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| author | Sinan Kaya <okaya@codeaurora.org> | 2018-02-27 14:14:08 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <helgaas@kernel.org> | 2018-02-27 14:14:08 -0600 |
| commit | cb5e0d060fb1f3136e96acecbd4001a7f0cbac94 (patch) | |
| tree | 46f762dc4bac69a0ebe122a142780cb38a43cfa1 | |
| parent | 832e4e1f76b8a84991e9db56fdcef1ebce839b8b (diff) | |
| download | linux-stable-cb5e0d060fb1f3136e96acecbd4001a7f0cbac94.tar.gz linux-stable-cb5e0d060fb1f3136e96acecbd4001a7f0cbac94.tar.bz2 linux-stable-cb5e0d060fb1f3136e96acecbd4001a7f0cbac94.zip | |
PCI: Protect restore with device lock to be consistent
Commit b014e96d1abb ("PCI: Protect pci_error_handlers->reset_notify() usage
with device_lock()") added protection around pci_dev_restore() function so
a device-specific remove callback does not cause a race condition with
hotplug.
pci_dev_lock() usage has been forgotten in two places. Add locks for
pci_slot_restore() and moving pci_dev_restore() inside the locks for
pci_try_reset_function().
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | drivers/pci/pci.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 4db740e4f50a..660c848aa14a 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -4517,9 +4517,9 @@ int pci_try_reset_function(struct pci_dev *dev) pci_dev_save_and_disable(dev); rc = __pci_reset_function_locked(dev); + pci_dev_restore(dev); pci_dev_unlock(dev); - pci_dev_restore(dev); return rc; } EXPORT_SYMBOL_GPL(pci_try_reset_function); @@ -4727,7 +4727,9 @@ static void pci_slot_restore(struct pci_slot *slot) list_for_each_entry(dev, &slot->bus->devices, bus_list) { if (!dev->slot || dev->slot != slot) continue; + pci_dev_lock(dev); pci_dev_restore(dev); + pci_dev_unlock(dev); if (dev->subordinate) pci_bus_restore(dev->subordinate); } |