Re: [PATCH 2/3] i2c: imx: release DMA channels on probe error

[Frank Li <Frank.li@oss.nxp.com>]

On Thu, Aug 27, 2026 at 11:43:02PM +0800, Shengzhuo Wei wrote:
> i2c_imx_dma_request() acquires exclusive tx/rx DMA channels and is
> optional: on errors other than -EPROBE_DEFER the driver falls back to
> PIO mode and probe continues. If i2c_add_numbered_adapter() then fails,
> probe returns through clk_notifier_unregister without releasing the
> channels, because the remove callback is not invoked after a failed
> probe.
>
> Release the channels on the probe error path, mirroring
> i2c_imx_remove().
>
> Fixes: ce1a78840ff7 ("i2c: imx: add DMA support for freescale i2c driver")
> Cc: stable@vger.kernel.org
> Signed-off-by: Shengzhuo Wei <me@cherr.cc>
> Assisted-by: GLM:5.3

Nit: signed-off-by should be last tag

Reviewed-by: Frank Li <Frank.Li@nxp.com>

> ---
>  drivers/i2c/busses/i2c-imx.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
> index 19ec056b00af..c24d9201a60e 100644
> --- a/drivers/i2c/busses/i2c-imx.c
> +++ b/drivers/i2c/busses/i2c-imx.c
> @@ -1880,6 +1880,8 @@ static int i2c_imx_probe(struct platform_device *pdev)
>
>  clk_notifier_unregister:
>  	clk_notifier_unregister(i2c_imx->clk, &i2c_imx->clk_change_nb);
> +	if (i2c_imx->dma)
> +		i2c_imx_dma_free(i2c_imx);
>  	free_irq(irq, i2c_imx);
>  rpm_disable:
>  	pm_runtime_put_noidle(&pdev->dev);
>
> --
> 2.47.3
>