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| author | Gao Xiang <gaoxiang25@huawei.com> | 2019-09-04 10:09:02 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-05 20:10:08 +0200 |
| commit | a5c0b7802cc9631e0dee67abd30c2f022621ae7c (patch) | |
| tree | 8d12f4baf75cde72c03cd3fceb73f1f09dd9ed4c /fs/erofs/data.c | |
| parent | 688a5f2ed486914c28e17062139c07897307ee01 (diff) | |
| download | linux-a5c0b7802cc9631e0dee67abd30c2f022621ae7c.tar.gz | |
erofs: localize erofs_grab_bio()
As Christoph pointed out [1], "erofs_grab_bio tries to handle a bio_alloc failure, except that the function will not actually fail due the mempool backing it." Sorry about useless code, fix it now and localize erofs_grab_bio [2]. [1] https://lore.kernel.org/r/20190830162812.GA10694@infradead.org/ [2] https://lore.kernel.org/r/20190902122016.GL15931@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-16-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/erofs/data.c')
| -rw-r--r-- | fs/erofs/data.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/fs/erofs/data.c b/fs/erofs/data.c index be11b5ea9d2e..0136ea117934 100644 --- a/fs/erofs/data.c +++ b/fs/erofs/data.c @@ -38,6 +38,19 @@ static inline void read_endio(struct bio *bio) bio_put(bio); } +static struct bio *erofs_grab_raw_bio(struct super_block *sb, + erofs_blk_t blkaddr, + unsigned int nr_pages) +{ + struct bio *bio = bio_alloc(GFP_NOIO, nr_pages); + + bio->bi_end_io = read_endio; + bio_set_dev(bio, sb->s_bdev); + bio->bi_iter.bi_sector = (sector_t)blkaddr << LOG_SECTORS_PER_BLOCK; + bio->bi_private = sb; + return bio; +} + /* prio -- true is used for dir */ struct page *__erofs_get_meta_page(struct super_block *sb, erofs_blk_t blkaddr, bool prio, bool nofail) @@ -62,12 +75,7 @@ repeat: if (!PageUptodate(page)) { struct bio *bio; - bio = erofs_grab_bio(sb, blkaddr, 1, sb, read_endio, nofail); - if (IS_ERR(bio)) { - DBG_BUGON(nofail); - err = PTR_ERR(bio); - goto err_out; - } + bio = erofs_grab_raw_bio(sb, blkaddr, 1); if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE) { err = -EFAULT; @@ -276,13 +284,7 @@ submit_bio_retry: if (nblocks > BIO_MAX_PAGES) nblocks = BIO_MAX_PAGES; - bio = erofs_grab_bio(sb, blknr, nblocks, sb, - read_endio, false); - if (IS_ERR(bio)) { - err = PTR_ERR(bio); - bio = NULL; - goto err_out; - } + bio = erofs_grab_raw_bio(sb, blknr, nblocks); } err = bio_add_page(bio, page, PAGE_SIZE, 0); |