[PATCH] allow dd=URL to update storage drivers

[Jeff Bastian <jbastian redhat com>]

See BZ 454478 on RHEL 5.

When downloading a driver disk from an http or ftp server with
  linux dd=http://...
the loader first calls busProbe() to load the network drivers, but this 
also loads storage drivers (and more), so you cannot update storage 
drivers with this method.

The attached patch turns the LOADER_FLAGS_NOSTORAGE flag on before calling 
busProbe() and then restores the original flags afterwards.  This loads 
the network drivers, but doesn't touch storage until the next call to 
busProbe() which will use the updated drivers.

Thoughts?

Jeff

--- anaconda-11.1.2.87/loader2/loader.c	2007-10-17 19:37:45.000000000 +0200
+++ anaconda-11.1.2.87/loader2/loader.c.new	2008-06-11 17:57:19.000000000 +0200
@@ -1552,13 +1552,14 @@ int main(int argc, char ** argv) {
      */
     earlyModuleLoad(modInfo, modLoaded, modDeps, 0);
 
-    busProbe(modInfo, modLoaded, modDeps, 0);
-
-    /* JKFIXME: we'd really like to do this before the busprobe, but then
-     * we won't have network devices available (and that's the only thing
-     * we support with this right now */
     if (loaderData.ddsrc != NULL) {
+        uint64_t save_flags = flags;
+        flags |= LOADER_FLAGS_NOSTORAGE;
+        busProbe(modInfo, modLoaded, modDeps, 0);
+        flags = save_flags;
         getDDFromSource(&loaderData, loaderData.ddsrc);
+    } else {
+        busProbe(modInfo, modLoaded, modDeps, 0);
     }
 
     /* JKFIXME: loaderData->ksFile is set to the arg from the command line,