linux-kernel - Re: [PATCH v3 6/7] scsi: sr: balance sr disk events block depth

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Date:	Thu, 26 Jul 2012 14:54:01 +0400
From:	Sergei Shtylyov <sshtylyov@...sta.com>
To:	Aaron Lu <aaron.lu@....com>
CC:	James Bottomley <James.Bottomley@...senPartnership.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Jeff Garzik <jgarzik@...ox.com>, Lin Ming <minggr@...il.com>,
	Jeff Wu <jeff.wu@....com>, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-ide@...r.kernel.org, Aaron Lu <aaron.lwe@...il.com>
Subject: Re: [PATCH v3 6/7] scsi: sr: balance sr disk events block depth

Hello.

On 26-07-2012 14:05, Aaron Lu wrote:

> When the ODD is resumed, disk_unblock_events should be called when:
> 1 The ODD is runtime resumed;
> 2 System is resuming from S3 and the ODD is runtime suspended before S3;
> But not when the system is resuming from S3 and the ODD is runtime
> active before S3.

> So seperate the resume calls, one for system resume and one for runtime
> resume to do different things accordingly.

> Signed-off-by: Aaron Lu <aaron.lu@....com>
> ---
>   drivers/scsi/sr.c | 21 +++++++++++++++++++++
>   1 file changed, 21 insertions(+)

> diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
> index fd1c2f6..b8c2f9d 100644
> --- a/drivers/scsi/sr.c
> +++ b/drivers/scsi/sr.c
[...]
> @@ -211,6 +217,21 @@ static int sr_suspend(struct device *dev, pm_message_t msg)
>
>   static int sr_resume(struct device *dev)
>   {
> +	struct scsi_cd *cd = dev_get_drvdata(dev);
> +
> +	/*
> +	 * If ODD is runtime suspended before system pm, unblock disk
> +	 * events now since on system resume, we will fully resume it

    Comma not needed.

> +	 * and set its rumtime status to active.

    s/rumtime/runtime/. Nice typo. %-)

WBR, Sergei

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