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zram: clarify writeback_store() comment

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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>
This commit is contained in:
Sergey Senozhatsky 2022-11-09 20:50:40 +09:00 committed by Andrew Morton
parent 60e9b39ebe
commit 9fda785dbd
1 changed files with 6 additions and 2 deletions
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8
drivers/block/zram/zram_drv.c
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@ -769,8 +769,12 @@ 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;