PCI/IOV: Skip INTx config reads for VFs

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Per PCIe r4.0, sec 9.2.1.4, VFs can not implement INTX, and their Interrupt
Line and Interrupt Pin registers must be RO Zero.  Some devices have
thousands of VFs, so skip reading the registers as an optimization.

Signed-off-by: KarimAllah Ahmed <karahmed@amazon.de>
Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de>
[bhelgaas: changelog, comment]
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>

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KarimAllah Ahmed 2018-01-17 19:30:29 +01:00 • committed by Bjorn Helgaas

parent 6b2f1351af

commit be20f6b063

1 changed files with 7 additions and 0 deletions

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drivers/pci/probe.c

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