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block: cleanup queue_wc_store

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[ Upstream commit c4e21bcd0f9d01f9c5d6c52007f5541871a5b1de ]

Get rid of the local queue_wc_store variable and handling setting and
clearing the QUEUE_FLAG_WC flag diretly instead the if / else if.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230707094239.107968-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: 43c9835b144c ("block: don't allow enabling a cache on devices that don't support it")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christoph Hellwig 2023-07-07 11:42:38 +02:00 committed by Greg Kroah-Hartman
parent 7db90dd1c5
commit e5e0ec8ff1
1 changed files with 3 additions and 11 deletions
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14
block/blk-sysfs.c
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@ -528,21 +528,13 @@ static ssize_t queue_wc_show(struct request_queue *q, char *page)
static ssize_t queue_wc_store(struct request_queue *q, const char *page,
size_t count)
{
int set = -1;
if (!strncmp(page, "write back", 10))
set = 1;
blk_queue_flag_set(QUEUE_FLAG_WC, q);
else if (!strncmp(page, "write through", 13) ||
!strncmp(page, "none", 4))
set = 0;
if (set == -1)
return -EINVAL;
if (set)
blk_queue_flag_set(QUEUE_FLAG_WC, q);
else
blk_queue_flag_clear(QUEUE_FLAG_WC, q);
else
return -EINVAL;
return count;
}