mtd: rawnand: lpc32xx_mlc: fail DMA transfers on timeout

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lpc32xx_xmit_dma() starts a DMA transfer and waits up to one second
for its completion, but it ignores the wait result and returns success
after unmapping the buffer.

A timed out read can therefore return success with incomplete data, and
a timed out write can continue the NAND operation without proof that the
DMA payload reached the controller.

Terminate the DMA channel on timeout, unmap the scatterlist through the
existing cleanup path, and return -ETIMEDOUT to the NAND read/write
callers. Initialize the shared cleanup-path result before using it for
dmaengine_prep_slave_sg() failures.

Fixes: 70f7cb78ec ("mtd: add LPC32xx MLC NAND driver")
Cc: stable@vger.kernel.org
Reviewed-by: Vladimir Zapolskiy <vz@kernel.org>
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

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Pengpeng Hou 2026-07-03 15:37:59 +08:00 • committed by Miquel Raynal

parent 9d4af746af

commit dbf590b662

1 changed files with 10 additions and 2 deletions

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drivers/mtd/nand/raw/lpc32xx_mlc.c

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