[v8,23/24] PCI/portdrv: Declare support of movable BARs

Commit Message

Sergei Miroshnichenko April 27, 2020, 6:23 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 empty hooks
.rescan_prepare() and .rescan_done() to increase chances to allocate new
BARs for new devices.

Signed-off-by: Sergei Miroshnichenko <[e-mail]>
---
 drivers/pci/pcie/portdrv_pci.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

Patch

diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index 160d67c59310..df1faf2fed86 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -205,6 +205,14 @@  static const struct pci_error_handlers pcie_portdrv_err_handler = {
 	.resume = pcie_portdrv_err_resume,
 };
 
+static void pcie_portdrv_rescan_prepare(struct pci_dev *pdev)
+{
+}
+
+static void pcie_portdrv_rescan_done(struct pci_dev *pdev)
+{
+}
+
 static struct pci_driver pcie_portdriver = {
 	.name		= "pcieport",
 	.id_table	= &port_pci_ids[0],
@@ -215,6 +223,9 @@  static struct pci_driver pcie_portdriver = {
 
 	.err_handler	= &pcie_portdrv_err_handler,
 
+	.rescan_prepare	= pcie_portdrv_rescan_prepare,
+	.rescan_done	= pcie_portdrv_rescan_done,
+
 	.driver.pm	= PCIE_PORTDRV_PM_OPS,
 };