This is needed by drivers/net/ethernet/intel/igb/igb_main.c
Signed-off-by: Hauke Mehrtens <[email protected]>
---
backport/backport-include/linux/pci.h | 12 ++++++++++
backport/compat/backport-3.14.c | 41 +++++++++++++++++++++++++++++++++
2 files changed, 53 insertions(+)
diff --git a/backport/backport-include/linux/pci.h
b/backport/backport-include/linux/pci.h
index 2190831..9eeb09b 100644
--- a/backport/backport-include/linux/pci.h
+++ b/backport/backport-include/linux/pci.h
@@ -245,4 +245,16 @@ static inline int pci_enable_msi_range(struct pci_dev
*dev, int minvec,
#endif
#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,14,0)
+#define pci_enable_msix_range LINUX_BACKPORT(pci_enable_msix_range)
+#ifdef CONFIG_PCI_MSI
+int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
+ int minvec, int maxvec);
+#else
+static inline int pci_enable_msix_range(struct pci_dev *dev,
+ struct msix_entry *entries, int minvec, int maxvec)
+{ return -ENOSYS; }
+#endif
+#endif
+
#endif /* _BACKPORT_LINUX_PCI_H */
diff --git a/backport/compat/backport-3.14.c b/backport/compat/backport-3.14.c
index 9e37c58..bce50dc 100644
--- a/backport/compat/backport-3.14.c
+++ b/backport/compat/backport-3.14.c
@@ -49,3 +49,44 @@ int pci_enable_msi_range(struct pci_dev *dev, int minvec,
int maxvec)
EXPORT_SYMBOL(pci_enable_msi_range);
#endif
#endif
+
+#ifdef CONFIG_PCI_MSI
+/**
+ * pci_enable_msix_range - configure device's MSI-X capability structure
+ * @dev: pointer to the pci_dev data structure of MSI-X device function
+ * @entries: pointer to an array of MSI-X entries
+ * @minvec: minimum number of MSI-X irqs requested
+ * @maxvec: maximum number of MSI-X irqs requested
+ *
+ * Setup the MSI-X capability structure of device function with a maximum
+ * possible number of interrupts in the range between @minvec and @maxvec
+ * upon its software driver call to request for MSI-X mode enabled on its
+ * hardware device function. It returns a negative errno if an error occurs.
+ * If it succeeds, it returns the actual number of interrupts allocated and
+ * indicates the successful configuration of MSI-X capability structure
+ * with new allocated MSI-X interrupts.
+ **/
+int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
+ int minvec, int maxvec)
+{
+ int nvec = maxvec;
+ int rc;
+
+ if (maxvec < minvec)
+ return -ERANGE;
+
+ do {
+ rc = pci_enable_msix(dev, entries, nvec);
+ if (rc < 0) {
+ return rc;
+ } else if (rc > 0) {
+ if (rc < minvec)
+ return -ENOSPC;
+ nvec = rc;
+ }
+ } while (rc);
+
+ return nvec;
+}
+EXPORT_SYMBOL(pci_enable_msix_range);
+#endif
--
1.7.10.4
--
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