Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/roste...

[deliverable/linux.git] / block / blk-core.c

diff --git a/block/blk-core.c b/block/blk-core.c
index 5ab3ac22930ce36246d51b11121e8f44e0a70fb3..ee1a1e7e63ccfc3e735566e3725febee1890bb2e 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1514,7 +1514,10 @@ static inline void __generic_make_request(struct bio *bio)
                if (bio_check_eod(bio, nr_sectors))
                        goto end_io;
 
-               if ((bio->bi_rw & REQ_DISCARD) && !blk_queue_discard(q)) {
+               if ((bio->bi_rw & REQ_DISCARD) &&
+                   (!blk_queue_discard(q) ||
+                    ((bio->bi_rw & REQ_SECURE) &&
+                     !blk_queue_secdiscard(q)))) {
                        err = -EOPNOTSUPP;
                        goto end_io;
                }
@@ -1644,6 +1647,9 @@ EXPORT_SYMBOL(submit_bio);
  */
 int blk_rq_check_limits(struct request_queue *q, struct request *rq)
 {
+       if (rq->cmd_flags & REQ_DISCARD)
+               return 0;
+
        if (blk_rq_sectors(rq) > queue_max_sectors(q) ||
            blk_rq_bytes(rq) > queue_max_hw_sectors(q) << 9) {
                printk(KERN_ERR "%s: over max size limit.\n", __func__);
@@ -2492,6 +2498,8 @@ static void __blk_rq_prep_clone(struct request *dst, struct request *src)
 {
        dst->cpu = src->cpu;
        dst->cmd_flags = (rq_data_dir(src) | REQ_NOMERGE);
+       if (src->cmd_flags & REQ_DISCARD)
+               dst->cmd_flags |= REQ_DISCARD;
        dst->cmd_type = src->cmd_type;
        dst->__sector = blk_rq_pos(src);
        dst->__data_len = blk_rq_bytes(src);