From: Colin Ian King colin.king@canonical.com

The return from pnp_irq is an unsigned integer type resource_size_t and hence the error check for a positive non-error code is always going to be true. A check for a non-failure return from pnp_irq should in fact be for (resource_size_t)-1 rather than >= 0.

Addresses-Coverity: ("Unsigned compared against 0") Fixes: a9824c868a2c ("[ALSA] Add CS4232 PnP BIOS support") Signed-off-by: Colin Ian King colin.king@canonical.com --- sound/isa/cs423x/cs4236.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/isa/cs423x/cs4236.c b/sound/isa/cs423x/cs4236.c index 78dd213589b4..fa3c39cff5f8 100644 --- a/sound/isa/cs423x/cs4236.c +++ b/sound/isa/cs423x/cs4236.c @@ -278,7 +278,8 @@ static int snd_cs423x_pnp_init_mpu(int dev, struct pnp_dev *pdev) } else { mpu_port[dev] = pnp_port_start(pdev, 0); if (mpu_irq[dev] >= 0 && - pnp_irq_valid(pdev, 0) && pnp_irq(pdev, 0) >= 0) { + pnp_irq_valid(pdev, 0) && + pnp_irq(pdev, 0) != (resource_size_t)-1) { mpu_irq[dev] = pnp_irq(pdev, 0); } else { mpu_irq[dev] = -1; /* disable interrupt */