[PATCH] e1000: The user-supplied itr setting needs the lower 2 bits masked off

The lower 2 bits of a user-supplied itr setting (via ethtool) need to be
masked off: These lower two bits are used as control bits.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/net/e1000/e1000_param.c b/drivers/net/e1000/e1000_param.c
index cbfcd7f2889f..cf2a279307e1 100644
--- a/drivers/net/e1000/e1000_param.c
+++ b/drivers/net/e1000/e1000_param.c
@@ -487,7 +487,9 @@ e1000_check_options(struct e1000_adapter *adapter)
                                 e1000_validate_option(&adapter->itr, &opt,
                                         adapter);
                                 /* save the setting, because the dynamic bits change itr */
-                                adapter->itr_setting = adapter->itr;
+                                /* clear the lower two bits because they are
+                                 * used as control */
+                                adapter->itr_setting = adapter->itr & ~3;
                                 break;
                         }
                 } else {