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(parent: 6b2f135) | patch
PCI/IOV: Skip INTx config reads for VFs
authorKarimAllah Ahmed <karahmed@amazon.de>
Wed, 17 Jan 2018 18:30:29 +0000 (19:30 +0100)
committerBjorn Helgaas <helgaas@kernel.org>
Mon, 5 Mar 2018 14:10:14 +0000 (08:10 -0600)
commitbe20f6b063f51cd77d071b803ee24f23200dc559
tree247d8cd73adbdaeabc2c4952429833ffbd534f6dtree | snapshot
parent6b2f1351af567110cec80d7c067314c633a14f50commit | diff
PCI/IOV: Skip INTx config reads for VFs

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>
drivers/pci/probe.c diff | blob | history
Domain: System / Kernel;