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9e048af2c3
imx9_dmapreflight() rejected unaligned buffers unconditionally, but dmarecvsetup() has a bounce path via priv->rxbuffer for small transfers. Add a buflen > sizeof(priv->rxbuffer) check so that small reads (e.g. ext_csd 512-byte stack buffer) can use the bounce buffer instead of failing with -EFAULT. Signed-off-by: buxiasen <buxiasen@xiaomi.com>