From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Currently the return from pnp_port_start is being checked for validity
by checking if it is greater or equal to zero, however, the return
is unsigned and hence this check is always true. An 0 return from
pnp_port_start is actually an error, so fix the check by checking
for validity when it is non-zero.
Detected by CoverityScan, CID#1468334 ("Unsigned compared to 0")
Fixes: a9824c868a2c ("[ALSA] Add CS4232 PnP BIOS support")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
sound/isa/cs423x/cs4236.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/isa/cs423x/cs4236.c b/sound/isa/cs423x/cs4236.c
index 70559e59d18f..2211c39d2c18 100644
--- a/sound/isa/cs423x/cs4236.c
+++ b/sound/isa/cs423x/cs4236.c
@@ -292,7 +292,7 @@ static int snd_cs423x_pnp_init_mpu(int dev, struct pnp_dev *pdev)
mpu_irq[dev] = SNDRV_AUTO_IRQ;
} else {
mpu_port[dev] = pnp_port_start(pdev, 0);
- if (mpu_irq[dev] >= 0 &&
+ if (!mpu_irq[dev] &&
pnp_irq_valid(pdev, 0) && pnp_irq(pdev, 0) >= 0) {
mpu_irq[dev] = pnp_irq(pdev, 0);
} else {
--
2.17.1
