[PATCH 12/36] PCI: Separate realloc list checking after allocation

Yinghai Lu
2015-07-06T23:48:19Z

We check the realloc list, as list must be empty after allocation.

Separate the realloc list checking to another function.

Add checking that is missed in acpiphp driver.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Len Brown <lenb@kernel.org>
Cc: linux-acpi@vger.kernel.org
---
drivers/pci/hotplug/acpiphp_glue.c | 1 +
drivers/pci/pci.h | 1 +
drivers/pci/setup-bus.c | 11 ++++++++---
3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index ff53856..134caee 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -507,6 +507,7 @@ static void enable_slot(struct acpiphp_slot *slot)
}
}
__pci_bus_assign_resources(bus, &add_list, NULL);
+ __pci_bus_check_realloc(&add_list);

acpiphp_sanitize_bus(bus);
pcie_bus_configure_settings(bus);
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 4ff0ff1..2b83977 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -235,6 +235,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus,
void __pci_bus_assign_resources(const struct pci_bus *bus,
struct list_head *realloc_head,
struct list_head *fail_head);
+void __pci_bus_check_realloc(struct list_head *realloc_head);
bool pci_bus_clip_resource(struct pci_dev *dev, int idx);

void pci_reassigndev_resource_alignment(struct pci_dev *dev);
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 51085a8..ed5f632 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -345,6 +345,11 @@ out:
}
}

+void __pci_bus_check_realloc(struct list_head *realloc_head)
+{
+ BUG_ON(!list_empty(realloc_head));
+}
+
/**
* assign_requested_resources_sorted() - satisfy resource requests
*
@@ -1856,7 +1861,7 @@ again:
/* Depth last, allocate resources and update the hardware. */
__pci_bus_assign_resources(bus, add_list, &fail_head);
if (add_list)
- BUG_ON(!list_empty(add_list));
+ __pci_bus_check_realloc(add_list);
tried_times++;

/* any device complain? */
@@ -1931,7 +1936,7 @@ void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge)
again:
__pci_bus_size_bridges(parent, &add_list);
__pci_bridge_assign_resources(bridge, &add_list, &fail_head);
- BUG_ON(!list_empty(&add_list));
+ __pci_bus_check_realloc(&add_list);
tried_times++;

if (list_empty(&fail_head))
@@ -1990,6 +1995,6 @@ void pci_assign_unassigned_bus_resources(struct pci_bus *bus)
&add_list);
up_read(&pci_bus_sem);
__pci_bus_assign_resources(bus, &add_list, NULL);
- BUG_ON(!list_empty(&add_list));
+ __pci_bus_check_realloc(&add_list);
}
EXPORT_SYMBOL_GPL(pci_assign_unassigned_bus_resources);
--
1.8.4.5