Provide an interface to get to hotplug controller reset_slot callback
Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
---
drivers/pci/hotplug/pci_hotplug_core.c | 24 ++++++++++++++++++++++++
include/linux/pci_hotplug.h | 8 ++++++++
2 files changed, 32 insertions(+)
diff --git a/drivers/pci/hotplug/pci_hotplug_core.c b/drivers/pci/hotplug/pci_hotplug_core.c
index 202f4a9..1d0fee4 100644
--- a/drivers/pci/hotplug/pci_hotplug_core.c
+++ b/drivers/pci/hotplug/pci_hotplug_core.c
@@ -537,6 +537,29 @@ int __must_check pci_hp_change_slot_info(struct hotplug_slot *hotplug,
return 0;
}
+/**
+ * pci_hp_reset_slot - reset slot
+ *
+ * @hotplug: pointer to hotplug slot to reset
+ * @probe: reset slot (0) or just probe
+ *
+ * Returns 0 if successful, anything else for an error.
+ */
+int pci_hp_reset_slot(struct hotplug_slot *hotplug, int probe)
+{
+ int result = -ENOTTY;
+
+ if (!hotplug || !try_module_get(hotplug->ops->owner))
+ return result;
+
+ if (hotplug->ops->reset_slot)
+ result = hotplug->ops->reset_slot(hotplug, probe);
+
+ module_put(hotplug->ops->owner);
+
+ return result;
+}
+
static int __init pci_hotplug_init (void)
{
int result;
@@ -570,3 +593,4 @@ MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
EXPORT_SYMBOL_GPL(__pci_hp_register);
EXPORT_SYMBOL_GPL(pci_hp_deregister);
EXPORT_SYMBOL_GPL(pci_hp_change_slot_info);
+EXPORT_SYMBOL_GPL(pci_hp_reset_slot);
diff --git a/include/linux/pci_hotplug.h b/include/linux/pci_hotplug.h
index 0d3a604..d771cee 100644
--- a/include/linux/pci_hotplug.h
+++ b/include/linux/pci_hotplug.h
@@ -135,6 +135,14 @@ extern int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *pbus,
extern int pci_hp_deregister(struct hotplug_slot *slot);
extern int __must_check pci_hp_change_slot_info (struct hotplug_slot *slot,
struct hotplug_slot_info *info);
+#ifdef CONFIG_HOTPLUG_PCI
+int pci_hp_reset_slot(struct hotplug_slot *slot, int probe);
+#else
+static inline int pci_hp_reset_slot(struct hotplug_slot *slot, int probe)
+{
+ return -ENOTTY;
+}
+#endif
/* use a define to avoid include chaining to get THIS_MODULE & friends */
#define pci_hp_register(slot, pbus, devnr, name) \
--
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