xfs_repair: check num before bplist[num]

smatch complained about checking an array index before indexing the
array, so fix that.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

diff --git a/repair/prefetch.c b/repair/prefetch.c
index de36c5fe2cc9d2cd321c741be94376f96a9ea589..22efd54bf9ebf340a9c448815b20293dde96144e 100644 (file)
--- a/repair/prefetch.c
+++ b/repair/prefetch.c
@@ -494,7 +494,7 @@ pf_batch_read(
                                                args->last_bno_read, &fsbno);
                        max_fsbno = fsbno + pf_max_fsbs;
                }
-               while (bplist[num] && num < MAX_BUFS && fsbno < max_fsbno) {
+               while (num < MAX_BUFS && bplist[num] && fsbno < max_fsbno) {
                        /*
                         * Discontiguous buffers need special handling, so stop
                         * gathering new buffers and process the list and this