Re: [PATCH] mmc: mediatek: replace spin_lock_irqsave by spin_lock in hard IRQ

From: Ulf Hansson <ulf.hansson@linaro.org>
To: Tian Tao <tiantao6@hisilicon.com>
Cc: haotian.jing@mediatek.com,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.or>,
	"moderated list:ARM/Mediatek SoC support" 
	<linux-mediatek@lists.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mmc: mediatek: replace spin_lock_irqsave by spin_lock in hard IRQ
Date: Thu, 29 Oct 2020 13:08:33 +0100	[thread overview]
Message-ID: <CAPDyKFpyASJCE8QtKX=R=eVeeT2=adknBZmWo8GVaaLDv8KAXw@mail.gmail.com> (raw)
In-Reply-To: <1603068193-44688-1-git-send-email-tiantao6@hisilicon.com>

On Mon, 19 Oct 2020 at 02:42, Tian Tao <tiantao6@hisilicon.com> wrote:
>
> The code has been in a irq-disabled context since it is hard IRQ. There
> is no necessity to do it again.
>
> Signed-off-by: Tian Tao <tiantao6@hisilicon.com>

Applied for next, thanks!

Kind regards
Uffe

> ---
>  drivers/mmc/host/mtk-sd.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
> index a704745..fb3e419 100644
> --- a/drivers/mmc/host/mtk-sd.c
> +++ b/drivers/mmc/host/mtk-sd.c
> @@ -1536,13 +1536,12 @@ static irqreturn_t msdc_irq(int irq, void *dev_id)
>         struct mmc_host *mmc = mmc_from_priv(host);
>
>         while (true) {
> -               unsigned long flags;
>                 struct mmc_request *mrq;
>                 struct mmc_command *cmd;
>                 struct mmc_data *data;
>                 u32 events, event_mask;
>
> -               spin_lock_irqsave(&host->lock, flags);
> +               spin_lock(&host->lock);
>                 events = readl(host->base + MSDC_INT);
>                 event_mask = readl(host->base + MSDC_INTEN);
>                 if ((events & event_mask) & MSDC_INT_SDIOIRQ)
> @@ -1553,7 +1552,7 @@ static irqreturn_t msdc_irq(int irq, void *dev_id)
>                 mrq = host->mrq;
>                 cmd = host->cmd;
>                 data = host->data;
> -               spin_unlock_irqrestore(&host->lock, flags);
> +               spin_unlock(&host->lock);
>
>                 if ((events & event_mask) & MSDC_INT_SDIOIRQ)
>                         sdio_signal_irq(mmc);
> --
> 2.7.4
>