diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-05-09 15:59:45 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-05-11 15:07:58 -0600 |
| commit | 34ab96e6c5c0eeba11816f8887716da0b5a9a7db (patch) | |
| tree | 24a3e44ad0839e6a8f84cc76d0ebe4ed1da9bcc1 /drivers/mtd/mtd_blkdevs.c | |
| parent | 7c2d748e847695c89427fb23a7d5ab0a04ad2ccc (diff) | |
| download | linux-34ab96e6c5c0eeba11816f8887716da0b5a9a7db.tar.gz | |
mtd_blkdevs: handle highmem pages
Just kmap the single payload page before passing it on to the FTL. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/mtd/mtd_blkdevs.c')
| -rw-r--r-- | drivers/mtd/mtd_blkdevs.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index 16ae4ae8e8f9..29c0bfd74e8a 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -82,7 +82,6 @@ static blk_status_t do_blktrans_request(struct mtd_blktrans_ops *tr, block = blk_rq_pos(req) << 9 >> tr->blkshift; nsect = blk_rq_cur_bytes(req) >> tr->blkshift; - buf = bio_data(req->bio); if (req_op(req) == REQ_OP_FLUSH) { if (tr->flush(dev)) @@ -100,9 +99,14 @@ static blk_status_t do_blktrans_request(struct mtd_blktrans_ops *tr, return BLK_STS_IOERR; return BLK_STS_OK; case REQ_OP_READ: - for (; nsect > 0; nsect--, block++, buf += tr->blksize) - if (tr->readsect(dev, block, buf)) + buf = kmap(bio_page(req->bio)) + bio_offset(req->bio); + for (; nsect > 0; nsect--, block++, buf += tr->blksize) { + if (tr->readsect(dev, block, buf)) { + kunmap(bio_page(req->bio)); return BLK_STS_IOERR; + } + } + kunmap(bio_page(req->bio)); rq_flush_dcache_pages(req); return BLK_STS_OK; case REQ_OP_WRITE: @@ -110,9 +114,14 @@ static blk_status_t do_blktrans_request(struct mtd_blktrans_ops *tr, return BLK_STS_IOERR; rq_flush_dcache_pages(req); - for (; nsect > 0; nsect--, block++, buf += tr->blksize) - if (tr->writesect(dev, block, buf)) + buf = kmap(bio_page(req->bio)) + bio_offset(req->bio); + for (; nsect > 0; nsect--, block++, buf += tr->blksize) { + if (tr->writesect(dev, block, buf)) { + kunmap(bio_page(req->bio)); return BLK_STS_IOERR; + } + } + kunmap(bio_page(req->bio)); return BLK_STS_OK; default: return BLK_STS_IOERR; @@ -418,7 +427,6 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new) new->rq->queuedata = new; blk_queue_logical_block_size(new->rq, tr->blksize); - blk_queue_bounce_limit(new->rq, BLK_BOUNCE_HIGH); blk_queue_flag_set(QUEUE_FLAG_NONROT, new->rq); blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, new->rq); |