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[PATCH] use device_for_each_child() to properly access child devices.

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On Friday, March 25, 2005 8:47 PM Greg KH wrote:
>Here's a fix for pci express.  For some reason I don't think they are
>using the driver model properly here, but I could be wrong...

Thanks for making the changes. However, changes in functions:
void pcie_port_device_remove(struct pci_dev *dev) and
static int remove_iter(struct device *dev, void *data)
are not correct. Please use the patch, which is based on kernel
2.6.12-rc1, below for a fix for these.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
long 2005-03-29 13:36:43 -08:00 committed by Greg Kroah-Hartman
parent 64360322ab
commit d0e2b4a0a9
1 changed files with 65 additions and 74 deletions
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117
drivers/pci/pcie/portdrv_core.c
View file

@ -232,9 +232,6 @@ static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev,
/* Initialize generic device interface */
device = &dev->device;
memset(device, 0, sizeof(struct device));
INIT_LIST_HEAD(&device->node);
INIT_LIST_HEAD(&device->children);
INIT_LIST_HEAD(&device->bus_list);
device->bus = &pcie_port_bus_type;
device->driver = NULL;
device->driver_data = NULL;
@ -317,84 +314,78 @@ int pcie_port_device_register(struct pci_dev *dev)
}
#ifdef CONFIG_PM
int pcie_port_device_suspend(struct pci_dev *dev, pm_message_t state)
static int suspend_iter(struct device *dev, void *data)
{
struct pcie_port_service_driver *service_driver;
u32 state = (u32)data;
if ((dev->bus == &pcie_port_bus_type) &&
(dev->driver)) {
service_driver = to_service_driver(dev->driver);
if (service_driver->suspend)
service_driver->suspend(to_pcie_device(dev), state);
}
return 0;
}
int pcie_port_device_suspend(struct pci_dev *dev, u32 state)
{
device_for_each_child(&dev->dev, (void *)state, suspend_iter);
return 0;
}
static int resume_iter(struct device *dev, void *data)
{
struct list_head *head, *tmp;
struct device *parent, *child;
struct device_driver *driver;
struct pcie_port_service_driver *service_driver;
parent = &dev->dev;
head = &parent->children;
tmp = head->next;
while (head != tmp) {
child = container_of(tmp, struct device, node);
tmp = tmp->next;
if (child->bus != &pcie_port_bus_type)
continue;
driver = child->driver;
if (!driver)
continue;
service_driver = to_service_driver(driver);
if (service_driver->suspend)
service_driver->suspend(to_pcie_device(child), state);
if ((dev->bus == &pcie_port_bus_type) &&
(dev->driver)) {
service_driver = to_service_driver(dev->driver);
if (service_driver->resume)
service_driver->resume(to_pcie_device(dev));
}
return 0;
}
int pcie_port_device_resume(struct pci_dev *dev)
{
struct list_head *head, *tmp;
struct device *parent, *child;
struct device_driver *driver;
struct pcie_port_service_driver *service_driver;
parent = &dev->dev;
head = &parent->children;
tmp = head->next;
while (head != tmp) {
child = container_of(tmp, struct device, node);
tmp = tmp->next;
if (child->bus != &pcie_port_bus_type)
continue;
driver = child->driver;
if (!driver)
continue;
service_driver = to_service_driver(driver);
if (service_driver->resume)
service_driver->resume(to_pcie_device(child));
}
device_for_each_child(&dev->dev, NULL, resume_iter);
return 0;
}
#endif
static int remove_iter(struct device *dev, void *data)
{
struct pcie_port_service_driver *service_driver;
if (dev->bus == &pcie_port_bus_type) {
if (dev->driver) {
service_driver = to_service_driver(dev->driver);
if (service_driver->remove)
service_driver->remove(to_pcie_device(dev));
}
*(unsigned long*)data = (unsigned long)dev;
return 1;
}
return 0;
}
void pcie_port_device_remove(struct pci_dev *dev)
{
struct list_head *head, *tmp;
struct device *parent, *child;
struct device_driver *driver;
struct pcie_port_service_driver *service_driver;
struct device *device;
unsigned long device_addr;
int interrupt_mode = PCIE_PORT_INTx_MODE;
int status;
parent = &dev->dev;
head = &parent->children;
tmp = head->next;
while (head != tmp) {
child = container_of(tmp, struct device, node);
tmp = tmp->next;
if (child->bus != &pcie_port_bus_type)
continue;
driver = child->driver;
if (driver) {
service_driver = to_service_driver(driver);
if (service_driver->remove)
service_driver->remove(to_pcie_device(child));
do {
status = device_for_each_child(&dev->dev, &device_addr, remove_iter);
if (status) {
device = (struct device*)device_addr;
interrupt_mode = (to_pcie_device(device))->interrupt_mode;
put_device(device);
device_unregister(device);
}
interrupt_mode = (to_pcie_device(child))->interrupt_mode;
put_device(child);
device_unregister(child);
}
} while (status);
/* Switch to INTx by default if MSI enabled */
if (interrupt_mode == PCIE_PORT_MSIX_MODE)
pci_disable_msix(dev);