From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jaehoon Chung <jh80.chung@samsung.com>
Subject: Re: [PATCHv5] mmc: remove MMC_CAP_ERASE to enable trim in eMMC/SD
 Device
Date: Fri, 16 Jan 2015 11:06:23 +0900
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To: Puthikorn Voravootivat <puthik@chromium.org>, Ulf Hansson <ulf.hansson@linaro.org>
Cc: linux-mmc <linux-mmc@vger.kernel.org>, Chris Ball <chris@printf.net>, Seungwon Jeon <tgih.jun@samsung.com>, Linus Walleij <linus.walleij@linaro.org>, Gwendal Grignou <gwendal@chromium.org>, Grant Grundler <grundler@chromium.org>

Hi,

On 01/16/2015 08:17 AM, Puthikorn Voravootivat wrote:
> *resend in text mode
> Hi Ulf
> 
> Is the bug regarding TRIM/ERASE/DISCARD already fixed by now?
> Can you look at this patch one more time

As i knew, it doesn't fix yet.
But thanks for reminding this. I will also check this.

Best Regards,
Jaehoon Chung

> 
> Regards,
> 
> On Mon, May 26, 2014 at 7:44 AM, Ulf Hansson <ulf.hansson@linaro.org> wrote:
>> On 26 May 2014 10:29, Jaehoon Chung <jh80.chung@samsung.com> wrote:
>>> From: Puthikorn Voravootivat <puthik@chromium.org>
>>>
>>> Remove MMC_CAP_ERASE from all host as it does not make
>>> sense that the eMMC/SD device erase feature should be
>>> controlled by the host cap. This make trim and/or discard
>>> feature usable in the supported eMMC/SD device.
>>>
>>> Signed-off-by: Puthikorn Voravootivat <puthik@chromium.org>
>>> Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
>>
>> I like the idea behind this patch.
>>
>> At same time I know we have some bugs regarding TRIM/ERASE/DISCARD
>> operations. A better approach is to solve these first.
>>
>> http://www.spinics.net/lists/linux-mmc/msg26249.html
>>
>> The are some older threads on this topic as well.
>>
>> Kind regards
>> Ulf Hansson
>