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pci-v5.13-fixes-1 

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Merge tag 'pci-v5.13-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

 - Fix MSIs for platforms with "msi-map" device-tree property, which we
   broke in v5.13-rc1 (Jean-Philippe Brucker)

 - Add Krzysztof Wilczyński as PCI reviewer (Lorenzo Pieralisi)

* tag 'pci-v5.13-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI/MSI: Fix MSIs for generic hosts that use device-tree's "msi-map"
  MAINTAINERS: Add Krzysztof as PCI host/endpoint controllers reviewer
This commit is contained in:
Linus Torvalds 2021-06-04 15:19:45 -07:00
parent 16f0596fc1 85aabbd7b3
commit ff6091075a
4 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
MAINTAINERS
View File

@ -14119,6 +14119,7 @@ F: drivers/pci/controller/pci-v3-semi.c
PCI ENDPOINT SUBSYSTEM
M: Kishon Vijay Abraham I <kishon@ti.com>
M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
R: Krzysztof Wilczyński <kw@linux.com>
L: linux-pci@vger.kernel.org
S: Supported
F: Documentation/PCI/endpoint/*
@ -14167,6 +14168,7 @@ F: drivers/pci/controller/pci-xgene-msi.c
PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS
M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
R: Rob Herring <robh@kernel.org>
R: Krzysztof Wilczyński <kw@linux.com>
L: linux-pci@vger.kernel.org
S: Supported
Q: http://patchwork.ozlabs.org/project/linux-pci/list/

7
drivers/pci/of.c
View File

@ -103,6 +103,13 @@ struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus)
#endif
}
bool pci_host_of_has_msi_map(struct device *dev)
{
if (dev && dev->of_node)
return of_get_property(dev->of_node, "msi-map", NULL);
return false;
}
static inline int __of_pci_pci_compare(struct device_node *node,
unsigned int data)
{

3
drivers/pci/probe.c
View File

@ -925,7 +925,8 @@ static int pci_register_host_bridge(struct pci_host_bridge *bridge)
device_enable_async_suspend(bus->bridge);
pci_set_bus_of_node(bus);
pci_set_bus_msi_domain(bus);
if (bridge->msi_domain && !dev_get_msi_domain(&bus->dev))
if (bridge->msi_domain && !dev_get_msi_domain(&bus->dev) &&
!pci_host_of_has_msi_map(parent))
bus->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
if (!parent)

2
include/linux/pci.h
View File

@ -2344,6 +2344,7 @@ int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
struct device_node;
struct irq_domain;
struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
bool pci_host_of_has_msi_map(struct device *dev);
/* Arch may override this (weak) */
struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
@ -2351,6 +2352,7 @@ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
#else /* CONFIG_OF */
static inline struct irq_domain *
pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
static inline bool pci_host_of_has_msi_map(struct device *dev) { return false; }
#endif /* CONFIG_OF */
static inline struct device_node *