[PATCH] spi: cadence-quadspi: Silence shiftTooManyBitsSigned warning

[Jay Fang <f.fangjian@xxxxxxxxxx>]

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@xxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Jay Fang <f.fangjian@xxxxxxxxxx>
---
 drivers/spi/spi-cadence-quadspi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 442cc7c..9a2798a5 100644
--- 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)
-- 
2.7.4