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nvdimm-blk: use bvec_kmap_local in nd_blk_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/20220303111905.321089-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2022-03-03 14:19:00 +03:00 committed by Jens Axboe
parent bd3d3203eb
commit 20072ec828
1 changed files with 3 additions and 4 deletions
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7
drivers/nvdimm/blk.c
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@ -88,10 +88,9 @@ static int nd_blk_rw_integrity(struct nd_namespace_blk *nsblk,
*/
cur_len = min(len, bv.bv_len);
iobuf = kmap_atomic(bv.bv_page);
err = ndbr->do_io(ndbr, dev_offset, iobuf + bv.bv_offset,
cur_len, rw);
kunmap_atomic(iobuf);
iobuf = bvec_kmap_local(&bv);
err = ndbr->do_io(ndbr, dev_offset, iobuf, cur_len, rw);
kunmap_local(iobuf);
if (err)
return err;