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authorColin Ian King <colin.king@canonical.com>2019-11-22 13:13:54 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-01-12 11:22:43 +0100
commite3e3f4e6398957b80b55ebe7aabd4caeef3bd38f (patch)
treef81b04e33eb4de1656322d0996f523362633021b /sound/isa
parent2970aa22adba39191929607b8e4aee332f01af59 (diff)
ALSA: cs4236: fix error return comparison of an unsigned integer
commit d60229d84846a8399257006af9c5444599f64361 upstream. 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> Link: https://lore.kernel.org/r/20191122131354.58042-1-colin.king@canonical.com Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/isa')
-rw-r--r--sound/isa/cs423x/cs4236.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/isa/cs423x/cs4236.c b/sound/isa/cs423x/cs4236.c
index 9d7582c90a95..c67d379cb6d6 100644
--- a/sound/isa/cs423x/cs4236.c
+++ b/sound/isa/cs423x/cs4236.c
@@ -293,7 +293,8 @@ 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 */