linux-kernel - Re: [PATCH v2 01/11] mmc: core: Add helper function to indicate if SDIO IRQs is enabled

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Date:   Mon, 9 Sep 2019 15:32:30 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Linux MMC List <linux-mmc@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Matthias Kaehlcke <mka@...omium.org>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Yong Mao <yong.mao@...iatek.com>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 01/11] mmc: core: Add helper function to indicate if
 SDIO IRQs is enabled

Hi,

On Sun, Sep 8, 2019 at 3:12 AM Ulf Hansson <ulf.hansson@...aro.org> wrote:
>
> To avoid each host driver supporting SDIO IRQs, from keeping track
> internally about if SDIO IRQs has been claimed, let's introduce a common
> helper function, sdio_irq_claimed().
>
> The function returns true if SDIO IRQs are claimed, via using the
> information about the number of claimed irqs. This is safe, even without
> any locks, as long as the helper function is called only from
> runtime/system suspend callbacks of the host driver.
>
> Tested-by: Matthias Kaehlcke <mka@...omium.org>
> Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
> ---
>
> Changes in v2:
>         - Renamed function to sdio_irq_claimed().
>
> ---
>  include/linux/mmc/host.h | 9 +++++++++
>  1 file changed, 9 insertions(+)

Reviewed-by: Douglas Anderson <dianders@...omium.org>