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From: Fabio Estevam <festevam@gmail.com>
To: Philipp Puschmann <philipp.puschmann@emlix.com>
Cc: Fugang Duan <fugang.duan@nxp.com>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Vinod <vkoul@kernel.org>, NXP Linux Team <linux-imx@nxp.com>,
	Sascha Hauer <kernel@pengutronix.de>,
	Dan Williams <dan.j.williams@intel.com>,
	Robin Gong <yibin.gong@nxp.com>, Shawn Guo <shawnguo@kernel.org>,
	dmaengine@vger.kernel.or,
	"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
	<linux-arm-kernel@lists.infradead.org>,
	Lucas Stach <l.stach@pengutronix.de>
Subject: Re: [PATCH v3 1/3] dmaengine: imx-sdma: fix buffer ownership
Date: Thu, 19 Sep 2019 08:37:50 -0300
Message-ID: <CAOMZO5BNvejzMxhZiaJ36E5XES=uVNn_G-+fXQfStzy5W+YbsA@mail.gmail.com> (raw)
In-Reply-To: <20190919104526.29851-2-philipp.puschmann@emlix.com>

Hi Philipp,

On Thu, Sep 19, 2019 at 7:45 AM Philipp Puschmann
<philipp.puschmann@emlix.com> wrote:
>
> BD_DONE flag marks ownership of the buffer. When 1 SDMA owns the
> buffer, when 0 ARM owns it. When processing the buffers in
> sdma_update_channel_loop the ownership of the currently processed
> buffer was set to SDMA again before running the callback function of
> the buffer and while the sdma script may be running in parallel. So
> there was the possibility to get the buffer overwritten by SDMA before
> it has been processed by kernel leading to kind of random errors in the
> upper layers, e.g. bluetooth.
>
> Fixes: broken since start

The Fixes tag requires a commit ID like this:

Fixes: 1ec1e82f2510 ("dmaengine: Add Freescale i.MX SDMA support")

Same applies to the other patch.

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  reply index

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-11 14:49 [PATCH 0/4] Fix UART DMA freezes for iMX6 Philipp Puschmann
2019-09-11 14:49 ` [PATCH 1/4] dmaengine: imx-sdma: fix buffer ownership Philipp Puschmann
2019-09-16 14:17   ` Lucas Stach
2019-09-19  9:20     ` Philipp Puschmann
2019-09-11 14:49 ` [PATCH 2/4] dmaengine: imx-sdma: fix dma freezes Philipp Puschmann
2019-09-16 14:22   ` Lucas Stach
2019-09-11 14:49 ` [PATCH 3/4] serial: imx: adapt rx buffer and dma periods Philipp Puschmann
2019-09-16 14:24   ` Lucas Stach
2019-09-11 14:49 ` [PATCH 4/4] dmaengine: imx-sdma: drop redundant variable Philipp Puschmann
2019-09-16 14:30   ` Lucas Stach
2019-09-12 15:31 ` [PATCH 0/4] Fix UART DMA freezes for iMX6 Fabio Estevam
2019-09-12 18:23 ` Fabio Estevam
2019-09-16 13:55   ` Philipp Puschmann
2019-09-16 14:00     ` Fabio Estevam
2019-09-16 14:10     ` [EXT] " Andy Duan
2019-09-16  8:02 ` Robin Gong
2019-09-16 13:41   ` Philipp Puschmann
2019-09-19 10:23 ` [PATCH v2 0/3] Fix UART DMA freezes for i.MX SOCs Philipp Puschmann
2019-09-19 10:23   ` [PATCH v2 1/3] dmaengine: imx-sdma: fix buffer ownership Philipp Puschmann
2019-09-19 10:27     ` Lucas Stach
2019-09-19 10:34       ` Philipp Puschmann
2019-09-19 10:23   ` [PATCH v2 2/3] dmaengine: imx-sdma: fix dma freezes Philipp Puschmann
2019-09-19 10:23   ` [PATCH v2 3/3] dmaengine: imx-sdma: drop redundant variable Philipp Puschmann
2019-09-19 10:33   ` [PATCH v2 0/3] Fix UART DMA freezes for i.MX SOCs Fabio Estevam
2019-09-19 10:45   ` [PATCH v3 " Philipp Puschmann
2019-09-19 10:45     ` [PATCH v3 1/3] dmaengine: imx-sdma: fix buffer ownership Philipp Puschmann
2019-09-19 11:37       ` Fabio Estevam [this message]
2019-09-19 11:42         ` Philipp Puschmann
2019-09-19 10:45     ` [PATCH v3 2/3] dmaengine: imx-sdma: fix dma freezes Philipp Puschmann
2019-09-19 10:45     ` [PATCH v3 3/3] dmaengine: imx-sdma: drop redundant variable Philipp Puschmann

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