[PATCH V2 3/5] perf/x86/intel/uncore: Rename uncore_notifier to uncore_pci_sub_notifier

kan.liang
2021-03-17T18:06:34Z

From: Kan Liang <kan.liang@linux.intel.com>

Perf will use a similar method to the PCI sub driver to register
the PMUs for the PCI type of uncore blocks. The method requires a BUS
notifier to support hotplug. The current BUS notifier cannot be reused,
because it searches a const id_table for the corresponding registered
PMU. The PCI type of uncore blocks in the discovery tables doesn't
provide an id_table.

Factor out uncore_bus_notify() and add the pointer of an id_table as a
parameter. The uncore_bus_notify() will be reused in the following
patch.

The current BUS notifier is only used by the PCI sub driver. Its name is
too generic. Rename it to uncore_pci_sub_notifier, which is specific for
the PCI sub driver.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
arch/x86/events/intel/uncore.c | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index dabc01f..391fa7c 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -1203,7 +1203,8 @@ static void uncore_pci_remove(struct pci_dev *pdev)
}

static int uncore_bus_notify(struct notifier_block *nb,
- unsigned long action, void *data)
+ unsigned long action, void *data,
+ const struct pci_device_id *ids)
{
struct device *dev = data;
struct pci_dev *pdev = to_pci_dev(dev);
@@ -1214,7 +1215,7 @@ static int uncore_bus_notify(struct notifier_block *nb,
if (action != BUS_NOTIFY_DEL_DEVICE)
return NOTIFY_DONE;

- pmu = uncore_pci_find_dev_pmu(pdev, uncore_pci_sub_driver->id_table);
+ pmu = uncore_pci_find_dev_pmu(pdev, ids);
if (!pmu)
return NOTIFY_DONE;

@@ -1226,8 +1227,15 @@ static int uncore_bus_notify(struct notifier_block *nb,
return NOTIFY_OK;
}

-static struct notifier_block uncore_notifier = {
- .notifier_call = uncore_bus_notify,
+static int uncore_pci_sub_bus_notify(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ return uncore_bus_notify(nb, action, data,
+ uncore_pci_sub_driver->id_table);
+}
+
+static struct notifier_block uncore_pci_sub_notifier = {
+ .notifier_call = uncore_pci_sub_bus_notify,
};

static void uncore_pci_sub_driver_init(void)
@@ -1268,7 +1276,7 @@ static void uncore_pci_sub_driver_init(void)
ids++;
}

- if (notify && bus_register_notifier(&pci_bus_type, &uncore_notifier))
+ if (notify && bus_register_notifier(&pci_bus_type, &uncore_pci_sub_notifier))
notify = false;

if (!notify)
@@ -1319,7 +1327,7 @@ static void uncore_pci_exit(void)
if (pcidrv_registered) {
pcidrv_registered = false;
if (uncore_pci_sub_driver)
- bus_unregister_notifier(&pci_bus_type, &uncore_notifier);
+ bus_unregister_notifier(&pci_bus_type, &uncore_pci_sub_notifier);
pci_unregister_driver(uncore_pci_driver);
uncore_types_exit(uncore_pci_uncores);
kfree(uncore_extra_pci_dev);
--
2.7.4