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

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Message-ID: <CAPDyKFp-xgTR6KOSBDUpju-Q5ea-8ncHwdLigMZrAuKTsrQfDg@mail.gmail.com>
Date:	Sat, 26 Jul 2014 11:17:17 +0200
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Jaehoon Chung <jh80.chung@...sung.com>,
	Lukáš Czerner <lczerner@...hat.com>
Cc:	linux-mmc <linux-mmc@...r.kernel.org>,
	linux-fsdevel@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Chris Ball <chris@...ntf.net>
Subject: Re: [PATCH] mmc: Do not advertise secure discard if it is blacklisted

On 15 July 2014 00:48, Jaehoon Chung <jh80.chung@...sung.com> wrote:
> 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>

Sorry for the delay.

Thanks, applied for next!

Kind regards
Uffe

>>> ---
>>>  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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