pcmcia: allow for extension of resource interval

If a new interval overlaps or extends an existing interval in
add_interval(), do not fail, but extend the existing interval.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
index 19cecb5..a06881c 100644 (file)
--- a/drivers/pcmcia/rsrc_nonstatic.c
+++ b/drivers/pcmcia/rsrc_nonstatic.c
@@ -124,8 +124,10 @@ static int add_interval(struct resource_map *map, u_long base, u_long num)
        struct resource_map *p, *q;
 
        for (p = map; ; p = p->next) {
-               if ((p != map) && (p->base+p->num-1 >= base))
-                       return -1;
+               if ((p != map) && (p->base+p->num >= base)) {
+                       p->num = max(num + base - p->base, p->num);
+                       return 0;
+               }
                if ((p->next == map) || (p->next->base > base+num-1))
                        break;
        }