[PCMCIA] Fix bug in PCMCIA resource management memory probing

This prevents us from probing past the memory areas which cardmgr
passes us, and also allows us to correctly remove areas which we
decide are not available for PCMCIA use.

drivers/pcmcia/rsrc_mgr.c

@@ -491,7 +491,7 @@ static u_long inv_probe(resource_map_t *m, struct pcmcia_socket *s)
 
 void validate_mem(struct pcmcia_socket *s)
 {
-    resource_map_t *m, *n;
+    resource_map_t *m, mm;
     static u_char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 };
     static int hi = 0, lo = 0;
     u_long b, i, ok = 0;
@@ -510,18 +510,18 @@ void validate_mem(struct pcmcia_socket *s)
     }
     if (lo++)
 	goto out;
-    for (m = mem_db.next; m != &mem_db; m = n) {
-	n = m->next;
+    for (m = mem_db.next; m != &mem_db; m = mm.next) {
+	mm = *m;
 	/* Only probe < 1 MB */
-	if (m->base >= 0x100000) continue;
-	if ((m->base | m->num) & 0xffff) {
-	    ok += do_mem_probe(m->base, m->num, s);
+	if (mm.base >= 0x100000) continue;
+	if ((mm.base | mm.num) & 0xffff) {
+	    ok += do_mem_probe(mm.base, mm.num, s);
 	    continue;
 	}
 	/* Special probe for 64K-aligned block */
 	for (i = 0; i < 4; i++) {
 	    b = order[i] << 12;
-	    if ((b >= m->base) && (b+0x10000 <= m->base+m->num)) {
+	    if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) {
 		if (ok >= mem_limit)
 		    sub_interval(&mem_db, b, 0x10000);
 		else
@@ -537,14 +537,14 @@ void validate_mem(struct pcmcia_socket *s)
 
 void validate_mem(struct pcmcia_socket *s)
 {
-    resource_map_t *m, *n;
+    resource_map_t *m, mm;
     static int done = 0;
     
     if (probe_mem && done++ == 0) {
 	down(&rsrc_sem);
-	for (m = mem_db.next; m != &mem_db; m = n) {
-	    n = m->next;
-	    if (do_mem_probe(m->base, m->num, s))
+	for (m = mem_db.next; m != &mem_db; m = mm.next) {
+	    mm = *m;
+	    if (do_mem_probe(mm.base, mm.num, s))
 		break;
 	}
 	up(&rsrc_sem);