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Message-ID: <20221129030147.27400-11-shikemeng@huawei.com>
Date: Tue, 29 Nov 2022 11:01:47 +0800
From: Kemeng Shi <shikemeng@...wei.com>
To: <tj@...nel.org>, <josef@...icpanda.com>, <axboe@...nel.dk>
CC: <cgroups@...r.kernel.org>, <linux-block@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <shikemeng@...wei.com>
Subject: [PATCH v2 10/10] blk-throttle: avoid dead code in throtl_hierarchy_can_upgrade
Function throtl_hierarchy_can_upgrade will always return from while loop,
so the return outside while loop is never reached. Break the loop when
we traverse to root as throtl_hierarchy_can_downgrade do to avoid dead
code.
Signed-off-by: Kemeng Shi <shikemeng@...wei.com>
---
block/blk-throttle.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 4c80f2aa1e29..9946524de158 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -1854,7 +1854,7 @@ static bool throtl_hierarchy_can_upgrade(struct throtl_grp *tg)
return true;
tg = sq_to_tg(tg->service_queue.parent_sq);
if (!tg || !tg_to_blkg(tg)->parent)
- return false;
+ break;
}
return false;
}
--
2.30.0
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