Kludge around linux bug and turn off write-through and cache-disable bits

[platform/upstream/libpciaccess.git] / src / linux_sysfs.c

diff --git a/src/linux_sysfs.c b/src/linux_sysfs.c
index 873dc02..78584d6 100644 (file)
--- a/src/linux_sysfs.c
+++ b/src/linux_sysfs.c
@@ -558,6 +558,9 @@ pci_device_linux_sysfs_map_range(struct pci_device *dev,
                    strerror(errno), errno);
 /*            err = errno;*/
        }
+       /* KLUDGE ALERT -- rewrite the PTEs to turn off the CD and WT bits */
+       mprotect (map->memory, map->size, PROT_NONE);
+       mprotect (map->memory, map->size, PROT_READ|PROT_WRITE);
     }
 #endif