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.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
---
drivers/block/zram/zram_drv.c | 16 ++++------------
1 file changed, 4 insertions(+), 12 deletions(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 9d066c6a4f8265..ec6df834189b7a 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -584,24 +584,16 @@ 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;
@@ -609,7 +601,6 @@ 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="
@@ -845,7 +836,8 @@ static int read_from_bdev(struct zram *zram, struct page *page,
atomic64_inc(&zram->stats.bd_reads);
if (sync)
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) {};
--
2.39.2
