Use pci_lock_hotplug()/pci_unlock_hotplug() to serialize hotplug operations
triggered by PCI hotplug sysfs interfaces.
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
---
drivers/pci/hotplug/pci_hotplug_core.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/hotplug/pci_hotplug_core.c b/drivers/pci/hotplug/pci_hotplug_core.c
index 202f4a9..633fe3a 100644
--- a/drivers/pci/hotplug/pci_hotplug_core.c
+++ b/drivers/pci/hotplug/pci_hotplug_core.c
@@ -121,6 +121,7 @@ static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf,
retval = -ENODEV;
goto exit;
}
+ pci_lock_hotplug();
switch (power) {
case 0:
if (slot->ops->disable_slot)
@@ -136,6 +137,7 @@ static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf,
err ("Illegal value specified for power\n");
retval = -EINVAL;
}
+ pci_unlock_hotplug();
module_put(slot->ops->owner);
exit:
--
1.7.5.4
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