Re: [PATCH v1 04/10] bus: mhi: core: Use the IRQF_ONESHOT flag for the BHI interrupt line

[Manivannan Sadhasivam]

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@xxxxxxxxxxxxxx>
> ---
>  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;
> -- 
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