linux-kernel - [PATCH 0/2] dmaengine: Add cleanup to simple code

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Message-Id: <20251002-dma_chan_free-v1-0-4dbf116c2b19@nxp.com>
Date: Thu, 02 Oct 2025 15:49:40 -0400
From: Frank Li <Frank.Li@....com>
To: Vinod Koul <vkoul@...nel.org>, Dong Aisheng <aisheng.dong@....com>, 
 Andi Shyti <andi.shyti@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-i2c@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, carlos.song@....com, 
 Frank Li <Frank.Li@....com>
Subject: [PATCH 0/2] dmaengine: Add cleanup to simple code

start_dma()
{
        struct dma_async_tx_descriptor *rx_cmd_desc __free(dma_async_tx_descriptor) = NULL;
        ...
        cookie = dmaengine_submit(rx_cmd_desc);
        if (dma_submit_error(cookie))
                return dma_submit_error(cookie);
        ...
        retain_and_null_ptr(rx_cmd_desc);

        return 0;
}

To: Vinod Koul <vkoul@...nel.org>
To: Dong Aisheng <aisheng.dong@....com>
To: Andi Shyti <andi.shyti@...nel.org>
To: Shawn Guo <shawnguo@...nel.org>
To: Sascha Hauer <s.hauer@...gutronix.de>
To: Pengutronix Kernel Team <kernel@...gutronix.de>
To: Fabio Estevam <festevam@...il.com>
Cc: dmaengine@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-i2c@...r.kernel.org
Cc: imx@...ts.linux.dev
Cc: linux-arm-kernel@...ts.infradead.org
Cc: carlos.song@....com

Signed-off-by: Frank Li <Frank.Li@....com>
---
Frank Li (2):
      dmaengine: Add cleanup FREE defines for dma_async_tx_descriptor
      i2c: lpi2c: Use cleanup helper for dma_async_tx_descriptor error handling

 drivers/i2c/busses/i2c-imx-lpi2c.c | 11 +++--------
 include/linux/dmaengine.h          |  4 +++-
 2 files changed, 6 insertions(+), 9 deletions(-)
---
base-commit: 019ffdd87705bcef1ca5cf9bfdd2b358ce190ab5
change-id: 20251001-dma_chan_free-0392f4004d9e

Best regards,
--
Frank Li <Frank.Li@....com>