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authorAlexander Gordeev <agordeev@redhat.com>2013-12-30 08:28:15 +0100
committerBjorn Helgaas <bhelgaas@google.com>2014-01-03 17:17:55 -0700
commitff1aa430a2fa43189e89c7ddd559f0bee2298288 (patch)
tree731237d3f796f92aa31b41a8fda7f0e38c707fbb /include/linux/pci.h
parent7b92b4f61ec49cb1a5813298f35258bd7ecd3667 (diff)
downloadblackbird-op-linux-ff1aa430a2fa43189e89c7ddd559f0bee2298288.tar.gz
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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 'include/linux/pci.h')
-rw-r--r--include/linux/pci.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 86dcf006adcc..cf6125ba649d 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1169,9 +1169,9 @@ 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)
@@ -1198,7 +1198,7 @@ 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);
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