linux-kernel - Re: One bug of SDHCI driver

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Date:	Fri, 04 Jul 2014 11:40:03 +0900
From:	Jaehoon Chung <jh80.chung@...sung.com>
To:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>, chris@...ntf.net,
	ulf.hansson@...aro.org, tgih.jun@...sung.com, aaron.lu@...el.com,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	jackey.shen@....com, gregkh@...uxfoundation.org
Subject: Re: One bug of SDHCI driver

Hi,

just use the MMC_CAP2_SDIO_IRQ_NOTHREAD?

if (!err && host->sdio_irq && !(host->quirks & MMC_CAP2_SDIO_IRQ_NOTHREAD))
	wake_up_process(host->sdio_irq_thread);

I didn't test this..but i believe that it will be fixed.

Best Regards,
Jaehoon Chung

On 07/04/2014 12:47 AM, Fu, Zhonghui wrote:
> 
> Hi, all
> 
> The statement "mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;" is added in "sdhci_add_host" function in host/sdhci.c file. In some cases, this will make  "host->sdio_irq_thread" a NULL pointer in "mmc_sdio_resume" functon of core/sdio.c file and lead to resume failure. Could you please give me some advice how to fix this bug?
> 
> 
> 
> Thanks,
> Zhonghui
> 
> 
> 
> 
> 
> 

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