提交 e80e7edc 编写于 作者: G Guilherme G. Piccoli 提交者: Bjorn Helgaas

PCI/MSI: Initialize MSI capability for all architectures

1851617c ("PCI/MSI: Disable MSI at enumeration even if kernel doesn't
support MSI") moved dev->msi_cap and dev->msix_cap initialization from the
pci_init_capabilities() path (used on all architectures) to the
pci_setup_device() path (not used on Open Firmware architectures).

This broke MSI or MSI-X on Open Firmware machines.  4d9aac39
("powerpc/PCI: Disable MSI/MSI-X interrupts at PCI probe time in OF case")
fixed it for PowerPC but not for SPARC.

Set up MSI and MSI-X (initialize msi_cap and msix_cap and disable MSI and
MSI-X) in pci_init_capabilities() so all architectures do it the same way.

This reverts 4d9aac39 since this patch fixes the problem generically
for both PowerPC and SPARC.

[bhelgaas: changelog, make pci_msi_setup_pci_dev() static]
Fixes: 1851617c ("PCI/MSI: Disable MSI at enumeration even if kernel doesn't support MSI")
Signed-off-by: NGuilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
上级 1ec21837
......@@ -187,9 +187,6 @@ struct pci_dev *of_create_pci_dev(struct device_node *node,
pci_device_add(dev, bus);
/* Setup MSI caps & disable MSI/MSI-X interrupts */
pci_msi_setup_pci_dev(dev);
return dev;
}
EXPORT_SYMBOL(of_create_pci_dev);
......
......@@ -1145,7 +1145,7 @@ int pci_cfg_space_size(struct pci_dev *dev)
#define LEGACY_IO_RESOURCE (IORESOURCE_IO | IORESOURCE_PCI_FIXED)
void pci_msi_setup_pci_dev(struct pci_dev *dev)
static void pci_msi_setup_pci_dev(struct pci_dev *dev)
{
/*
* Disable the MSI hardware to avoid screaming interrupts
......@@ -1212,8 +1212,6 @@ int pci_setup_device(struct pci_dev *dev)
/* "Unknown power state" */
dev->current_state = PCI_UNKNOWN;
pci_msi_setup_pci_dev(dev);
/* Early fixups, before probing the BARs */
pci_fixup_device(pci_fixup_early, dev);
/* device class may be changed after fixup */
......@@ -1606,6 +1604,9 @@ static void pci_init_capabilities(struct pci_dev *dev)
/* MSI/MSI-X list */
pci_msi_init_pci_dev(dev);
/* Setup MSI caps & disable MSI/MSI-X interrupts */
pci_msi_setup_pci_dev(dev);
/* Buffers for saving PCIe and PCI-X capabilities */
pci_allocate_cap_save_buffers(dev);
......
......@@ -1248,8 +1248,6 @@ struct msix_entry {
u16 entry; /* driver uses to specify entry, OS writes */
};
void pci_msi_setup_pci_dev(struct pci_dev *dev);
#ifdef CONFIG_PCI_MSI
int pci_msi_vec_count(struct pci_dev *dev);
void pci_msi_shutdown(struct pci_dev *dev);
......
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