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staging: gasket: core: factor out generic device add code from PCI code 

Split out generic gasket device add code from the code for adding a PCI
gasket device, in prep for other gasket device types in the future.

Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Todd Poynor 2018-08-09 20:21:06 -07:00 committed by Greg Kroah-Hartman
parent 7b49682bdc
commit 9c34e95c6f
1 changed files with 48 additions and 28 deletions
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76
drivers/staging/gasket/gasket_core.c
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@ -1419,6 +1419,48 @@ int gasket_enable_device(struct gasket_dev *gasket_dev)
}
EXPORT_SYMBOL(gasket_enable_device);
static int __gasket_add_device(struct device *parent_dev,
struct gasket_internal_desc *internal_desc,
struct gasket_dev **gasket_devp)
{
int ret;
struct gasket_dev *gasket_dev;
const struct gasket_driver_desc *driver_desc =
internal_desc->driver_desc;
ret = gasket_alloc_dev(internal_desc, parent_dev, &gasket_dev);
if (ret)
return ret;
if (IS_ERR(gasket_dev->dev_info.device)) {
dev_err(parent_dev, "Cannot create %s device %s [ret = %ld]\n",
driver_desc->name, gasket_dev->dev_info.name,
PTR_ERR(gasket_dev->dev_info.device));
ret = -ENODEV;
goto free_gasket_dev;
}
ret = gasket_sysfs_create_mapping(gasket_dev->dev_info.device,
gasket_dev);
if (ret)
goto remove_device;
ret = gasket_sysfs_create_entries(gasket_dev->dev_info.device,
gasket_sysfs_generic_attrs);
if (ret)
goto remove_sysfs_mapping;
*gasket_devp = gasket_dev;
return 0;
remove_sysfs_mapping:
gasket_sysfs_remove_mapping(gasket_dev->dev_info.device);
remove_device:
device_destroy(internal_desc->class, gasket_dev->dev_info.devt);
free_gasket_dev:
gasket_free_dev(gasket_dev);
return ret;
}
/*
* Add PCI gasket device.
*
@ -1433,7 +1475,6 @@ int gasket_pci_add_device(struct pci_dev *pci_dev,
int ret;
struct gasket_internal_desc *internal_desc;
struct gasket_dev *gasket_dev;
const struct gasket_driver_desc *driver_desc;
struct device *parent;
dev_dbg(&pci_dev->dev, "add PCI gasket device\n");
@ -1447,29 +1488,15 @@ int gasket_pci_add_device(struct pci_dev *pci_dev,
return -ENODEV;
}
driver_desc = internal_desc->driver_desc;
parent = &pci_dev->dev;
ret = gasket_alloc_dev(internal_desc, parent, &gasket_dev);
ret = __gasket_add_device(parent, internal_desc, &gasket_dev);
if (ret)
return ret;
gasket_dev->pci_dev = pci_dev;
if (IS_ERR_OR_NULL(gasket_dev->dev_info.device)) {
pr_err("Cannot create %s device %s [ret = %ld]\n",
driver_desc->name, gasket_dev->dev_info.name,
PTR_ERR(gasket_dev->dev_info.device));
ret = -ENODEV;
goto fail1;
}
gasket_dev->pci_dev = pci_dev;
ret = gasket_setup_pci(pci_dev, gasket_dev);
if (ret)
goto fail2;
ret = gasket_sysfs_create_mapping(gasket_dev->dev_info.device,
gasket_dev);
if (ret)
goto fail3;
goto cleanup_pci;
/*
* Once we've created the mapping structures successfully, attempt to
@ -1480,23 +1507,16 @@ int gasket_pci_add_device(struct pci_dev *pci_dev,
if (ret) {
dev_err(gasket_dev->dev,
"Cannot create sysfs pci link: %d\n", ret);
goto fail3;
goto cleanup_pci;
}
ret = gasket_sysfs_create_entries(gasket_dev->dev_info.device,
gasket_sysfs_generic_attrs);
if (ret)
goto fail4;
*gasket_devp = gasket_dev;
return 0;
fail4:
fail3:
gasket_sysfs_remove_mapping(gasket_dev->dev_info.device);
fail2:
cleanup_pci:
gasket_cleanup_pci(gasket_dev);
gasket_sysfs_remove_mapping(gasket_dev->dev_info.device);
device_destroy(internal_desc->class, gasket_dev->dev_info.devt);
fail1:
gasket_free_dev(gasket_dev);
return ret;
}