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Date:   Fri, 9 Oct 2020 21:27:06 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To:     Bhaumik Bhatt <bbhatt@codeaurora.org>
Cc:     linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
        jhugo@codeaurora.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 04/10] bus: mhi: core: Use the IRQF_ONESHOT flag for
 the BHI interrupt line
Message-ID: <20201009155706.GE4810@Mani-XPS-13-9360>
References: <1600480955-16827-1-git-send-email-bbhatt@codeaurora.org>
 <1600480955-16827-5-git-send-email-bbhatt@codeaurora.org>
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On Fri, Sep 18, 2020 at 07:02:29PM -0700, Bhaumik Bhatt wrote:
> Remove the IRQF_SHARED flag as it is not needed for the BHI interrupt
> and replace it with IRQF_ONESHOT so that host can be sure that the
> next BHI hard interrupt is triggered only when the threaded interrupt
> handler has returned. This is to avoid any race conditions we may run
> into if BHI interrupts fire one after another.
> 
> Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> ---
>  drivers/bus/mhi/core/init.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
> index ca32563..9ae4c19 100644
> --- a/drivers/bus/mhi/core/init.c
> +++ b/drivers/bus/mhi/core/init.c
> @@ -167,7 +167,7 @@ int mhi_init_irq_setup(struct mhi_controller *mhi_cntrl)
>  	/* Setup BHI_INTVEC IRQ */
>  	ret = request_threaded_irq(mhi_cntrl->irq[0], mhi_intvec_handler,
>  				   mhi_intvec_threaded_handler,
> -				   IRQF_SHARED | IRQF_NO_SUSPEND,
> +				   IRQF_ONESHOT | IRQF_NO_SUSPEND,

Jeff, I believe you're the one requested for shared irq during initial push.
Are you okay with this?

Thanks,
Mani

>  				   "bhi", mhi_cntrl);
>  	if (ret)
>  		return ret;
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>