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| author | Alexander Gordeev <agordeev@redhat.com> | 2013-12-30 08:28:15 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-01-03 17:17:55 -0700 |
| commit | ff1aa430a2fa43189e89c7ddd559f0bee2298288 (patch) | |
| tree | 731237d3f796f92aa31b41a8fda7f0e38c707fbb /drivers/pci/pcie | |
| parent | 7b92b4f61ec49cb1a5813298f35258bd7ecd3667 (diff) | |
| download | linux-ff1aa430a2fa43189e89c7ddd559f0bee2298288.tar.bz2 | |
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>
Diffstat (limited to 'drivers/pci/pcie')
| -rw-r--r-- | drivers/pci/pcie/portdrv_core.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 0b6e76604068..4ab719826dd7 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -79,9 +79,10 @@ static int pcie_port_enable_msix(struct pci_dev *dev, int *vectors, int mask) u16 reg16; u32 reg32; - nr_entries = pci_msix_table_size(dev); - if (!nr_entries) - return -EINVAL; + nr_entries = pci_msix_vec_count(dev); + if (nr_entries < 0) + return nr_entries; + BUG_ON(!nr_entries); if (nr_entries > PCIE_PORT_MAX_MSIX_ENTRIES) nr_entries = PCIE_PORT_MAX_MSIX_ENTRIES; |