igb: Change IGB_MIN to allow set rx/tx value between 64 and 80

[ Upstream commit 6319685bdc8ad5310890add907b7c42f89302886 ]

Change the minimum value of RX/TX descriptors to 64 to enable setting the rx/tx
value between 64 and 80. All igb devices can use as low as 64 descriptors.
This change will unify igb with other drivers.
Based on commit 7b1be1987c1e ("e1000e: lower ring minimum size to 64")

Fixes: 9d5c824399de ("igb: PCI-Express 82575 Gigabit Ethernet driver")
Signed-off-by: Olga Zaborska <olga.zaborska@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index 1113bf322f45b55716f25d8d89ce8c46c79067df..a1e924391ae5bb0c76e6a02afe44063507a048cb 100644 (file)
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -52,11 +52,11 @@ struct igb_adapter;
 /* TX/RX descriptor defines */
 #define IGB_DEFAULT_TXD                256
 #define IGB_DEFAULT_TX_WORK    128
-#define IGB_MIN_TXD            80
+#define IGB_MIN_TXD            64
 #define IGB_MAX_TXD            4096
 
 #define IGB_DEFAULT_RXD                256
-#define IGB_MIN_RXD            80
+#define IGB_MIN_RXD            64
 #define IGB_MAX_RXD            4096
 
 #define IGB_DEFAULT_ITR                3 /* dynamic */