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Pengpeng HouandGreg Kroah-Hartman
623c4d8e74
commit17a8ce8496upstream. lpc32xx_xmit_dma() waits for the DMA completion callback but ignores wait_for_completion_timeout(). A timed out DMA transfer is therefore unmapped and reported as successful to the NAND read/write path. Return -ETIMEDOUT when the completion wait expires. Terminate the DMA channel before unmapping the scatterlist so the timed out transfer cannot continue to access the buffer after the error is returned. Fixes:2944a44da0("mtd: add LPC32xx SLC 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>