linux-kernel - Re: [PATCH 2/2] mmc: rtsx: Revert "mmc: rtsx: add support for pre_req and post

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Date:	Mon, 5 May 2014 11:31:28 +0200
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Chris Ball <chris@...ntf.net>, micky <micky_ching@...lsil.com.cn>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	devel@...uxdriverproject.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	Roger <rogerable@...ltek.com>, Wei WANG <wei_wang@...lsil.com.cn>
Subject: Re: [PATCH 2/2] mmc: rtsx: Revert "mmc: rtsx: add support for pre_req
 and post_req"

On 29 April 2014 09:36, Ulf Hansson <ulf.hansson@...aro.org> wrote:
> On 29 April 2014 03:54,  <micky_ching@...lsil.com.cn> wrote:
>> From: Micky Ching <micky_ching@...lsil.com.cn>
>>
>> This reverts commit c42deffd5b53c9e583d83c7964854ede2f12410d.
>>
>> commit <mmc: rtsx: add support for pre_req and post_req> did use
>> mutex_unlock() in tasklet, but mutex_unlock() can't used in
>> tasklet(atomic context). The driver need use mutex to avoid concurrency,
>> so we can't use tasklet here, the patch need to be removed.
>>
>> The spinlock host->lock and pcr->lock may deadlock, one way to solve the
>> deadlock is remove host->lock in sd_isr_done_transfer(), but if using
>> workqueue the we can avoid using the spinlock and also avoid the problem.
>>
>> Signed-off-by: Micky Ching <micky_ching@...lsil.com.cn>
>
> Acked-by: Ulf Hansson <ulf.hansson@...aro.org>

Hi Lee,

Would you mind to pick this up and send it for 3.15 fixes?

The other revert "[PATCH 1/2] mmc: rtsx: Revert "mmc: rtsx: modify
error handle and remove smatch warnings", needs to go through the mmc
tree.

Kind regards
Uffe
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