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pci-v4.15-fixes-1

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Merge tag 'pci-v4.15-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

 - add a pci_get_domain_bus_and_slot() stub for the CONFIG_PCI=n case to
   avoid build breakage in the v4.16 merge window if a
   pci_get_bus_and_slot() -> pci_get_domain_bus_and_slot() patch gets
   merged before the PCI tree (Randy Dunlap)

 - fix an AMD boot regression in the 64bit BAR support added in v4.15
   (Christian König)

 - fix an R-Car use-after-free that causes a crash if no PCIe card is
   present (Geert Uytterhoeven)

* tag 'pci-v4.15-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: rcar: Fix use-after-free in probe error path
  x86/PCI: Only enable a 64bit BAR on single-socket AMD Family 15h
  x86/PCI: Fix infinite loop in search for 64bit BAR placement
  PCI: Add pci_get_domain_bus_and_slot() stub
This commit is contained in:
Linus Torvalds 2017-12-14 17:02:39 -08:00
commit c4f988ee51
3 changed files with 28 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

27
arch/x86/pci/fixup.c
View file

@ -665,6 +665,16 @@ static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
unsigned i;
u32 base, limit, high;
struct resource *res, *conflict;
struct pci_dev *other;
/* Check that we are the only device of that type */
other = pci_get_device(dev->vendor, dev->device, NULL);
if (other != dev ||
(other = pci_get_device(dev->vendor, dev->device, other))) {
/* This is a multi-socket system, don't touch it for now */
pci_dev_put(other);
return;
}
for (i = 0; i < 8; i++) {
pci_read_config_dword(dev, AMD_141b_MMIO_BASE(i), &base);
@ -696,8 +706,13 @@ static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
res->end = 0xfd00000000ull - 1;
/* Just grab the free area behind system memory for this */
while ((conflict = request_resource_conflict(&iomem_resource, res)))
while ((conflict = request_resource_conflict(&iomem_resource, res))) {
if (conflict->end >= res->end) {
kfree(res);
return;
}
res->start = conflict->end + 1;
}
dev_info(&dev->dev, "adding root bus resource %pR\n", res);
@ -714,10 +729,10 @@ static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
pci_bus_add_resource(dev->bus, res, 0);
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar);
#endif

8
drivers/pci/host/pcie-rcar.c
View file

@ -1128,12 +1128,12 @@ static int rcar_pcie_probe(struct platform_device *pdev)
err = rcar_pcie_get_resources(pcie);
if (err < 0) {
dev_err(dev, "failed to request resources: %d\n", err);
goto err_free_bridge;
goto err_free_resource_list;
}
err = rcar_pcie_parse_map_dma_ranges(pcie, dev->of_node);
if (err)
goto err_free_bridge;
goto err_free_resource_list;
pm_runtime_enable(dev);
err = pm_runtime_get_sync(dev);
@ -1176,9 +1176,9 @@ err_pm_put:
err_pm_disable:
pm_runtime_disable(dev);
err_free_bridge:
pci_free_host_bridge(bridge);
err_free_resource_list:
pci_free_resource_list(&pcie->resources);
pci_free_host_bridge(bridge);
return err;
}

3
include/linux/pci.h
View file

@ -1674,6 +1674,9 @@ static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
unsigned int devfn)
{ return NULL; }
static inline struct pci_dev *pci_get_domain_bus_and_slot(int domain,
unsigned int bus, unsigned int devfn)
{ return NULL; }
static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }