diff options
| author | Alexander Gordeev <agordeev@redhat.com> | 2013-12-30 08:28:15 +0100 |
|---|---|---|
| committer | Richard Zhu <Richard.Zhu@freescale.com> | 2014-11-07 12:55:57 +0800 |
| commit | 514617755ef5a179d001f9a233b934c3ff7339cb (patch) | |
| tree | 470c590d9acbde345ec2904c1ca0f83bdf4e6744 /include | |
| parent | 9464a0444d135beb152b638334c8d23f9b2626d2 (diff) | |
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>
(cherry picked from commit ff1aa430a2fa43189e89c7ddd559f0bee2298288)
(cherry picked from commit 033f2e78584cdd322c3a06cdf1a5641ca2f0ae3d)
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pci.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index f142480d9dc5..ba435a185355 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1135,9 +1135,9 @@ static inline void pci_msi_shutdown(struct pci_dev *dev) static inline void pci_disable_msi(struct pci_dev *dev) { } -static inline int pci_msix_table_size(struct pci_dev *dev) +static inline int pci_msix_vec_count(struct pci_dev *dev) { - return 0; + return -ENOSYS; } static inline int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec) @@ -1164,7 +1164,7 @@ int pci_msi_vec_count(struct pci_dev *dev); int pci_enable_msi_block(struct pci_dev *dev, int nvec); void pci_msi_shutdown(struct pci_dev *dev); void pci_disable_msi(struct pci_dev *dev); -int pci_msix_table_size(struct pci_dev *dev); +int pci_msix_vec_count(struct pci_dev *dev); int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec); void pci_msix_shutdown(struct pci_dev *dev); void pci_disable_msix(struct pci_dev *dev); |