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

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To: axboe@xxxxxxxxx
Subject: Re: [PATCH] blk-mq: put the reference of the io scheduler module after switching back
From: Jinlong Chen <chenjinlong2016@xxxxxxxxxxx>
Date: Thu, 13 Oct 2022 21:03:44 +0800
Cc: linux-block@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <OS0P286MB0338E8D41770BFDE7B3A4EBBBE229@OS0P286MB0338.JPNP286.PROD.OUTLOOK.COM>
References: <OS0P286MB0338E8D41770BFDE7B3A4EBBBE229@OS0P286MB0338.JPNP286.PROD.OUTLOOK.COM>

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

Follow-Ups:
- Re: [PATCH] blk-mq: put the reference of the io scheduler module after switching back
  - From: Yu Kuai

References:
- [PATCH v2] blk-mq: put the reference of the io scheduler module after switching back
  - From: Jinlong Chen

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