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f2fs: disable the discard option when device doesn't support 

Current f2fs check the whether the blk device can support discard.
However, the code will cause the discard option cannot be enabled.
Because the clear_opt(sbi, DISCARD) will be invoked forever.

This patch can fix this issue.

Jaegeuk Kim:
 The original patch was intended to disable the discard option when device
 does not support trim command.
 Rather than remaining the buggy patch, let's replace with this patch as
 an integrated one.

Signed-off-by: Chenxi Mao <chenxi.mao2013@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
hifive-unleashed-5.1
Chenxi Mao 2015-05-30 22:56:46 +08:00 committed by Jaegeuk Kim
parent 4683ff837c
commit 96c6dd59bf
1 changed files with 3 additions and 1 deletions
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4
fs/f2fs/super.c
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@ -1237,10 +1237,12 @@ try_onemore:
if (test_opt(sbi, DISCARD)) {
struct request_queue *q = bdev_get_queue(sb->s_bdev);
if (!blk_queue_discard(q))
if (!blk_queue_discard(q)) {
f2fs_msg(sb, KERN_WARNING,
"mounting with \"discard\" option, but "
"the device does not support discard");
clear_opt(sbi, DISCARD);
}
}
sbi->s_kobj.kset = f2fs_kset;