[v9,23/26] PCI/portdrv: Declare support of movable BARs

Commit Message

Sergei Miroshnichenko Dec. 18, 2020, 5:40 p.m. UTC

Currently there are no reliable way to determine if a driver uses BARs of
its devices (their struct resource don't always have a child), so if it
doesn't explicitly support movable BARs, they are considered fixed.

The portdrv driver for PCI switches don't use BARs, so add a new hook
.bar_fixed() { return false; } to increase the chances to allocate new
BARs for new devices.

Signed-off-by: Sergei Miroshnichenko <[e-mail]>
---
 drivers/pci/pcie/portdrv_pci.c | 7 +++++++
 1 file changed, 7 insertions(+)

Patch

diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index 0b250bc5f405..3043f7e4d3c1 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -212,6 +212,11 @@  static const struct pci_error_handlers pcie_portdrv_err_handler = {
 	.resume = pcie_portdrv_err_resume,
 };
 
+static bool pcie_portdrv_bar_fixed(struct pci_dev *pdev, int resno)
+{
+	return false;
+}
+
 static struct pci_driver pcie_portdriver = {
 	.name		= "pcieport",
 	.id_table	= &port_pci_ids[0],
@@ -222,6 +227,8 @@  static struct pci_driver pcie_portdriver = {
 
 	.err_handler	= &pcie_portdrv_err_handler,
 
+	.bar_fixed	= pcie_portdrv_bar_fixed,
+
 	.driver.pm	= PCIE_PORTDRV_PM_OPS,
 };