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of_get_nand_bus_width() had a wrong behavior because:
1/ it ignored the -ENODATA and -EOVERFLOW return values of
of_property_read_u32(). "nand-bus-width" without value was tolerated
while it shouldn't have been according to the devicetree bindings.
2/ returned -EIO when the nand-bus-width was neither 8 nor 16, when it
should have returned -EINVAL instead.
3/ returned the 8 or 16 bus-width integer, but it was never used it its
caller. A simply return 0 on success is enough.
Rework of_get_nand_bus_width() and address all the above. The execution
is now stopped in case of errors.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220106131610.225661-2-tudor.ambarus@microchip.com
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