block: fix duplicate headers for /proc/partitions
seqf can be started multiple times for a read and the header should be
printed only for the initial one. Fix it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/block/genhd.c b/block/genhd.c
index ed926b7..8acaff0 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -697,7 +697,7 @@
static void *p;
p = disk_seqf_start(seqf, pos);
- if (!IS_ERR(p) && p)
+ if (!IS_ERR(p) && p && !*pos)
seq_puts(seqf, "major minor #blocks name\n\n");
return p;
}