[RFC PATCH 4/5] PCI: Export pci_reset_supported()

[Alex Williamson <alex.williamson@nvidia.com>]

The success or failure of pci_reset_function() is conditional on the
state of the device, ex. VFs enabled on an SR-IOV PF.  Therefore a
driver can no longer infer through executing pci_reset_function()
whether a device has supported reset methods.  The reset_methods
array indicates whether the device has any available reset mechanisms
and is not gated on dynamic blockers, like SR-IOV enablement.

Export pci_reset_supported() for drivers to use for an instant
snapshot of reset support.

Assisted-by: Claude:claude-opus-4-8
Signed-off-by: Alex Williamson <alex.williamson@nvidia.com>
---
 drivers/pci/pci.c   | 1 +
 drivers/pci/pci.h   | 1 -
 include/linux/pci.h | 1 +
 3 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 06728137c407..0b4f13397da2 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -98,6 +98,7 @@ bool pci_reset_supported(struct pci_dev *dev)
 {
 	return dev->reset_methods[0] != 0;
 }
+EXPORT_SYMBOL_GPL(pci_reset_supported);
 
 #ifdef CONFIG_PCI_DOMAINS
 int pci_domains_supported = 1;
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 4469e1a77f3c..416fd6b74abe 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -230,7 +230,6 @@ enum pci_mmap_api {
 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
 		  enum pci_mmap_api mmap_api);
 
-bool pci_reset_supported(struct pci_dev *dev);
 void pci_init_reset_methods(struct pci_dev *dev);
 int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
 int pci_bus_error_reset(struct pci_dev *dev);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index ab41a49f4eb7..4de21e6ac538 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1474,6 +1474,7 @@ void pcie_print_link_status(struct pci_dev *dev);
 int pcie_reset_flr(struct pci_dev *dev, bool probe);
 int pcie_flr(struct pci_dev *dev);
 int __pci_reset_function_locked(struct pci_dev *dev);
+bool pci_reset_supported(struct pci_dev *dev);
 int pci_reset_function(struct pci_dev *dev);
 int pci_reset_function_locked(struct pci_dev *dev);
 int pci_try_reset_function(struct pci_dev *dev);
-- 
2.53.0