drivers/hid/intel-ish-hid/ipc/ipc.c:685:13: sparse: sparse: invalid assignment: |=

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1b8af6552cb7c9bf1194e871f8d733a19b113230
commit: ae02e5d40d5f829c589412c6253f925e35cf7a22 HID: intel-ish-hid: ipc layer
date:   7 years ago
config: x86_64-randconfig-123-20231101 (https://download.01.org/0day-ci/archive/20231203/202312031125.9fIHZZo5-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231203/202312031125.9fIHZZo5-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/202312031125.9fIHZZo5-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/hid/intel-ish-hid/ipc/ipc.c:685:13: sparse: sparse: invalid assignment: |=
>> drivers/hid/intel-ish-hid/ipc/ipc.c:685:13: sparse:    left side has type unsigned short
>> drivers/hid/intel-ish-hid/ipc/ipc.c:685:13: sparse:    right side has type restricted pci_power_t
   drivers/hid/intel-ish-hid/ipc/ipc.c:691:13: sparse: sparse: invalid assignment: |=
   drivers/hid/intel-ish-hid/ipc/ipc.c:691:13: sparse:    left side has type unsigned short
   drivers/hid/intel-ish-hid/ipc/ipc.c:691:13: sparse:    right side has type restricted pci_power_t
   In file included from include/linux/kobject.h:21,
                    from include/linux/device.h:17,
                    from drivers/hid/intel-ish-hid/ishtp/bus.h:18,
                    from drivers/hid/intel-ish-hid/ishtp/ishtp-dev.h:21,
                    from drivers/hid/intel-ish-hid/ishtp/client.h:20,
                    from drivers/hid/intel-ish-hid/ipc/ipc.c:20:
   include/linux/sysfs.h: In function 'sysfs_get_dirent':
   include/linux/sysfs.h:517:44: warning: pointer targets in passing argument 2 of 'kernfs_find_and_get' differ in signedness [-Wpointer-sign]
     517 |         return kernfs_find_and_get(parent, name);
         |                                            ^~~~
         |                                            |
         |                                            const unsigned char *
   In file included from include/linux/sysfs.h:15,
                    from include/linux/kobject.h:21,
                    from include/linux/device.h:17,
                    from drivers/hid/intel-ish-hid/ishtp/bus.h:18,
                    from drivers/hid/intel-ish-hid/ishtp/ishtp-dev.h:21,
                    from drivers/hid/intel-ish-hid/ishtp/client.h:20,
                    from drivers/hid/intel-ish-hid/ipc/ipc.c:20:
   include/linux/kernfs.h:440:57: note: expected 'const char *' but argument is of type 'const unsigned char *'
     440 | kernfs_find_and_get(struct kernfs_node *kn, const char *name)
         |                                             ~~~~~~~~~~~~^~~~

vim +685 drivers/hid/intel-ish-hid/ipc/ipc.c

   640	
   641	/**
   642	 * _ish_hw_reset() - HW reset
   643	 * @dev: ishtp device pointer
   644	 *
   645	 * Reset ISH HW to recover if any error
   646	 *
   647	 * Return: 0 for success else error fault code
   648	 */
   649	static int _ish_hw_reset(struct ishtp_device *dev)
   650	{
   651		struct pci_dev *pdev = dev->pdev;
   652		int	rv;
   653		unsigned int	dma_delay;
   654		uint16_t csr;
   655	
   656		if (!pdev)
   657			return	-ENODEV;
   658	
   659		rv = pci_reset_function(pdev);
   660		if (!rv)
   661			dev->dev_state = ISHTP_DEV_RESETTING;
   662	
   663		if (!pdev->pm_cap) {
   664			dev_err(&pdev->dev, "Can't reset - no PM caps\n");
   665			return	-EINVAL;
   666		}
   667	
   668		/* Now trigger reset to FW */
   669		ish_reg_write(dev, IPC_REG_ISH_RMP2, 0);
   670	
   671		for (dma_delay = 0; dma_delay < MAX_DMA_DELAY &&
   672			_ish_read_fw_sts_reg(dev) & (IPC_ISH_IN_DMA);
   673			dma_delay += 5)
   674			mdelay(5);
   675	
   676		if (dma_delay >= MAX_DMA_DELAY) {
   677			dev_err(&pdev->dev,
   678				"Can't reset - stuck with DMA in-progress\n");
   679			return	-EBUSY;
   680		}
   681	
   682		pci_read_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, &csr);
   683	
   684		csr &= ~PCI_PM_CTRL_STATE_MASK;
 > 685		csr |= PCI_D3hot;
   686		pci_write_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, csr);
   687	
   688		mdelay(pdev->d3_delay);
   689	
   690		csr &= ~PCI_PM_CTRL_STATE_MASK;
   691		csr |= PCI_D0;
   692		pci_write_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, csr);
   693	
   694		ish_reg_write(dev, IPC_REG_ISH_RMP2, IPC_RMP2_DMA_ENABLED);
   695	
   696		/*
   697		 * Send 0 IPC message so that ISH FW wakes up if it was already
   698		 * asleep
   699		 */
   700		ish_reg_write(dev, IPC_REG_HOST2ISH_DRBL, IPC_DRBL_BUSY_BIT);
   701	
   702		/* Flush writes to doorbell and REMAP2 */
   703		ish_reg_read(dev, IPC_REG_ISH_HOST_FWSTS);
   704	
   705		return	0;
   706	}
   707	

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