linux-kernel - Re: [PATCH] dmaengine: qcom_hidma: check pending interrupts

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Date:   Wed, 29 Nov 2017 19:31:18 +0530
From:   Vinod Koul <vinod.koul@...el.com>
To:     Sinan Kaya <okaya@...eaurora.org>
Cc:     dmaengine@...r.kernel.org, timur@...eaurora.org,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dmaengine: qcom_hidma: check pending interrupts

On Tue, Nov 14, 2017 at 09:55:01AM -0500, Sinan Kaya wrote:
> Driver is missing the interrupts if two requests are queued up at the same
> time as the interrupt handler is servicing a request that was just
> delivered.
> 
> The ISR clears the interrupt at the end but it could be clearing the
> interrupt for an outstanding event. Therefore, second interrupt never
> arrives.
> 
> Clear the interrupt first and then check for completions.
> 
> Also, make sure that request start and interrupt clear do not overlap in
> time by using a spinlock.

Applied, thanks

-- 
~Vinod