linux-kernel - Re: [PATCH] blk-mq: put the reference of the io scheduler module after switching back

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Message-ID: <OS0P286MB033887ED7C81DD1F782000DBBE259@OS0P286MB0338.JPNP286.PROD.OUTLOOK.COM>
Date:   Thu, 13 Oct 2022 21:03:44 +0800
From:   Jinlong Chen <chenjinlong2016@...look.com>
To:     axboe@...nel.dk
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] blk-mq: put the reference of the io scheduler module after switching back

Sorry for the disturbance.

This patch is just wrong. elevator_switch_mq does not increase the reference
 count of the io scheduler module to which we are switching. Hence, we do not
 need to put the reference back manually.

Sincerely
Jinlong Chen