C++ (Cpp) device_remove_file_self Examples

Example #1

File: pci_sysfs.c Project: 0-T-0/ps4-linux

static ssize_t recover_store(struct device *dev, struct device_attribute *attr,
			     const char *buf, size_t count)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct zpci_dev *zdev = to_zpci(pdev);
	int ret;

	if (!device_remove_file_self(dev, attr))
		return count;

	pci_lock_rescan_remove();
	pci_stop_and_remove_bus_device(pdev);
	ret = zpci_disable_device(zdev);
	if (ret)
		goto error;

	ret = zpci_enable_device(zdev);
	if (ret)
		goto error;

	pci_rescan_bus(zdev->bus);
	pci_unlock_rescan_remove();

	return count;

error:
	pci_unlock_rescan_remove();
	return ret;
}

Example #2

File: ccwgroup.c Project: 7799/linux

static ssize_t ccwgroup_ungroup_store(struct device *dev,
				      struct device_attribute *attr,
				      const char *buf, size_t count)
{
	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
	int rc;

	/* Prevent concurrent online/offline processing and ungrouping. */
	if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
		return -EAGAIN;
	if (gdev->state != CCWGROUP_OFFLINE) {
		rc = -EINVAL;
		goto out;
	}

	if (device_remove_file_self(dev, attr))
		ccwgroup_ungroup(gdev);
out:
	if (rc) {
		if (rc != -EAGAIN)
			/* Release onoff "lock" when ungrouping failed. */
			atomic_set(&gdev->onoff, 0);
		return rc;
	}
	return count;
}