[PATCH 5.10 126/152] NFS/pNFS: Dont call pnfs_free_bucket_lseg() before removing the request

[Greg Kroah-Hartman]

From: Trond Myklebust <trond.mykleb...@hammerspace.com>

commit 1757655d780d9d29bc4b60e708342e94924f7ef3 upstream.

In pnfs_generic_clear_request_commit(), we try calling
pnfs_free_bucket_lseg() before we remove the request from the DS bucket.
That will always fail, since the point is to test for whether or not
that bucket is empty.

Fixes: c84bea59449a ("NFS/pNFS: Simplify bucket layout segment reference 
counting")
Signed-off-by: Trond Myklebust <trond.mykleb...@hammerspace.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 fs/nfs/pnfs_nfs.c |   14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

--- a/fs/nfs/pnfs_nfs.c
+++ b/fs/nfs/pnfs_nfs.c
@@ -78,22 +78,18 @@ void
 pnfs_generic_clear_request_commit(struct nfs_page *req,
                                  struct nfs_commit_info *cinfo)
 {
-       struct pnfs_layout_segment *freeme = NULL;
+       struct pnfs_commit_bucket *bucket = NULL;
 
        if (!test_and_clear_bit(PG_COMMIT_TO_DS, &req->wb_flags))
                goto out;
        cinfo->ds->nwritten--;
-       if (list_is_singular(&req->wb_list)) {
-               struct pnfs_commit_bucket *bucket;
-
+       if (list_is_singular(&req->wb_list))
                bucket = list_first_entry(&req->wb_list,
-                                         struct pnfs_commit_bucket,
-                                         written);
-               freeme = pnfs_free_bucket_lseg(bucket);
-       }
+                                         struct pnfs_commit_bucket, written);
 out:
        nfs_request_remove_commit_list(req, cinfo);
-       pnfs_put_lseg(freeme);
+       if (bucket)
+               pnfs_put_lseg(pnfs_free_bucket_lseg(bucket));
 }
 EXPORT_SYMBOL_GPL(pnfs_generic_clear_request_commit);