tree 6595952359cfac3ef0ae83c6f5caa97700b2b22a
parent 3ad674d6c6c5724c83f10f422d826420c83536cd
author Yijing Wang <wangyijing@huawei.com> 1381409891 +0800
committer Bjorn Helgaas <bhelgaas@google.com> 1383075052 -0600

PCI: Fail MSI/MSI-X initialization if device is not in PCI_D0

Currently, pci_enable_msi() and pci_enable_msix() return success even if
the device power state is not D0.  However, we don't write the MSI message
to the device registers, and the registers will never be updated later.

This patch makes pci_enable_msi() and pci_enable_msix() return an error
instead.

[bhelgaas: changelog]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>