diff options
| author | Christoph Hellwig <hch@lst.de> | 2023-04-11 19:14:57 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-04-18 16:29:59 -0700 |
| commit | 0cd97a0372f21a66d1591114d0a12391e8d977d7 (patch) | |
| tree | 4b098fd4a51822169eeb5bc06f48c4f2a51442d2 /drivers/block/zram/zram_drv.c | |
| parent | fd45af53e220b2fe13a5e8db88c5e92bc3296754 (diff) | |
zram: don't return errors from read_from_bdev_async
bio_alloc will never return a NULL bio when it is allowed to sleep, and
adding a single page to bio with a single vector also can't fail, so
switch to the asserting __bio_add_page variant and drop the error returns.
Link: https://lkml.kernel.org/r/20230411171459.567614-16-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'drivers/block/zram/zram_drv.c')
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 9a35bb0f1a03..24b31957d9e8 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -585,24 +585,16 @@ static void zram_page_end_io(struct bio *bio) bio_put(bio); } -/* - * Returns 1 if the submission is successful. - */ -static int read_from_bdev_async(struct zram *zram, struct page *page, +static void read_from_bdev_async(struct zram *zram, struct page *page, unsigned long entry, struct bio *parent) { struct bio *bio; bio = bio_alloc(zram->bdev, 1, parent ? parent->bi_opf : REQ_OP_READ, GFP_NOIO); - if (!bio) - return -ENOMEM; bio->bi_iter.bi_sector = entry * (PAGE_SIZE >> 9); - if (!bio_add_page(bio, page, PAGE_SIZE, 0)) { - bio_put(bio); - return -EIO; - } + __bio_add_page(bio, page, PAGE_SIZE, 0); if (!parent) bio->bi_end_io = zram_page_end_io; @@ -610,7 +602,6 @@ static int read_from_bdev_async(struct zram *zram, struct page *page, bio_chain(bio, parent); submit_bio(bio); - return 1; } #define PAGE_WB_SIG "page_index=" @@ -840,7 +831,8 @@ static int read_from_bdev(struct zram *zram, struct page *page, return -EIO; return read_from_bdev_sync(zram, page, entry, parent); } - return read_from_bdev_async(zram, page, entry, parent); + read_from_bdev_async(zram, page, entry, parent); + return 1; } #else static inline void reset_bdev(struct zram *zram) {}; |