i2c: imx: release DMA channels on probe error

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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: ce1a78840f ("i2c: imx: add DMA support for freescale i2c driver")
Assisted-by: GLM:5.3
Signed-off-by: Shengzhuo Wei <me@cherr.cc>
Cc: <stable@vger.kernel.org> # v3.19+
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://patch.msgid.link/20260827-i2c-dma-channel-leak-v1-2-271d4adc03a0@cherr.cc

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Shengzhuo Wei 2026-08-27 23:43:02 +08:00 • committed by Andi Shyti

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commit e9f03b9625

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drivers/i2c/busses/i2c-imx.c

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