X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=lib%2Faix-device.c;h=93a8e4e72f6607d4f9504eae127d05a54cbbaecf;hb=d1058e9dee26b0ae0f8a595e07bfdee20a5fecef;hp=55b2f306dd80ae0a0d492d0bed2fb37449b856c1;hpb=6dd65238a1b203b76dee8cbe09d208b450b0f68c;p=pciutils.git

diff --git a/lib/aix-device.c b/lib/aix-device.c
index 55b2f30..93a8e4e 100644
--- a/lib/aix-device.c
+++ b/lib/aix-device.c
@@ -222,8 +222,12 @@ static int
 aix_read(struct pci_dev *d, int pos, byte *buf, int len)
 {
   struct mdio mdio;
-  int fd = aix_bus_open(d->access, d->bus);
+  int fd;
 
+  if (pos + len > 256)
+    return 0;
+
+  fd = aix_bus_open(d->access, d->bus);
   mdio.md_addr = (ulong) pos;
   mdio.md_size = len;
   mdio.md_incr = MV_BYTE;
@@ -240,8 +244,12 @@ static int
 aix_write(struct pci_dev *d, int pos, byte *buf, int len)
 {
   struct mdio mdio;
-  int fd = aix_bus_open(d->access, d->bus);
+  int fd;
+
+  if (pos + len > 256)
+    return 0;
 
+  fd = aix_bus_open(d->access, d->bus);
   mdio.md_addr = (ulong) pos;
   mdio.md_size = len;
   mdio.md_incr = MV_BYTE;