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PCI: Export pci_dev_trylock() and pci_dev_unlock()

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Other places in the kernel use this form, and so just
provide a common path for it.

Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Link: https://lore.kernel.org/r/20210623022824.308041-2-mcgrof@kernel.org
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Luis Chamberlain 2021-06-22 19:28:23 -07:00 committed by Alex Williamson
parent 0af5160edb
commit e3a9b1212b
2 changed files with 7 additions and 2 deletions
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6
drivers/pci/pci.c
View File

@ -5028,7 +5028,7 @@ static void pci_dev_lock(struct pci_dev *dev)
} }
/* Return 1 on successful lock, 0 on contention */ /* Return 1 on successful lock, 0 on contention */
static int pci_dev_trylock(struct pci_dev *dev) int pci_dev_trylock(struct pci_dev *dev)
{ {
if (pci_cfg_access_trylock(dev)) { if (pci_cfg_access_trylock(dev)) {
if (device_trylock(&dev->dev)) if (device_trylock(&dev->dev))
@ -5038,12 +5038,14 @@ static int pci_dev_trylock(struct pci_dev *dev)
return 0; return 0;
} }
EXPORT_SYMBOL_GPL(pci_dev_trylock);
static void pci_dev_unlock(struct pci_dev *dev) void pci_dev_unlock(struct pci_dev *dev)
{ {
device_unlock(&dev->dev); device_unlock(&dev->dev);
pci_cfg_access_unlock(dev); pci_cfg_access_unlock(dev);
} }
EXPORT_SYMBOL_GPL(pci_dev_unlock);
static void pci_dev_save_and_disable(struct pci_dev *dev) static void pci_dev_save_and_disable(struct pci_dev *dev)
{ {

3
include/linux/pci.h
View File

@ -1621,6 +1621,9 @@ void pci_cfg_access_lock(struct pci_dev *dev);
bool pci_cfg_access_trylock(struct pci_dev *dev); bool pci_cfg_access_trylock(struct pci_dev *dev);
void pci_cfg_access_unlock(struct pci_dev *dev); void pci_cfg_access_unlock(struct pci_dev *dev);
int pci_dev_trylock(struct pci_dev *dev);
void pci_dev_unlock(struct pci_dev *dev);
/* /*
* PCI domain support. Sometimes called PCI segment (eg by ACPI), * PCI domain support. Sometimes called PCI segment (eg by ACPI),
* a PCI domain is defined to be a set of PCI buses which share * a PCI domain is defined to be a set of PCI buses which share