linux-kernel - Re: [PATCH v3 2/4] usb: storage: add support for write cache quirk on usb hdd

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Date:	Mon, 11 Jun 2012 21:11:29 +0400
From:	Sergei Shtylyov <sshtylyov@...sta.com>
To:	Namjae Jeon <linkinjeon@...il.com>
CC:	James.Bottomley@...senpartnership.com, gregkh@...uxfoundation.org,
	mdharm-usb@...-eyed-alien.net, stern@...land.harvard.edu,
	bvanassche@....org, linux-usb@...r.kernel.org,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Namjae Jeon <namjae.jeon@...sung.com>,
	Pankaj Kumar <pankaj.km@...sung.com>,
	Amit Sahrawat <a.sahrawat@...sung.com>
Subject: Re: [PATCH v3 2/4] usb: storage: add support for write cache quirk
 on usb hdd

Hello.

On 10-06-2012 4:30, Namjae Jeon wrote:

>>> Add support for write cache quirk on usb hdd. scsi driver will be set to
>>> wce
>>> by detecting write cache quirk in quirk list when plugging usb hdd.

>>> Signed-off-by: Namjae Jeon<namjae.jeon@...sung.com>
>>> Signed-off-by: Pankaj Kumar<pankaj.km@...sung.com>
>>> Signed-off-by: Amit Sahrawat<a.sahrawat@...sung.com>
>>> ---
>>>    drivers/usb/storage/scsiglue.c |    5 +++++
>>>    drivers/usb/storage/usb.c      |    5 ++++-
>>>    include/linux/usb_usual.h      |    4 +++-
>>>    3 files changed, 12 insertions(+), 2 deletions(-)

>>> diff --git a/drivers/usb/storage/scsiglue.c
>>> b/drivers/usb/storage/scsiglue.c
>>> index a324a5d..fe42547 100644
>>> --- a/drivers/usb/storage/scsiglue.c
>>> +++ b/drivers/usb/storage/scsiglue.c
>> [...]
>>> @@ -529,6 +529,9 @@ static void adjust_quirks(struct us_data *us)
>>>    		case 'o':
>>>    			f |= US_FL_CAPACITY_OK;
>>>    			break;
>>> +		case 'p':
>>> +			f |= US_FL_WRITE_CACHE;
>>> +			break;
>>>    		case 'r':
>>>    			f |= US_FL_IGNORE_RESIDUE;
>>>    			break;
>>
>>      You probably should unite this chunk with the documentation update
>> patch.

> Hi Sergei.
> I tried to post documentation update patch(4/4) for this chunk.
> Do I misunderstand ?

    I mean that the documenation should be updated in the same patch where you 
add the new value.

WBR, Sergei
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