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powerpc/PCI: Disable MSI/MSI-X interrupts at PCI probe time in OF case

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Since commit 1851617cd2 ("PCI/MSI: Disable MSI at enumeration even if
kernel doesn't support MSI"), the setup of dev->msi_cap/msix_cap and the
disable of MSI/MSI-X interrupts isn't being done at PCI probe time, as
the logic responsible for this was moved in the aforementioned commit
from pci_device_add() to pci_setup_device(). The latter function is not
reachable on PowerPC pseries platform during Open Firmware PCI probing
time.

This exhibits as drivers not being able to enable MSI, eg:

  bnx2x 0000:01:00.0: no msix capability found

This patch calls pci_msi_setup_pci_dev() explicitly to disable MSI/MSI-X
during PCI probe time on pSeries platform.

Fixes: 1851617cd2 ("PCI/MSI: Disable MSI at enumeration even if kernel doesn't support MSI")
[mpe: Flesh out change log and clarify comment]
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Guilherme G. Piccoli 2015-08-24 22:42:47 +10:00 committed by Michael Ellerman
parent 22b6839b91
commit 4d9aac397a
1 changed files with 3 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
arch/powerpc/kernel/pci_of_scan.c
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@ -191,6 +191,9 @@ struct pci_dev *of_create_pci_dev(struct device_node *node,
pci_device_add(dev, bus); pci_device_add(dev, bus);
/* Setup MSI caps & disable MSI/MSI-X interrupts */
pci_msi_setup_pci_dev(dev);
return dev; return dev;
} }
EXPORT_SYMBOL(of_create_pci_dev); EXPORT_SYMBOL(of_create_pci_dev);