Re: [PATCH 4/4] tty: serial: qcom_geni_serial: Add GPI DMA support

[kernel test robot <lkp@intel.com>]

Hi Naresh,

kernel test robot noticed the following build warnings:

[auto build test WARNING on aac26bee2287c88af5be5a5ff96d783b19a28790]

url:    https://github.com/intel-lab-lkp/linux/commits/Naresh-Maramaina/dmaengine-qcom-gpi-Add-UART-transfer-support/20261009-122753
base:   aac26bee2287c88af5be5a5ff96d783b19a28790
patch link:    https://lore.kernel.org/r/20261009-add-gpi-dma-support-for-uart-v1-4-c69e728df686%40oss.qualcomm.com
patch subject: [PATCH 4/4] tty: serial: qcom_geni_serial: Add GPI DMA support
config: arc-allmodconfig (https://download.01.org/0day-ci/archive/20261010/202610100800.CCtA9f8L-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261010/202610100800.CCtA9f8L-lkp@intel.com/reproduce)

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
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610100800.CCtA9f8L-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/tty/serial/qcom_geni_serial.c: In function 'qcom_geni_serial_gpi_tx_unmap':
>> drivers/tty/serial/qcom_geni_serial.c:1424:29: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    1424 |         port->tx_dma_addr = (dma_addr_t)NULL;
         |                             ^
   drivers/tty/serial/qcom_geni_serial.c: In function 'qcom_geni_serial_gpi_tx_xfer_work':
   drivers/tty/serial/qcom_geni_serial.c:1613:37: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    1613 |                 port->tx_dma_addr = (dma_addr_t)NULL;
         |                                     ^
   drivers/tty/serial/qcom_geni_serial.c: In function 'qcom_geni_serial_unprepare_gpi_rx_dma':
   drivers/tty/serial/qcom_geni_serial.c:1670:47: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    1670 |                         gpi->rx_dma_addr[i] = (dma_addr_t)NULL;
         |                                               ^


vim +1424 drivers/tty/serial/qcom_geni_serial.c

  1414	
  1415	static void qcom_geni_serial_gpi_tx_unmap(struct qcom_geni_serial_port *port)
  1416	{
  1417		struct qcom_geni_serial_gpi *gpi = port->gpi;
  1418	
  1419		if (!port->tx_dma_addr)
  1420			return;
  1421	
  1422		dma_unmap_single(port->se.dev->parent, port->tx_dma_addr,
  1423				 gpi->xmit_size, DMA_TO_DEVICE);
> 1424		port->tx_dma_addr = (dma_addr_t)NULL;
  1425	}
  1426	

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