IB/hfi1: Remove redundant pageidx variable

In hfi1_user_exp_rcv_setup(), variable pageidx mirrors
variable tididx.  Remove pageidx and its use as an argument
to program_rcvarray().
Signed-off-by: Dean Luick <dean.luick@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Link: https://lore.kernel.org/r/167329104365.1472990.14264918308557487946.stgit@awfm-02.cornelisnetworks.comSigned-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/hw/hfi1/user_exp_rcv.c

@@ -24,8 +24,7 @@ static bool tid_rb_invalidate(struct mmu_interval_notifier *mni,
 			      const struct mmu_notifier_range *range,
 			      unsigned long cur_seq);
 static int program_rcvarray(struct hfi1_filedata *fd, struct tid_user_buf *,
-			    struct tid_group *grp,
-			    unsigned int start, u16 count,
+			    struct tid_group *grp, u16 count,
 			    u32 *tidlist, unsigned int *tididx,
 			    unsigned int *pmapped);
 static int unprogram_rcvarray(struct hfi1_filedata *fd, u32 tidinfo,
@@ -249,7 +248,7 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
 	int ret = 0, need_group = 0, pinned;
 	struct hfi1_ctxtdata *uctxt = fd->uctxt;
 	struct hfi1_devdata *dd = uctxt->dd;
-	unsigned int ngroups, pageidx = 0, pageset_count,
+	unsigned int ngroups, pageset_count,
 		tididx = 0, mapped, mapped_pages = 0;
 	u32 *tidlist = NULL;
 	struct tid_user_buf *tidbuf;
@@ -318,7 +317,7 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
 			tid_group_pop(&uctxt->tid_group_list);
 
 		ret = program_rcvarray(fd, tidbuf, grp,
-				       pageidx, dd->rcv_entries.group_size,
+				       dd->rcv_entries.group_size,
 				       tidlist, &tididx, &mapped);
 		/*
 		 * If there was a failure to program the RcvArray
@@ -334,11 +333,10 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
 
 		tid_group_add_tail(grp, &uctxt->tid_full_list);
 		ngroups--;
-		pageidx += ret;
 		mapped_pages += mapped;
 	}
 
-	while (pageidx < pageset_count) {
+	while (tididx < pageset_count) {
 		struct tid_group *grp, *ptr;
 		/*
 		 * If we don't have any partially used tid groups, check
@@ -360,11 +358,11 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
 		 */
 		list_for_each_entry_safe(grp, ptr, &uctxt->tid_used_list.list,
 					 list) {
-			unsigned use = min_t(unsigned, pageset_count - pageidx,
+			unsigned use = min_t(unsigned, pageset_count - tididx,
 					     grp->size - grp->used);
 
 			ret = program_rcvarray(fd, tidbuf, grp,
-					       pageidx, use, tidlist,
+					       use, tidlist,
 					       &tididx, &mapped);
 			if (ret < 0) {
 				hfi1_cdbg(TID,
@@ -376,11 +374,10 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd,
 					tid_group_move(grp,
 						       &uctxt->tid_used_list,
 						       &uctxt->tid_full_list);
-				pageidx += ret;
 				mapped_pages += mapped;
 				need_group = 0;
 				/* Check if we are done so we break out early */
-				if (pageidx >= pageset_count)
+				if (tididx >= pageset_count)
 					break;
 			} else if (WARN_ON(ret == 0)) {
 				/*
@@ -589,7 +586,6 @@ static u32 find_phys_blocks(struct tid_user_buf *tidbuf, unsigned int npages)
  *	  struct tid_pageset holding information on physically contiguous
  *	  chunks from the user buffer), and other fields.
  * @grp: RcvArray group
- * @start: starting index into sets array
  * @count: number of struct tid_pageset's to program
  * @tidlist: the array of u32 elements when the information about the
  *           programmed RcvArray entries is to be encoded.
@@ -609,14 +605,14 @@ static u32 find_phys_blocks(struct tid_user_buf *tidbuf, unsigned int npages)
  * number of RcvArray entries programmed.
  */
 static int program_rcvarray(struct hfi1_filedata *fd, struct tid_user_buf *tbuf,
-			    struct tid_group *grp,
-			    unsigned int start, u16 count,
+			    struct tid_group *grp, u16 count,
 			    u32 *tidlist, unsigned int *tididx,
 			    unsigned int *pmapped)
 {
 	struct hfi1_ctxtdata *uctxt = fd->uctxt;
 	struct hfi1_devdata *dd = uctxt->dd;
 	u16 idx;
+	unsigned int start = *tididx;
 	u32 tidinfo = 0, rcventry, useidx = 0;
 	int mapped = 0;