| Message ID | 20131219221019.GB15201@google.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Thu, Dec 19, 2013 at 03:10:19PM -0700, Bjorn Helgaas wrote: > [+cc Greg, Yinghai] > > On Thu, Dec 19, 2013 at 04:06:46PM +0100, Levente Kurusa wrote: > > This is required so that we give up the last reference to the device. > > Removed the kfree() as put_device will result in release_pcie_device being > > called and hence the container of the device will be kfree'd. > > > > Signed-off-by: Levente Kurusa <levex@linux.com> > > Thanks, I applied a slightly modified version of this to my pci/deletion > branch for v3.14. > > I think the get_device() after device_register() succeeds and the > put_device() before device_unregister() are superfluous, so I propose the > series included below. Any comments? Looks good to me. greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Thu, Dec 19, 2013 at 2:10 PM, Bjorn Helgaas <bhelgaas@google.com> wrote: > [+cc Greg, Yinghai] > > On Thu, Dec 19, 2013 at 04:06:46PM +0100, Levente Kurusa wrote: >> This is required so that we give up the last reference to the device. >> Removed the kfree() as put_device will result in release_pcie_device being >> called and hence the container of the device will be kfree'd. >> >> Signed-off-by: Levente Kurusa <levex@linux.com> > > Thanks, I applied a slightly modified version of this to my pci/deletion > branch for v3.14. > > I think the get_device() after device_register() succeeds and the > put_device() before device_unregister() are superfluous, so I propose the > series included below. Any comments? Nice cleanup. Thanks Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 0b6e76604068..fc86d323fecc 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -344,11 +344,13 @@ static int pcie_device_init(struct pci_dev *pdev, int service, int irq) device_enable_async_suspend(device); retval = device_register(device); - if (retval) + if (retval) { kfree(pcie); - else - get_device(device); - return retval; + return retval; + } + + get_device(device); + return 0; } /** @@ -498,12 +500,12 @@ static int pcie_port_probe_service(struct device *dev) pciedev = to_pcie_device(dev); status = driver->probe(pciedev); - if (!status) { - dev_printk(KERN_DEBUG, dev, "service driver %s loaded\n", - driver->name); - get_device(dev); - } - return status; + if (status) + return status; + + dev_printk(KERN_DEBUG, dev, "service driver %s loaded\n", driver->name); + get_device(dev); + return 0; } /** commit f39862058e1f278e0495cd9ea57de571e74aa1fe Author: Levente Kurusa <levex@linux.com> Date: Thu Dec 19 14:22:35 2013 -0700 PCI/portdrv: Add put_device() after device_register() failure This is required so that we give up the last reference to the device. Removed the kfree() as put_device will result in release_pcie_device() being called and hence the container of the device will be kfree'd. [bhelgaas: fix conflict after my previous cleanup] Signed-off-by: Levente Kurusa <levex@linux.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index fc86d323fecc..9811eea53511 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -345,7 +345,7 @@ static int pcie_device_init(struct pci_dev *pdev, int service, int irq) retval = device_register(device); if (retval) { - kfree(pcie); + put_device(device); return retval; } commit e75f34ce6633549486a044d64b2a79240d4113a8 Author: Bjorn Helgaas <bhelgaas@google.com> Date: Thu Dec 19 14:24:13 2013 -0700 PCI/portdrv: Remove extra get_device()/put_device() for pcie_device Previously pcie_device_init() called get_device() if device_register() for the new pcie_device succeeded, and remove_iter() called put_device() when removing before unregistering the device. But device_register() already increments the reference count in device_add(), so we don't need to do it again here. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 9811eea53511..6a6e54909335 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -349,7 +349,6 @@ static int pcie_device_init(struct pci_dev *pdev, int service, int irq) return retval; } - get_device(device); return 0; } @@ -456,10 +455,8 @@ int pcie_port_device_resume(struct device *dev) static int remove_iter(struct device *dev, void *data) { - if (dev->bus == &pcie_port_bus_type) { - put_device(dev); + if (dev->bus == &pcie_port_bus_type) device_unregister(dev); - } return 0; }