bonding: Allow setting max_bonds to zero

	Permit bonding to function rationally if max_bonds is set to
zero.  This will load the module, but create no master devices (which can
be created via sysfs).

	Requires some change to bond_create_sysfs; currently, the
netdev sysfs directory is determined from the first bonding device created,
but this is no longer possible.  Instead, an interface from net/core is
created to create and destroy files in net_class.

	Based on a patch submitted by Phil Oester <kernel@linuxaces.com>.
Modified by Jay Vosburgh to fix the sysfs issue mentioned above and to
update the documentation.

Signed-off-by: Phil Oester <kernel@linuxace.com>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 3b6d66a8ab98..d57b65dc2c72 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -4750,11 +4750,11 @@ static int bond_check_params(struct bond_params *params)
                 }
         }
 
-        if (max_bonds < 1 || max_bonds > INT_MAX) {
+        if (max_bonds < 0 || max_bonds > INT_MAX) {
                 printk(KERN_WARNING DRV_NAME
                        ": Warning: max_bonds (%d) not in range %d-%d, so it "
                        "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
-                       max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS);
+                       max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
                 max_bonds = BOND_DEFAULT_MAX_BONDS;
         }
 
@@ -4953,7 +4953,7 @@ static int bond_check_params(struct bond_params *params)
 
                 printk("\n");
 
-        } else {
+        } else if (max_bonds) {
                 /* miimon and arp_interval not set, we need one so things
                  * work as expected, see bonding.txt for details
                  */