[PATCH] misc/pca9554: Fix check of pin range value in property accessors

["Cédric Le Goater" <clg@redhat.com>]

Coverity detected an "Integer handling" issue with the pin value :

  In expression "state >> pin", right shifting "state" by more than 7
  bits always yields zero.  The shift amount, "pin", is as much as 8.

In practice, this should not happen because the properties "pin8" and
above are not created. Nevertheless, fix the range to avoid this warning.

Fixes: CID 1534917
Fixes: de0c7d543bca ("misc: Add a pca9554 GPIO device model")
Cc: Glenn Miles <milesg@linux.vnet.ibm.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 hw/misc/pca9554.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/misc/pca9554.c b/hw/misc/pca9554.c
index 778b32e4430a8b618322c26b1b185ed3ead97cc4..5e31696797d9564666ece6fe17737ee2a9733e96 100644
--- a/hw/misc/pca9554.c
+++ b/hw/misc/pca9554.c
@@ -160,7 +160,7 @@ static void pca9554_get_pin(Object *obj, Visitor *v, const char *name,
         error_setg(errp, "%s: error reading %s", __func__, name);
         return;
     }
-    if (pin < 0 || pin > PCA9554_PIN_COUNT) {
+    if (pin < 0 || pin >= PCA9554_PIN_COUNT) {
         error_setg(errp, "%s invalid pin %s", __func__, name);
         return;
     }
@@ -187,7 +187,7 @@ static void pca9554_set_pin(Object *obj, Visitor *v, const char *name,
         error_setg(errp, "%s: error reading %s", __func__, name);
         return;
     }
-    if (pin < 0 || pin > PCA9554_PIN_COUNT) {
+    if (pin < 0 || pin >= PCA9554_PIN_COUNT) {
         error_setg(errp, "%s invalid pin %s", __func__, name);
         return;
     }
-- 
2.44.0