Re: [PATCH 6/6] treewide: remove check of list iterator against head past the loop body
From: Dan Carpenter <hidden>
Date: 2022-02-28 13:15:52
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On Mon, Feb 28, 2022 at 12:08:22PM +0100, Jakob Koschel wrote:
quoted hunk ↗ jump to hunk
diff --git a/drivers/infiniband/hw/hfi1/tid_rdma.c b/drivers/infiniband/hw/hfi1/tid_rdma.c index 2a7abf7a1f7f..a069847b56aa 100644 --- a/drivers/infiniband/hw/hfi1/tid_rdma.c +++ b/drivers/infiniband/hw/hfi1/tid_rdma.c@@ -1239,7 +1239,7 @@ static int kern_alloc_tids(struct tid_rdma_flow *flow) struct hfi1_ctxtdata *rcd = flow->req->rcd; struct hfi1_devdata *dd = rcd->dd; u32 ngroups, pageidx = 0; - struct tid_group *group = NULL, *used; + struct tid_group *group = NULL, *used, *tmp; u8 use; flow->tnode_cnt = 0;@@ -1248,13 +1248,15 @@ static int kern_alloc_tids(struct tid_rdma_flow *flow) goto used_list; /* First look at complete groups */ - list_for_each_entry(group, &rcd->tid_group_list.list, list) { - kern_add_tid_node(flow, rcd, "complete groups", group, - group->size); + list_for_each_entry(tmp, &rcd->tid_group_list.list, list) { + kern_add_tid_node(flow, rcd, "complete groups", tmp, + tmp->size); - pageidx += group->size; - if (!--ngroups) + pageidx += tmp->size; + if (!--ngroups) { + group = tmp; break; + } } if (pageidx >= flow->npagesets)@@ -1277,7 +1279,7 @@ static int kern_alloc_tids(struct tid_rdma_flow *flow) * However, if we are at the head, we have reached the end of the
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* complete groups list from the first loop above
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*/
Originally this code tested for an open code list_is_head() so the comment made sense, but it's out of date now. Just delete it.
- if (group && &group->list == &rcd->tid_group_list.list) + if (!group) goto bail_eagain; group = list_prepare_entry(group, &rcd->tid_group_list.list, list);
regards, dan carpenter