Patch for jedec_probe

[Jonas Holmberg <jonas.holmberg@axis.com>]

I need the jedec_probe to give up when finding a chip of a different
manufacturer or device id (or no chip at all) than a previously found
chip in the same map.

This patch below fixes that. Is it OK to commit?

/Jonas



Index: jedec_probe.c
===================================================================
RCS file: /home/cvs/mtd/drivers/mtd/chips/jedec_probe.c,v
retrieving revision 1.10
diff -u -r1.10 jedec_probe.c
--- jedec_probe.c       2002/01/21 18:09:01     1.10
+++ jedec_probe.c       2002/02/04 10:46:45
@@ -832,6 +832,19 @@
                        goto retry;
                }
                return 0;
+       } else {
+               __u16 mfr;
+               __u16 id;
+
+               /* Make sure it is a chip of the same manufacturer and
id */
+               mfr = jedec_read_mfr(map, base, cfi);
+               id = jedec_read_id(map, base, cfi);
+
+               if ((mfr != cfi->mfr) || (id != cfi->id)) {
+                       printk(KERN_DEBUG "%s: Found different chip or
no chip at all (mfr %x, id %x) at 0x%x\n",
+                              map->name, mfr, id, base);
+                       return 0;
+               }
        }

        /* Check each previous chip to see if it's an alias */