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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-04 15:19:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-04 15:19:45 -0700 |
| commit | ff6091075a687676d76b3beb24fa77389b387b00 (patch) | |
| tree | b98e19ed4d6527bd648d1367e57e5169a17df96c | |
| parent | 16f0596fc1d78a1f3ae4628cff962bb297dc908c (diff) | |
| parent | 85aabbd7b315c65673084b6227bee92c00405239 (diff) | |
| download | linux-stable-ff6091075a687676d76b3beb24fa77389b387b00.tar.gz linux-stable-ff6091075a687676d76b3beb24fa77389b387b00.tar.bz2 linux-stable-ff6091075a687676d76b3beb24fa77389b387b00.zip | |
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
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | drivers/pci/of.c | 7 | ||||
| -rw-r--r-- | drivers/pci/probe.c | 3 | ||||
| -rw-r--r-- | include/linux/pci.h | 2 |
4 files changed, 13 insertions, 1 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 948706174fae..32d31301049c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -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/ diff --git a/drivers/pci/of.c b/drivers/pci/of.c index da5b414d585a..85dcb7097da4 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -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) { diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 3a62d09b8869..275204646c68 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -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) diff --git a/include/linux/pci.h b/include/linux/pci.h index c20211e59a57..24306504226a 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -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 * |