[openib-general] [PATCH] allow chaining ib_fmr structures in a list

[Sean Hefty]

This patch changes ib_unmap_fmr from taking an array to using a linked list.

- Sean

-- Index: ib_verbs.h
===================================================================
--- ib_verbs.h	(revision 724)
+++ ib_verbs.h	(working copy)
@@ -117,9 +117,9 @@
 struct ib_fmr {
 	struct ib_device	*device;
 	struct ib_pd		*pd;
+	struct list_head	list;
 	u32			lkey;
 	u32			rkey;
-	atomic_t		usecnt;
 };
 
 enum ib_device_cap_flags {
@@ -714,7 +714,7 @@
 					 struct ib_phys_buf *phys_buf_array,
 					 int num_phys_buf,
 					 u64 *iova_start);
-	int		 (*unmap_fmr)(struct ib_fmr **fmr_array, int fmr_cnt);
+	int		 (*unmap_fmr)(struct ib_fmr *fmr);
 	int		 (*dealloc_fmr)(struct ib_fmr *fmr);
 	int		 (*attach_mcast)(struct ib_qp *qp, union ib_gid *gid,
 					 u16 lid);
@@ -888,11 +888,9 @@
 					 iova_start);
 }
 
-static inline int ib_unmap_fmr(struct ib_fmr **fmr_array,
-			       int fmr_cnt)
+static inline int ib_unmap_fmr(struct ib_fmr *fmr)
 {
-	/* Requires all FMRs to come from same device. */
-	return fmr_array[0]->device->unmap_fmr(fmr_array, fmr_cnt);
+	return fmr->device->unmap_fmr(fmr);
 }
 
 int ib_dealloc_fmr(struct ib_fmr *fmr);