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NFS: Fix a bogus warning in nfs_generic_pgio 

It is OK for pageused == pagecount in the loop, as long as we don't add
another entry to the *pages array. Move the test so that it only triggers
in that case.

Reported-by: Steve Dickson <SteveD@redhat.com>
Fixes: bba5c1887a (nfs: disallow duplicate pages in pgio page vectors)
Cc: Weston Andros Adamson <dros@primarydata.com>
Cc: stable@vger.kernel.org # 3.16.x
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2014-10-13 10:56:12 -04:00
parent 3caa0c6ed7
commit b8fb9c30f2
1 changed files with 3 additions and 4 deletions
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7
fs/nfs/pagelist.c
View File

@ -752,12 +752,11 @@ int nfs_generic_pgio(struct nfs_pageio_descriptor *desc,
nfs_list_remove_request(req);
nfs_list_add_request(req, &hdr->pages);
if (WARN_ON_ONCE(pageused >= pagecount))
return nfs_pgio_error(desc, hdr);
if (!last_page || last_page != req->wb_page) {
*pages++ = last_page = req->wb_page;
pageused++;
if (pageused > pagecount)
break;
*pages++ = last_page = req->wb_page;
}
}
if (WARN_ON_ONCE(pageused != pagecount))