From: Sergey Senozhatsky senozhatsky@chromium.org
mainline inclusion from mainline-v6.2-rc1 commit 9fda785dbd14cfc7d874d00d2b007cb143aa48d0 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I7TWVA CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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Re-phrase writeback BIO error comment.
Link: https://lkml.kernel.org/r/20221109115047.2921851-7-senozhatsky@chromium.org Reported-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Sergey Senozhatsky senozhatsky@chromium.org Acked-by: Minchan Kim minchan@kernel.org Cc: Alexey Romanov avromanov@sberdevices.ru Cc: Nhat Pham nphamcs@gmail.com Cc: Nitin Gupta ngupta@vflare.org Cc: Suleiman Souhlal suleiman@google.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Jinjiang Tu tujinjiang@huawei.com --- drivers/block/zram/zram_drv.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index a9b4dd68cccf..3f553ba0cc94 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -751,8 +751,12 @@ static ssize_t writeback_store(struct device *dev, zram_clear_flag(zram, index, ZRAM_IDLE); zram_slot_unlock(zram, index); /* - * Return last IO error unless every IO were - * not suceeded. + * BIO errors are not fatal, we continue and simply + * attempt to writeback the remaining objects (pages). + * At the same time we need to signal user-space that + * some writes (at least one, but also could be all of + * them) were not successful and we do so by returning + * the most recent BIO error. */ ret = err; continue;