commit 3126dcb7368c152d74cda11a025328853948f9b9
author Shannon Nelson <shannon.nelson@intel.com> Sat Dec 21 05:44:47 2013 +0000
committer Jeff Kirsher <jeffrey.t.kirsher@intel.com> Fri Jan 10 16:30:35 2014 -0800
tree 0b85052b2749804c169f076b853ebe9b27b5eb57
parent 8ee75a8ed01415b4d112715ff369d2a6b1d47aa8

i40e: adjust ITR max and min values

Set the ITR max and min values to match the hardware max value
and the recommended min value.  These values are shifted right
one bit because the register counts in 2 usec units, so leave
a comment to explain.

Change-ID: I289c27955cf6c566a6d21b95c3110b88cbb15dad
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_txrx.h

diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
index 6f8506c..93b8642 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
@@ -29,9 +29,8 @@
 
 /* Interrupt Throttling and Rate Limiting (storm control) Goodies */
 
-#define I40E_MAX_ITR               0x07FF
-#define I40E_MIN_ITR               0x0001
-#define I40E_ITR_USEC_RESOLUTION   2
+#define I40E_MAX_ITR               0x0FF0  /* reg uses 2 usec resolution */
+#define I40E_MIN_ITR               0x0004  /* reg uses 2 usec resolution */
 #define I40E_MAX_IRATE             0x03F
 #define I40E_MIN_IRATE             0x001
 #define I40E_IRATE_USEC_RESOLUTION 4