From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
To: linux-sh@vger.kernel.org
Subject: Re: [PATCH] dmaengine: rcar-dmac: Wait for IRQs completion when freeing channel
Date: Tue, 15 Sep 2015 00:11:33 +0000 [thread overview]
Message-ID: <87h9mw4kav.wl%kuninori.morimoto.gx@renesas.com> (raw)
In-Reply-To: <1442233573-26684-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com>
Hi Laurent
> When freeing channel resources we need to ensure that no IRQ will occur
> for the given channel. In order to do so the driver stops the hardware,
> but an IRQ handler could still be running, especially given that the
> channel IRQ is threaded. Fix it by waiting for pending IRQs completion
> with synchronize_irq()
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
> drivers/dma/sh/rcar-dmac.c | 37 +++++++++++++++++++------------------
> 1 file changed, 19 insertions(+), 18 deletions(-)
>
> Hi Morimoto-san,
>
> This patch is compile-tested only. Would you be able to check if it fixes the
> issue you've reported with SDHI and rcar-dmac ?
Thanks. I will ask to BSP team
next prev parent reply other threads:[~2015-09-15 0:11 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-14 12:26 [PATCH] dmaengine: rcar-dmac: Wait for IRQs completion when freeing channel Laurent Pinchart
2015-09-15 0:11 ` Kuninori Morimoto [this message]
2015-10-05 14:11 ` Vinod Koul
2015-10-08 14:22 ` Laurent Pinchart
2015-10-08 14:51 ` Lars-Peter Clausen
2015-10-14 10:47 ` Vinod Koul
2015-10-14 11:02 ` Lars-Peter Clausen
2015-10-15 3:52 ` Vinod Koul
2015-10-15 7:35 ` Lars-Peter Clausen
2015-10-15 17:04 ` Laurent Pinchart
2015-10-15 17:09 ` Laurent Pinchart
2015-10-15 17:15 ` Lars-Peter Clausen
2015-10-16 13:47 ` Lars-Peter Clausen
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