linux-kernel - Re: [PATCH] mmc: Do not advertise secure discard if it is blacklisted

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Date:	Tue, 15 Jul 2014 07:48:29 +0900
From:	Jaehoon Chung <jh80.chung@...sung.com>
To:	Lukáš Czerner <lczerner@...hat.com>,
	linux-mmc@...r.kernel.org
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	chris@...ntf.net, Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [PATCH] mmc: Do not advertise secure discard if it is blacklisted

Hi, Lukas.

I think it's reasonable. And CC'd Ulf.

Acked-by: Jaehoon Chung <jh80.chung@...sung.com>

Best Regards,
Jaehoon Chung

On 07/14/2014 05:10 PM, Lukáš Czerner wrote:
> On Wed, 18 Jun 2014, Lukas Czerner wrote:
> 
>> Date: Wed, 18 Jun 2014 13:18:07 +0200
>> From: Lukas Czerner <lczerner@...hat.com>
>> To: linux-mmc@...r.kernel.org
>> Cc: linux-fsdevel@...r.kernel.org, chris@...ntf.net,
>>     Lukas Czerner <lczerner@...hat.com>
>> Subject: [PATCH] mmc: Do not advertise secure discard if it is blacklisted
>>
>> Currently when the device secure discard implementation is
>> blacklisted (MMC_QUIRK_SEC_ERASE_TRIM_BROKEN quirk is set)
>> instead of secure discard we're going to do normal discard,
>> which is wrong.
>>
>> When the secure discard is known to be broken we should just
>> disallow it entirely and not advertise this functionality to
>> the user. Fix it.
>>
>> Also move mmc_fixup_device() in from of mmc_blk_alloc() so we
>> can get quirks set before we attempt to set queue information.
> 
> Where should I send it to get noticed ? It's sitting here for a
> month now.
> 
> Thanks!
> -Lukas
> 
>>
>> Signed-off-by: Lukas Czerner <lczerner@...hat.com>
>> ---
>>  drivers/mmc/card/block.c | 6 +++---
>>  drivers/mmc/core/core.c  | 3 ++-
>>  2 files changed, 5 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
>> index 452782b..ede41f0 100644
>> --- a/drivers/mmc/card/block.c
>> +++ b/drivers/mmc/card/block.c
>> @@ -2028,8 +2028,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
>>  		/* complete ongoing async transfer before issuing discard */
>>  		if (card->host->areq)
>>  			mmc_blk_issue_rw_rq(mq, NULL);
>> -		if (req->cmd_flags & REQ_SECURE &&
>> -			!(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN))
>> +		if (req->cmd_flags & REQ_SECURE)
>>  			ret = mmc_blk_issue_secdiscard_rq(mq, req);
>>  		else
>>  			ret = mmc_blk_issue_discard_rq(mq, req);
>> @@ -2432,6 +2431,8 @@ static int mmc_blk_probe(struct mmc_card *card)
>>  	if (!(card->csd.cmdclass & CCC_BLOCK_READ))
>>  		return -ENODEV;
>>  
>> +	mmc_fixup_device(card, blk_fixups);
>> +
>>  	md = mmc_blk_alloc(card);
>>  	if (IS_ERR(md))
>>  		return PTR_ERR(md);
>> @@ -2446,7 +2447,6 @@ static int mmc_blk_probe(struct mmc_card *card)
>>  		goto out;
>>  
>>  	mmc_set_drvdata(card, md);
>> -	mmc_fixup_device(card, blk_fixups);
>>  
>>  	if (mmc_add_disk(md))
>>  		goto out;
>> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
>> index 7dc0c85..d03a080 100644
>> --- a/drivers/mmc/core/core.c
>> +++ b/drivers/mmc/core/core.c
>> @@ -2102,7 +2102,8 @@ EXPORT_SYMBOL(mmc_can_sanitize);
>>  
>>  int mmc_can_secure_erase_trim(struct mmc_card *card)
>>  {
>> -	if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)
>> +	if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) &&
>> +	    !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN))
>>  		return 1;
>>  	return 0;
>>  }
>>
> --
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