drivers/tty/serial/cpm_uart.c:1533:5-20: WARNING: Unsigned expression compared with zero: pinfo -> port . irq < 0

drivers/tty/serial/cpm_uart.c:1533:5-20: WARNING: Unsigned expression compared with zero: pinfo -> port . irq < 0

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Rosen Penev <rosenp@gmail.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   6addb4f385570ebc11c4eb499a4f1c149f313e84
commit: 831603b3e8aa3892de229fda846b2f859c518699 serial: cpm_uart: replace irq_of_parse_and_map with platform_get_irq
date:   3 months ago
:::::: branch date: 4 hours ago
:::::: commit date: 3 months ago
config: powerpc-randconfig-r2105-20261004 (https://download.01.org/0day-ci/archive/20261004/202610041027.gpXgSTFO-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project d7e4505dd447d115d85fdea45cd71030ac1d86ee)

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
| Fixes: 831603b3e8aa ("serial: cpm_uart: replace irq_of_parse_and_map with platform_get_irq")
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Julia Lawall <julia.lawall@inria.fr>
| Closes: https://lore.kernel.org/r/202610041027.gpXgSTFO-lkp@intel.com/

cocci warnings: (new ones prefixed by >>)
>> drivers/tty/serial/cpm_uart.c:1533:5-20: WARNING: Unsigned expression compared with zero: pinfo -> port . irq < 0

vim +1533 drivers/tty/serial/cpm_uart.c

7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1515  
9671f09921d93e7 drivers/tty/serial/cpm_uart/cpm_uart_core.c Bill Pemberton   2012-11-19  1516  static int cpm_uart_probe(struct platform_device *ofdev)
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1517  {
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1518  	int index = probe_index++;
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1519  	struct uart_cpm_port *pinfo = &cpm_uart_ports[index];
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1520  	int ret;
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1521  
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1522  	pinfo->port.line = index;
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1523  
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1524  	if (index >= UART_NR)
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1525  		return -ENODEV;
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1526  
696faedd616e202 drivers/tty/serial/cpm_uart/cpm_uart_core.c Jingoo Han       2013-05-23  1527  	platform_set_drvdata(ofdev, pinfo);
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1528  
bd86ef378412fc3 drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2009-04-03  1529  	/* initialize the device pointer for the port */
bd86ef378412fc3 drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2009-04-03  1530  	pinfo->port.dev = &ofdev->dev;
bd86ef378412fc3 drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2009-04-03  1531  
831603b3e8aa389 drivers/tty/serial/cpm_uart.c               Rosen Penev      2026-06-06  1532  	pinfo->port.irq = platform_get_irq(ofdev, 0);
831603b3e8aa389 drivers/tty/serial/cpm_uart.c               Rosen Penev      2026-06-06 @1533  	if (pinfo->port.irq < 0)
831603b3e8aa389 drivers/tty/serial/cpm_uart.c               Rosen Penev      2026-06-06  1534  		return pinfo->port.irq;
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1535  
30963b2f75bfdbb drivers/tty/serial/cpm_uart/cpm_uart_core.c Christophe Leroy 2022-09-30  1536  	ret = cpm_uart_init_port(ofdev->dev.of_node, pinfo);
30963b2f75bfdbb drivers/tty/serial/cpm_uart/cpm_uart_core.c Christophe Leroy 2022-09-30  1537  	if (!ret)
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1538  		return uart_add_one_port(&cpm_reg, &pinfo->port);
30963b2f75bfdbb drivers/tty/serial/cpm_uart/cpm_uart_core.c Christophe Leroy 2022-09-30  1539  
30963b2f75bfdbb drivers/tty/serial/cpm_uart/cpm_uart_core.c Christophe Leroy 2022-09-30  1540  	return ret;
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1541  }
7ae870368d198af drivers/serial/cpm_uart/cpm_uart_core.c     Scott Wood       2007-07-17  1542  

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