On Thu, 2013-07-11 at 17:43 +0800, Yijing Wang wrote:
> Currently, pciehp_resume() try to hot add device if the slot adapter
> status return true. But if there are already some devices exist,
> namely list_empty(bus->devices) return false. We should not add the device
> again, because the device add action will fail. Also print some uncomfortable
> messages like this:
> pciehp 0000:00:1c.1:pcie04: Device 0000:03:00.0 already exists at 0000:03:00, cannot hot-add
> pciehp 0000:00:1c.1:pcie04: Cannot add device at 0000:03:00
>
> Signed-off-by: Yijing Wang <wangyijing@xxxxxxxxxx>
> Cc: Paul Bolle <pebolle@xxxxxxxxxx>
> Cc: "Rafael J. Wysocki" <rjw@xxxxxxx>
> Cc: Oliver Neukum <oneukum@xxxxxxx>
> Cc: Gu Zheng <guz.fnst@xxxxxxxxxxxxxx>
> Cc: linux-pci@xxxxxxxxxxxxxxx
> ---
> drivers/pci/hotplug/pciehp_core.c | 9 ++++++---
> 1 files changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
> index 7d72c5e..1542735 100644
> --- a/drivers/pci/hotplug/pciehp_core.c
> +++ b/drivers/pci/hotplug/pciehp_core.c
[...]
> @@ -311,10 +312,12 @@ static int pciehp_resume (struct pcie_device *dev)
>
> /* Check if slot is occupied */
> pciehp_get_adapter_status(slot, &status);
> - if (status)
> - pciehp_enable_slot(slot);
> - else
> + if (status) {
> + if (list_empty(&pbus->devices))
> + pciehp_enable_slot(slot);
> + } else if (!list_empty(&pbus->devices))
> pciehp_disable_slot(slot);
> +
Coding style: braces for the "else if" branch too? Or change the first
test to "if (status && list_empty([...]))" and drop the braces?
> return 0;
> }
> #endif /* PM */
Paul Bolle
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