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nvdimm-btt: use bvec_kmap_local in btt_rw_integrity

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Using local kmaps slightly reduces the chances to stray writes, and
the bvec interface cleans up the code a little bit.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20220303111905.321089-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2022-03-03 14:19:01 +03:00 committed by Jens Axboe
parent 20072ec828
commit 3205190655
1 changed files with 4 additions and 6 deletions
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10
drivers/nvdimm/btt.c
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@ -1163,17 +1163,15 @@ static int btt_rw_integrity(struct btt *btt, struct bio_integrity_payload *bip,
*/
cur_len = min(len, bv.bv_len);
mem = kmap_atomic(bv.bv_page);
mem = bvec_kmap_local(&bv);
if (rw)
ret = arena_write_bytes(arena, meta_nsoff,
mem + bv.bv_offset, cur_len,
ret = arena_write_bytes(arena, meta_nsoff, mem, cur_len,
NVDIMM_IO_ATOMIC);
else
ret = arena_read_bytes(arena, meta_nsoff,
mem + bv.bv_offset, cur_len,
ret = arena_read_bytes(arena, meta_nsoff, mem, cur_len,
NVDIMM_IO_ATOMIC);
kunmap_atomic(mem);
kunmap_local(mem);
if (ret)
return ret;