynal 2017-10-13 848 port->irq = 0; 30530791a7a032 Wilson Ding 2016-02-16 849 port->irqflags = 0; 30530791a7a032 Wilson Ding 2016-02-16 850 port->mapbase = reg->start; 30530791a7a032 Wilson Ding 2016-02-16 851 30530791a7a032 Wilson Ding 2016-02-16 852 port->membase = devm_ioremap_resource(&pdev->dev, reg); 30530791a7a032 Wilson Ding 2016-02-16 853 if (IS_ERR(port->membase)) 4a3e208474204e tangbin 2020-03-05 854 return PTR_ERR(port->membase); 30530791a7a032 Wilson Ding 2016-02-16 855 5218d76958644a Miquel Raynal 2017-10-13 856 mvuart = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_uart), 30530791a7a032 Wilson Ding 2016-02-16 857 GFP_KERNEL); 5218d76958644a Miquel Raynal 2017-10-13 858 if (!mvuart) 30530791a7a032 Wilson Ding 2016-02-16 859 return -ENOMEM; 30530791a7a032 Wilson Ding 2016-02-16 860 68a0db1d7da20f Allen Yan 2017-10-13 861 /* Get controller data depending on the compatible string */ 5218d76958644a Miquel Raynal 2017-10-13 862 mvuart->data = (struct mvebu_uart_driver_data *)match->data; 5218d76958644a Miquel Raynal 2017-10-13 863 mvuart->port = port; 30530791a7a032 Wilson Ding 2016-02-16 864 5218d76958644a Miquel Raynal 2017-10-13 865 port->private_data = mvuart; 5218d76958644a Miquel Raynal 2017-10-13 866 platform_set_drvdata(pdev, mvuart); 30530791a7a032 Wilson Ding 2016-02-16 867 68a0db1d7da20f Allen Yan 2017-10-13 868 /* Get fixed clock frequency */ 68a0db1d7da20f Allen Yan 2017-10-13 869 mvuart->clk = devm_clk_get(&pdev->dev, NULL); 68a0db1d7da20f Allen Yan 2017-10-13 870 if (IS_ERR(mvuart->clk)) { 68a0db1d7da20f Allen Yan 2017-10-13 871 if (PTR_ERR(mvuart->clk) == -EPROBE_DEFER) 68a0db1d7da20f Allen Yan 2017-10-13 872 return PTR_ERR(mvuart->clk); 68a0db1d7da20f Allen Yan 2017-10-13 873 68a0db1d7da20f Allen Yan 2017-10-13 874 if (IS_EXTENDED(port)) { 68a0db1d7da20f Allen Yan 2017-10-13 875 dev_err(&pdev->dev, "unable to get UART clock\n"); 68a0db1d7da20f Allen Yan 2017-10-13 876 return PTR_ERR(mvuart->clk); 68a0db1d7da20f Allen Yan 2017-10-13 877 } 68a0db1d7da20f Allen Yan 2017-10-13 878 } else { 68a0db1d7da20f Allen Yan 2017-10-13 879 if (!clk_prepare_enable(mvuart->clk)) 68a0db1d7da20f Allen Yan 2017-10-13 880 port->uartclk = clk_get_rate(mvuart->clk); 68a0db1d7da20f Allen Yan 2017-10-13 881 } 68a0db1d7da20f Allen Yan 2017-10-13 882 95f787685a224e Miquel Raynal 2017-10-13 883 /* Manage interrupts */ 95f787685a224e Miquel Raynal 2017-10-13 884 if (platform_irq_count(pdev) == 1) { 95f787685a224e Miquel Raynal 2017-10-13 885 /* Old bindings: no name on the single unamed UART0 IRQ */ 95f787685a224e Miquel Raynal 2017-10-13 886 irq = platform_get_irq(pdev, 0); 1df217868178bd Stephen Boyd 2019-07-30 887 if (irq < 0) 95f787685a224e Miquel Raynal 2017-10-13 888 return irq; 95f787685a224e Miquel Raynal 2017-10-13 889 95f787685a224e Miquel Raynal 2017-10-13 890 mvuart->irq[UART_IRQ_SUM] = irq; 95f787685a224e Miquel Raynal 2017-10-13 891 } else { 95f787685a224e Miquel Raynal 2017-10-13 892 /* 95f787685a224e Miquel Raynal 2017-10-13 893 * New bindings: named interrupts (RX, TX) for both UARTS, 95f787685a224e Miquel Raynal 2017-10-13 894 * only make use of uart-rx and uart-tx interrupts, do not use 95f787685a224e Miquel Raynal 2017-10-13 895 * uart-sum of UART0 port. 95f787685a224e Miquel Raynal 2017-10-13 896 */ 95f787685a224e Miquel Raynal 2017-10-13 897 irq = platform_get_irq_byname(pdev, "uart-rx"); 1df217868178bd Stephen Boyd 2019-07-30 898 if (irq < 0) 95f787685a224e Miquel Raynal 2017-10-13 899 return irq; 95f787685a224e Miquel Raynal 2017-10-13 900 95f787685a224e Miquel Raynal 2017-10-13 901 mvuart->irq[UART_RX_IRQ] = irq; 95f787685a224e Miquel Raynal 2017-10-13 902 95f787685a224e Miquel Raynal 2017-10-13 903 irq = platform_get_irq_byname(pdev, "uart-tx"); 1df217868178bd Stephen Boyd 2019-07-30 904 if (irq < 0) 95f787685a224e Miquel Raynal 2017-10-13 905 return irq; 95f787685a224e Miquel Raynal 2017-10-13 906 95f787685a224e Miquel Raynal 2017-10-13 907 mvuart->irq[UART_TX_IRQ] = irq; 95f787685a224e Miquel Raynal 2017-10-13 908 } 95f787685a224e Miquel Raynal 2017-10-13 909 9c3d3ee1239bab Allen Yan 2017-10-13 910 /* UART Soft Reset*/ 9c3d3ee1239bab Allen Yan 2017-10-13 911 writel(CTRL_SOFT_RST, port->membase + UART_CTRL(port)); 9c3d3ee1239bab Allen Yan 2017-10-13 912 udelay(1); 9c3d3ee1239bab Allen Yan 2017-10-13 913 writel(0, port->membase + UART_CTRL(port)); 9c3d3ee1239bab Allen Yan 2017-10-13 914 30530791a7a032 Wilson Ding 2016-02-16 @915 ret = uart_add_one_port(&mvebu_uart_driver, port); 30530791a7a032 Wilson Ding 2016-02-16 916 if (ret) 30530791a7a032 Wilson Ding 2016-02-16 @917 return ret; 30530791a7a032 Wilson Ding 2016-02-16 918 return 0; 30530791a7a032 Wilson Ding 2016-02-16 919 } 30530791a7a032 Wilson Ding 2016-02-16 920 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
Attachment:
.config.gz
Description: application/gzip
