On 15 September 2015 at 12:32, Haibo Chen <haibo.chen@xxxxxxxxxxxxx> wrote:
> sdhci_init() will clear all irqs and set the needed irqs. So
> logically sdhci_init() should be called before request irq.
>
> If not, some irqs may be triggled and handled wrongly. Take
> the following into consideration, after request irq, if
> SDIO card interrupt enabled, a sd card in the sd slot will
> trigger a mass of interrupt(SDHCI_INT_CARD_INT), because at
> this time, the vmmc-regulator still not restore, no voltage
> supply for the sd card, so the pin of data0~data3 change and
> keep low, interrupt(SDHCI_INT_CARD_INT) will rise up ceaselessly.
> Due to we already reguest irq, system will be busy in handling
> this endless irq, can't response to other event.
>
> So we should call sdhci_init() before request irq in sd resume.
>
> Signed-off-by: Haibo Chen <haibo.chen@xxxxxxxxxxxxx>
Thanks, applied for next!
Kind regards
Uffe
> ---
> drivers/mmc/host/sdhci.c | 22 +++++++++++-----------
> 1 file changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 64b7fdb..6861573 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -2714,17 +2714,6 @@ int sdhci_resume_host(struct sdhci_host *host)
> host->ops->enable_dma(host);
> }
>
> - if (!device_may_wakeup(mmc_dev(host->mmc))) {
> - ret = request_threaded_irq(host->irq, sdhci_irq,
> - sdhci_thread_irq, IRQF_SHARED,
> - mmc_hostname(host->mmc), host);
> - if (ret)
> - return ret;
> - } else {
> - sdhci_disable_irq_wakeups(host);
> - disable_irq_wake(host->irq);
> - }
> -
> if ((host->mmc->pm_flags & MMC_PM_KEEP_POWER) &&
> (host->quirks2 & SDHCI_QUIRK2_HOST_OFF_CARD_ON)) {
> /* Card keeps power but host controller does not */
> @@ -2737,6 +2726,17 @@ int sdhci_resume_host(struct sdhci_host *host)
> mmiowb();
> }
>
> + if (!device_may_wakeup(mmc_dev(host->mmc))) {
> + ret = request_threaded_irq(host->irq, sdhci_irq,
> + sdhci_thread_irq, IRQF_SHARED,
> + mmc_hostname(host->mmc), host);
> + if (ret)
> + return ret;
> + } else {
> + sdhci_disable_irq_wakeups(host);
> + disable_irq_wake(host->irq);
> + }
> +
> sdhci_enable_card_detection(host);
>
> return ret;
> --
> 1.9.1
>
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