diff options
| author |   Lukas Wunner <lukas@wunner.de> | 2018-07-19 17:27:57 -0500 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2018-07-31 11:09:36 -0500 |
| commit | 4417aa45c185376ece278430e33b6a1891a1dc36 (patch) | |
| tree | 0e498444068e5ba5e4d8a280d972faabd2ff1e22 /drivers/pci/hotplug/pciehp_core.c | |
| parent | PCI: pciehp: Resume to D0 on enable/disable (diff) | |
| download | linux-dev-4417aa45c185376ece278430e33b6a1891a1dc36.tar.xz linux-dev-4417aa45c185376ece278430e33b6a1891a1dc36.zip | |
PCI: pciehp: Resume parent to D0 on config space access
Ensure accessibility of a hotplug port's config space when accessed via
sysfs by resuming its parent to D0.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Diffstat (limited to 'drivers/pci/hotplug/pciehp_core.c')
| -rw-r--r-- | drivers/pci/hotplug/pciehp_core.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index 3e73b12ed656..01fcf1fa0f66 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -26,6 +26,8 @@ #include <linux/interrupt.h> #include <linux/time.h> +#include "../pci.h" + /* Global variables */ bool pciehp_debug; bool pciehp_poll_mode; @@ -126,8 +128,11 @@ static void cleanup_slot(struct controller *ctrl) static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) { struct slot *slot = hotplug_slot->private; + struct pci_dev *pdev = slot->ctrl->pcie->port; + pci_config_pm_runtime_get(pdev); pciehp_set_attention_status(slot, status); + pci_config_pm_runtime_put(pdev); return 0; } @@ -150,8 +155,11 @@ static int disable_slot(struct hotplug_slot *hotplug_slot) static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = hotplug_slot->private; + struct pci_dev *pdev = slot->ctrl->pcie->port; + pci_config_pm_runtime_get(pdev); pciehp_get_power_status(slot, value); + pci_config_pm_runtime_put(pdev); return 0; } @@ -166,16 +174,22 @@ static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = hotplug_slot->private; + struct pci_dev *pdev = slot->ctrl->pcie->port; + pci_config_pm_runtime_get(pdev); pciehp_get_latch_status(slot, value); + pci_config_pm_runtime_put(pdev); return 0; } static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = hotplug_slot->private; + struct pci_dev *pdev = slot->ctrl->pcie->port; + pci_config_pm_runtime_get(pdev); pciehp_get_adapter_status(slot, value); + pci_config_pm_runtime_put(pdev); return 0; } |