Hi Jan,
On Tue, Jun 21, 2016 at 08:07:50PM +0200, Jan Kiszka wrote:
> Particularly useful when working in virtual environments where the
> controller may come and go, but possibly not only there.
>
> Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
> ---
> drivers/pci/ecam.h | 1 +
> drivers/pci/host/pci-host-common.c | 13 +++++++++++++
> drivers/pci/host/pci-host-generic.c | 1 +
> 3 files changed, 15 insertions(+)
>
> diff --git a/drivers/pci/ecam.h b/drivers/pci/ecam.h
> index 9878beb..5a5f607 100644
> --- a/drivers/pci/ecam.h
> +++ b/drivers/pci/ecam.h
> @@ -63,5 +63,6 @@ extern struct pci_ecam_ops pci_generic_ecam_ops;
> /* for DT-based PCI controllers that support ECAM */
> int pci_host_common_probe(struct platform_device *pdev,
> struct pci_ecam_ops *ops);
> +int pci_host_common_remove(struct platform_device *pdev);
> #endif
> #endif
> diff --git a/drivers/pci/host/pci-host-common.c b/drivers/pci/host/pci-host-common.c
> index 8cba7ab..c0ff4b1 100644
> --- a/drivers/pci/host/pci-host-common.c
> +++ b/drivers/pci/host/pci-host-common.c
> @@ -164,6 +164,19 @@ int pci_host_common_probe(struct platform_device *pdev,
> }
>
> pci_bus_add_devices(bus);
> + platform_set_drvdata(pdev, bus);
> + return 0;
> +}
> +
> +int pci_host_common_remove(struct platform_device *pdev)
> +{
> + struct pci_bus *bus = platform_get_drvdata(pdev);
> +
> + pci_lock_rescan_remove();
> + pci_stop_root_bus(bus);
> + pci_remove_root_bus(bus);
> + pci_unlock_rescan_remove();
A couple of comments/questions about this:
- The probe path seems to have some stateful operations outside of PCI
resources. For example, kzalloc'ing the bus_range resource in
of_pci_get_host_bridge_resources. Do we need to clean these up
explicitly?
- Similarly, we don't seem to tear-down the config space mappings and
data structures for that, so we leak VA space afaict.
Will
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