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SubjectRe: One bug of SDHCI driver

Hi,

Any comments for this new patch?

Thanks,
Zhonghui
On 2014/7/20 22:51, Fu, Zhonghui wrote:
> Hi,
>
> Chris' patch is not enough to fix this bug. I made a patch as follows and verified it can work. Could you please give out some comments about this patch?
>
>
> Thanks,
> Zhonghui
>
> From 72d6f5b56fa04290fd3a055a3333de1d89e7c8d4 Mon Sep 17 00:00:00 2001
> From: Fu Zhonghui <zhonghui.fu@linux.intel.com>
> Date: Sun, 20 Jul 2014 22:29:53 +0800
> Subject: [PATCH] mmc: core: sdio: Fix unconditional wake_up_process() on sdio thread
>
> 781e989cf59 ("mmc: sdhci: convert to new SDIO IRQ handling") and
> bf3b5ec66bd ("mmc: sdio_irq: rework sdio irq handling") disabled
> the use of our own custom threaded IRQ handler, but left in an
> unconditional wake_up_process() on that handler at resume-time.
>
> Signed-off-by: Fu Zhonghui <zhonghui.fu@linux.intel.com>
> ---
> drivers/mmc/core/sdio.c | 14 ++++++++++++--
> 1 files changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
> index e636d9e..8369e56 100644
> --- a/drivers/mmc/core/sdio.c
> +++ b/drivers/mmc/core/sdio.c
> @@ -992,8 +992,18 @@ static int mmc_sdio_resume(struct mmc_host *host)
> }
> }
>
> - if (!err && host->sdio_irqs)
> - wake_up_process(host->sdio_irq_thread);
> + if (!err && host->sdio_irqs) {
> + if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) {
> + wake_up_process(host->sdio_irq_thread);
> + } else {
> + mmc_release_host(host);
> + mmc_host_clk_hold(host);
> + host->ops->enable_sdio_irq(host, 1);
> + mmc_host_clk_release(host);
> + mmc_claim_host(host);
> + }
> + }
> +
> mmc_release_host(host);
>
> host->pm_flags &= ~MMC_PM_KEEP_POWER;
> -- 1.7.1
>
>
>
> On 2014/7/15 12:40, Jaehoon Chung wrote:
>> From: Chris Ball <chris@printf.net>
>> Subject: [PATCH] mmc: core: sdio: Fix unconditional wake_up_process() on sdio thread
>>
>> 781e989cf59 ("mmc: sdhci: convert to new SDIO IRQ handling") and
>> bf3b5ec66bd ("mmc: sdio_irq: rework sdio irq handling") disabled
>> the use of our own custom threaded IRQ handler, but left in an
>> unconditional wake_up_process() on that handler at resume-time.
>>
>> Reported-by: Fu, Zhonghui <zhonghui.fu@linux.intel.com>
>> [Patch suggested by Jaehoon Chung]
>> Signed-off-by: Chris Ball <chris@printf.net>
>> ---
>> drivers/mmc/core/sdio.c | 3 ++-
>> 1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
>> index e636d9e..11cc4e0 100644
>> --- a/drivers/mmc/core/sdio.c
>> +++ b/drivers/mmc/core/sdio.c
>> @@ -992,7 +992,8 @@ static int mmc_sdio_resume(struct mmc_host *host)
>> }
>> }
>>
>> - if (!err && host->sdio_irqs)
>> + if (!err && host->sdio_irqs &&
>> + !(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD))
>> wake_up_process(host->sdio_irq_thread);
>> mmc_release_host(host);
>>
> --
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