linux-kernel - Re: [PATCH v6 4/4] sd: change to auto suspend mode

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Message-ID: <50EA95FC.2020103@intel.com>
Date:	Mon, 07 Jan 2013 17:31:40 +0800
From:	Aaron Lu <aaron.lu@...el.com>
To:	Oliver Neukum <oneukum@...e.de>
CC:	Alan Stern <stern@...land.harvard.edu>,
	Jens Axboe <axboe@...nel.dk>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	James Bottomley <James.Bottomley@...senpartnership.com>,
	linux-pm@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Aaron Lu <aaron.lwe@...il.com>,
	Shane Huang <shane.huang@....com>
Subject: Re: [PATCH v6 4/4] sd: change to auto suspend mode

On 01/07/2013 05:19 PM, Oliver Neukum wrote:
> On Sunday 06 January 2013 16:41:37 Aaron Lu wrote:
>> From: Lin Ming <ming.m.lin@...el.com>
>>
>> Uses block layer runtime pm helper functions in
>> scsi_runtime_suspend/resume.
>> Remove scsi_autopm_* from sd open/release path and check_events path.
>> And remove the quiesce call in runtime suspend path, as we know there is
>> no request to quiesce for the device.
> 
> How does this handle ioctl() ?

The ioctl code will allocate a new request and execute it through block
layer API, which involves adding the request to the queue and releasing
it when it is finished.

Thanks,
Aaron

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