Yes, "mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;" of "sdhci_add_host" function in host/sdhci.c file make oops.
"sdio_card_irq_get" function in core/sdio_irq.c file:
if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) { /* the condition is false */
atomic_set(&host->sdio_irq_thread_abort, 0);
host->sdio_irq_thread =
kthread_run(sdio_irq_thread, host,
"ksdioirqd/%s", mmc_hostname(host));
This will make "host->sdio_irq_thread" a NULL pointer in "mmc_sdio_resume" functon of core/sdio.c file.
Thanks,
Zhonghui
On 2014/7/4 10:40, Jaehoon Chung wrote:
> 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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