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block: correctly report cache type

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Check the features flag and the override flag using the
blk_queue_write_cache, helper otherwise we're going to always
report "write through".

Fixes: 1122c0c1cc ("block: move cache control settings out of queue->flags")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20240626142637.300624-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2024-06-26 16:26:23 +02:00 committed by Jens Axboe
parent 573d5abf3d
commit 78887d004f
1 changed files with 3 additions and 3 deletions
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6
block/blk-sysfs.c
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@ -453,9 +453,9 @@ static ssize_t queue_io_timeout_store(struct request_queue *q, const char *page,
static ssize_t queue_wc_show(struct request_queue *q, char *page)
{
if (q->limits.features & BLK_FLAG_WRITE_CACHE_DISABLED)
return sprintf(page, "write through\n");
return sprintf(page, "write back\n");
if (blk_queue_write_cache(q))
return sprintf(page, "write back\n");
return sprintf(page, "write through\n");
}
static ssize_t queue_wc_store(struct request_queue *q, const char *page,