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authorColin Ian King <colin.king@canonical.com>2017-06-22 17:34:49 +0100
committerMark Brown <broonie@kernel.org>2017-06-23 12:26:38 +0100
commita2f07d38d6981ed220d86b7df07e4ac6a1734443 (patch)
tree2018ad9bac2d4fccb138c3547ee98dbaf2cec65c /drivers/spi
parentdcbe0d84dfa5a3e72b8e6ce622cd5ac78abbcab8 (diff)
spi: stm32: fix error check on mbr being -ve
The error check of mbr < 0 is always false because mbr is a u32. Make mbt an int so that a -ve error return from stm32_spi_prepare_mbr can be detected. Detected by CoverityScan, CID#1446586 ("Unsigned compared against 0") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-stm32.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 0553f61ab3b7..305ecd5334fc 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -857,7 +857,7 @@ static int stm32_spi_transfer_one_setup(struct stm32_spi *spi,
}
if (spi->cur_speed != transfer->speed_hz) {
- u32 mbr;
+ int mbr;
/* Update spi->cur_speed with real clock speed */
mbr = stm32_spi_prepare_mbr(spi, transfer->speed_hz);
@@ -869,7 +869,7 @@ static int stm32_spi_transfer_one_setup(struct stm32_spi *spi,
transfer->speed_hz = spi->cur_speed;
cfg1_clrb |= SPI_CFG1_MBR;
- cfg1_setb |= (mbr << SPI_CFG1_MBR_SHIFT) & SPI_CFG1_MBR;
+ cfg1_setb |= ((u32)mbr << SPI_CFG1_MBR_SHIFT) & SPI_CFG1_MBR;
}
if (cfg1_clrb || cfg1_setb)