tree 731237d3f796f92aa31b41a8fda7f0e38c707fbb
parent 7b92b4f61ec49cb1a5813298f35258bd7ecd3667
author Alexander Gordeev <agordeev@redhat.com> 1388388495 +0100
committer Bjorn Helgaas <bhelgaas@google.com> 1388794675 -0700

PCI/MSI: Add pci_msix_vec_count()

This creates an MSI-X counterpart for pci_msi_vec_count().  Device drivers
can use this function to obtain maximum number of MSI-X interrupts the
device supports and use that number in a subsequent call to
pci_enable_msix().

pci_msix_vec_count() supersedes pci_msix_table_size() and returns a
negative errno if device does not support MSI-X interrupts.  After this
update, callers must always check the returned value.

The only user of pci_msix_table_size() was the PCI-Express port driver,
which is also updated by this change.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Tejun Heo <tj@kernel.org>