[PATCH RFC v4 09/21] PCI: Mark immovable BARs with PCI_FIXED
From: Sergey Miroshnichenko <hidden>
Date: 2019-03-11 13:49:33
Also in:
linux-pci
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
If a PCIe device driver doesn't yet have support for movable BARs, mark device's BARs with IORESOURCE_PCI_FIXED. Signed-off-by: Sergey Miroshnichenko <redacted> --- drivers/pci/probe.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index dc935f82a595..1cf6ec960236 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c@@ -3262,6 +3262,21 @@ static void pci_bus_rescan_prepare(struct pci_bus *bus) } else if (dev->driver && dev->driver->rescan_prepare) { dev->driver->rescan_prepare(dev); + } else if (dev->driver || ((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA)) { + int i; + + for (i = 0; i < PCI_NUM_RESOURCES; i++) { + struct resource *r = &dev->resource[i]; + + if (!r->flags || !r->parent || + (r->flags & IORESOURCE_UNSET) || + (r->flags & IORESOURCE_PCI_FIXED)) + continue; + + r->flags |= IORESOURCE_PCI_FIXED; + pci_warn(dev, "%s: no support for movable BARs, mark BAR %d (%pR) as fixed\n", + __func__, i, r); + } } } }
--
2.20.1