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[ Upstream commit5158814cbb] The command word is defined as following: /* Command */ #define SPI_CMD_COMMAND_SHIFT 0 #define SPI_CMD_DEVICE_ID_SHIFT 4 #define SPI_CMD_PREPEND_BYTE_CNT_SHIFT 8 #define SPI_CMD_ONE_BYTE_SHIFT 11 #define SPI_CMD_ONE_WIRE_SHIFT 12 If the prepend byte count field starts at bit 8, and the next defined bit is SPI_CMD_ONE_BYTE at bit 11, it can be at most 3 bits wide, and thus the max value is 7, not 15. Fixes:b17de07606("spi/bcm63xx: work around inability to keep CS up") Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com> Link: https://lore.kernel.org/r/20230629071453.62024-1-jonas.gorski@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>