From: Jiang Liu <jiang.liu@xxxxxxxxxx>
According to device model documentation, the way to create/destroy PCI
devices should be symmetric.
/**
* device_del - delete device from system.
* @dev: device.
*
* This is the first part of the device unregistration
* sequence. This removes the device from the lists we control
* from here, has it removed from the other driver model
* subsystems it was added to in device_add(), and removes it
* from the kobject hierarchy.
*
* NOTE: this should be called manually _iff_ device_add() was
* also called manually.
*/
The rule is to either use
1) device_register()/device_unregister()
or
2) device_initialize()/device_add()/device_del()/put_device().
So change PCI core logic to follow the rule and get rid of the redundant
pci_dev_get()/pci_dev_put() pair.
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
drivers/pci/probe.c | 1 -
drivers/pci/remove.c | 4 ++--
2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index dcef3b9..9588207 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1298,7 +1298,6 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
{
device_initialize(&dev->dev);
dev->dev.release = pci_release_dev;
- pci_dev_get(dev);
set_dev_node(&dev->dev, pcibus_to_node(bus));
dev->dev.dma_mask = &dev->dma_mask;
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 7c0fd92..fc38c48 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -22,7 +22,7 @@ static void pci_stop_dev(struct pci_dev *dev)
if (dev->is_added) {
pci_proc_detach_device(dev);
pci_remove_sysfs_dev_files(dev);
- device_unregister(&dev->dev);
+ device_del(&dev->dev);
dev->is_added = 0;
}
@@ -37,7 +37,7 @@ static void pci_destroy_dev(struct pci_dev *dev)
up_write(&pci_bus_sem);
pci_free_resources(dev);
- pci_dev_put(dev);
+ put_device(&dev->dev);
}
void pci_remove_bus(struct pci_bus *bus)
--
1.7.10.4
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