Choose better devnumbers and tidy up some issues with finding names.

[thirdparty/mdadm.git] / mdopen.c

diff --git a/mdopen.c b/mdopen.c
index b6dbbe9387bf4d431863a31f5e903f2879ac3ccf..5cca17922243d50a339f79d85beb7818e6187e9d 100644 (file)
--- a/mdopen.c
+++ b/mdopen.c
@@ -183,7 +183,10 @@ int open_mddev(char *dev, int autof)
                if (num < 0) {
                        /* need to pick an unused number */
                        mdlist = mdstat_read(0, 0);
-                       for (num = 0 ; ; num++) {
+                       /* Choose a large number.  Start from 127 and search down,
+                        * but if nothing is found, start really big
+                        */
+                       for (num = 127 ; num != 128 ; num = num ? num-1 : (1<<22)-1) {
                                struct mdstat_ent *me;
                                int devnum = num;
                                if (major != MD_MAJOR)
@@ -193,7 +196,7 @@ int open_mddev(char *dev, int autof)
                                        if (me->devnum == devnum)
                                                break;
                                if (!me) {
-                                       /* doesn't exist if mdstat.
+                                       /* doesn't exist in mdstat.
                                         * make sure it is new to /dev too
                                         */
                                        char *dn;