---

yaml --- r: 139319 b: refs/heads/master c: a52e2e3 h: refs/heads/master i: 139317: baa96cc 139315: 3667d86 139311: 64e25de v: v3
git-mirror · Mar 20, 2009 · ff11fe1 · ff11fe1
1 parent 4f4a788
commit ff11fe1
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Showing 3 changed files with 25 additions and 6 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a447b772826fde2a3abfd9bb943dee8750994c55
+refs/heads/master: a52e2e3513d4beafe8fe8699f1519b021c2d05ba
diff --git a/trunk/drivers/pci/msi.c b/trunk/drivers/pci/msi.c
@@ -674,6 +674,23 @@ static int msi_free_irqs(struct pci_dev* dev)
 	return 0;
 }
 
+/**
+ * pci_msix_table_size - return the number of device's MSI-X table entries
+ * @dev: pointer to the pci_dev data structure of MSI-X device function
+ */
+int pci_msix_table_size(struct pci_dev *dev)
+{
+	int pos;
+	u16 control;
+
+	pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
+	if (!pos)
+		return 0;
+
+	pci_read_config_word(dev, msi_control_reg(pos), &control);
+	return multi_msix_capable(control);
+}
+
 /**
  * pci_enable_msix - configure device's MSI-X capability structure
  * @dev: pointer to the pci_dev data structure of MSI-X device function
@@ -691,9 +708,8 @@ static int msi_free_irqs(struct pci_dev* dev)
  **/
 int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec)
 {
-	int status, pos, nr_entries;
+	int status, nr_entries;
 	int i, j;
-	u16 control;
 
 	if (!entries)
  		return -EINVAL;
@@ -702,9 +718,7 @@ int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec)
 	if (status)
 		return status;
 
-	pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
-	pci_read_config_word(dev, msi_control_reg(pos), &control);
-	nr_entries = multi_msix_capable(control);
+	nr_entries = pci_msix_table_size(dev);
 	if (nvec > nr_entries)
 		return -EINVAL;
 

diff --git a/trunk/include/linux/pci.h b/trunk/include/linux/pci.h
@@ -799,6 +799,10 @@ 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)
+{
+	return 0;
+}
 static inline int pci_enable_msix(struct pci_dev *dev,
 				  struct msix_entry *entries, int nvec)
 {
@@ -823,6 +827,7 @@ static inline int pci_msi_enabled(void)
 extern int pci_enable_msi(struct pci_dev *dev);
 extern void pci_msi_shutdown(struct pci_dev *dev);
 extern void pci_disable_msi(struct pci_dev *dev);
+extern int pci_msix_table_size(struct pci_dev *dev);
 extern int pci_enable_msix(struct pci_dev *dev,
 	struct msix_entry *entries, int nvec);
 extern void pci_msix_shutdown(struct pci_dev *dev);