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-rw-r--r--kernel/irq/msi.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 19e9dfbe97fa..8a3e872798f3 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -18,20 +18,42 @@
/* Temparory solution for building, will be removed later */
#include <linux/pci.h>
-struct msi_desc *alloc_msi_entry(struct device *dev)
+/**
+ * alloc_msi_entry - Allocate an initialize msi_entry
+ * @dev: Pointer to the device for which this is allocated
+ * @nvec: The number of vectors used in this entry
+ * @affinity: Optional pointer to an affinity mask array size of @nvec
+ *
+ * If @affinity is not NULL then a an affinity array[@nvec] is allocated
+ * and the affinity masks from @affinity are copied.
+ */
+struct msi_desc *
+alloc_msi_entry(struct device *dev, int nvec, const struct cpumask *affinity)
{
- struct msi_desc *desc = kzalloc(sizeof(*desc), GFP_KERNEL);
+ struct msi_desc *desc;
+
+ desc = kzalloc(sizeof(*desc), GFP_KERNEL);
if (!desc)
return NULL;
INIT_LIST_HEAD(&desc->list);
desc->dev = dev;
+ desc->nvec_used = nvec;
+ if (affinity) {
+ desc->affinity = kmemdup(affinity,
+ nvec * sizeof(*desc->affinity), GFP_KERNEL);
+ if (!desc->affinity) {
+ kfree(desc);
+ return NULL;
+ }
+ }
return desc;
}
void free_msi_entry(struct msi_desc *entry)
{
+ kfree(entry->affinity);
kfree(entry);
}