Merge tag 'for-5.19/block-2022-06-02' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "Just a collection of fixes that have been queued up since the initial
  merge window pull request, the majority of which are targeted for
  stable as well.

  One bio_set fix that fixes an issue with the dm adoption of cached bio
  structs that got introduced in this merge window"

* tag 'for-5.19/block-2022-06-02' of git://git.kernel.dk/linux-block:
  block: Fix potential deadlock in blk_ia_range_sysfs_show()
  block: fix bio_clone_blkg_association() to associate with proper blkcg_gq
  block: remove useless BUG_ON() in blk_mq_put_tag()
  blk-mq: do not update io_ticks with passthrough requests
  block: make bioset_exit() fully resilient against being called twice
  block: use bio_queue_enter instead of blk_queue_enter in bio_poll
  block: document BLK_STS_AGAIN usage
  block: take destination bvec offsets into account in bio_copy_data_iter
  blk-iolatency: Fix inflight count imbalances and IO hangs on offline
  blk-mq: don't touch ->tagset in blk_mq_get_sq_hctx

1 files changed, 6 insertions, 3 deletions

diff --git a/block/bio.c b/block/bio.c
index a3893d80dccc..f92d0223247b 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -722,6 +722,7 @@ static void bio_alloc_cache_destroy(struct bio_set *bs)
 		bio_alloc_cache_prune(cache, -1U);
 	}
 	free_percpu(bs->cache);
+	bs->cache = NULL;
 }
 
 /**
@@ -1366,10 +1367,12 @@ void bio_copy_data_iter(struct bio *dst, struct bvec_iter *dst_iter,
 		struct bio_vec src_bv = bio_iter_iovec(src, *src_iter);
 		struct bio_vec dst_bv = bio_iter_iovec(dst, *dst_iter);
 		unsigned int bytes = min(src_bv.bv_len, dst_bv.bv_len);
-		void *src_buf;
+		void *src_buf = bvec_kmap_local(&src_bv);
+		void *dst_buf = bvec_kmap_local(&dst_bv);
 
-		src_buf = bvec_kmap_local(&src_bv);
-		memcpy_to_bvec(&dst_bv, src_buf);
+		memcpy(dst_buf, src_buf, bytes);
+
+		kunmap_local(dst_buf);
 		kunmap_local(src_buf);
 
 		bio_advance_iter_single(src, src_iter, bytes);