diff options
| author | Niklas Schnelle <schnelle@linux.ibm.com> | 2021-05-05 14:00:06 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2021-11-08 14:17:49 +0100 |
| commit | dfd5bb23ad75bdabde89ac3166705a450bf16acb (patch) | |
| tree | 66180bd375171b92fa2099965447896524e5388e | |
| parent | s390/pci: implement reset_slot for hotplug slot (diff) | |
| download | linux-dfd5bb23ad75bdabde89ac3166705a450bf16acb.tar.xz linux-dfd5bb23ad75bdabde89ac3166705a450bf16acb.zip | |
PCI: Export pci_dev_lock()
Commit e3a9b1212b9d ("PCI: Export pci_dev_trylock() and pci_dev_unlock()")
already exported pci_dev_trylock()/pci_dev_unlock() however in some
circumstances such as during error recovery it makes sense to block
waiting to get full access to the device so also export pci_dev_lock().
Link: https://lore.kernel.org/all/20210928181014.GA713179@bhelgaas/
Acked-by: Pierre Morel <pmorel@linux.ibm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
| -rw-r--r-- | drivers/pci/pci.c | 3 | ||||
| -rw-r--r-- | include/linux/pci.h | 1 |
2 files changed, 3 insertions, 1 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index da75c422ba85..193bfcda9c26 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -5074,12 +5074,13 @@ static int pci_reset_bus_function(struct pci_dev *dev, bool probe) return pci_parent_bus_reset(dev, probe); } -static void pci_dev_lock(struct pci_dev *dev) +void pci_dev_lock(struct pci_dev *dev) { pci_cfg_access_lock(dev); /* block PM suspend, driver probe, etc. */ device_lock(&dev->dev); } +EXPORT_SYMBOL_GPL(pci_dev_lock); /* Return 1 on successful lock, 0 on contention */ int pci_dev_trylock(struct pci_dev *dev) diff --git a/include/linux/pci.h b/include/linux/pci.h index b4dbcc86b3f1..d307b071b65e 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1664,6 +1664,7 @@ void pci_cfg_access_lock(struct pci_dev *dev); bool pci_cfg_access_trylock(struct pci_dev *dev); void pci_cfg_access_unlock(struct pci_dev *dev); +void pci_dev_lock(struct pci_dev *dev); int pci_dev_trylock(struct pci_dev *dev); void pci_dev_unlock(struct pci_dev *dev); |