Re: [PATCH] spi: armada-3700: fix unsigned compare than zero on irq

From: Romain Perier
Date: Tue Dec 13 2016 - 05:55:41 EST


Hello,

Le 13/12/2016 Ã 11:28, Colin King a Ãcrit :
From: Colin Ian King <colin.king@xxxxxxxxxxxxx>

spi->irq is an unsigned integer hence the check if status is less than
zero has no effect. Fix this by replacing spi->irq with an int irq
so the less than zero compare will correctly detect errors.

Issue found with static analysis with CoverityScan, CID1388567

Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
drivers/spi/spi-armada-3700.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-armada-3700.c b/drivers/spi/spi-armada-3700.c
index e89da0a..4e92178 100644
--- a/drivers/spi/spi-armada-3700.c
+++ b/drivers/spi/spi-armada-3700.c
@@ -800,7 +800,7 @@ static int a3700_spi_probe(struct platform_device *pdev)
struct spi_master *master;
struct a3700_spi *spi;
u32 num_cs = 0;
- int ret = 0;
+ int irq, ret = 0;

master = spi_alloc_master(dev, sizeof(*spi));
if (!master) {
@@ -846,12 +846,13 @@ static int a3700_spi_probe(struct platform_device *pdev)
goto error;
}

- spi->irq = platform_get_irq(pdev, 0);
- if (spi->irq < 0) {
- dev_err(dev, "could not get irq: %d\n", spi->irq);
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(dev, "could not get irq: %d\n", irq);
ret = -ENXIO;
goto error;
}
+ spi->irq = irq;

init_completion(&spi->done);



Why don't you change only the type of "irq" in struct a3700_spi ?

Thanks,
Romain