spi: cadence-quadspi: Silence shiftTooManyBitsSigned warning

drivers/spi/spi-cadence-quadspi.c:267:18: warning: Shifting signed 32-bit
value by 31 bits is undefined behaviour [shiftTooManyBitsSigned]
    return reg & (1 << CQSPI_REG_CONFIG_IDLE_LSB);
                    ^

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jay Fang <f.fangjian@huawei.com>
Link: https://lore.kernel.org/r/1614854872-8694-1-git-send-email-f.fangjian@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 14a7120..e2d6ea8 100644 (file)
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -264,7 +264,7 @@ static bool cqspi_is_idle(struct cqspi_st *cqspi)
 {
        u32 reg = readl(cqspi->iobase + CQSPI_REG_CONFIG);
 
-       return reg & (1 << CQSPI_REG_CONFIG_IDLE_LSB);
+       return reg & (1UL << CQSPI_REG_CONFIG_IDLE_LSB);
 }
 
 static u32 cqspi_get_rd_sram_level(struct cqspi_st *cqspi)