[PATCH 5.11 05/31] igb: Enable RSS for Intel I211 Ethernet Controller

Greg Kroah-Hartman
2021-05-05T12:12:08Z

From: Nick Lowe <nick.lowe@gmail.com>

commit 6e6026f2dd2005844fb35c3911e8083c09952c6c upstream.

The Intel I211 Ethernet Controller supports 2 Receive Side Scaling (RSS)
queues. It should not be excluded from having this feature enabled.

Via commit c883de9fd787 ("igb: rename igb define to be more generic")
E1000_MRQC_ENABLE_RSS_4Q was renamed to E1000_MRQC_ENABLE_RSS_MQ to
indicate that this is a generic bit flag to enable queues and not
a flag that is specific to devices that support 4 queues

The bit flag enables 2, 4 or 8 queues appropriately depending on the part.

Tested with a multicore CPU and frames were then distributed as expected.

This issue appears to have been introduced because of confusion caused
by the prior name.

Signed-off-by: Nick Lowe <nick.lowe@gmail.com>
Tested-by: David Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/intel/igb/igb_main.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4482,8 +4482,7 @@ static void igb_setup_mrqc(struct igb_ad
else
mrqc |= E1000_MRQC_ENABLE_VMDQ;
} else {
- if (hw->mac.type != e1000_i211)
- mrqc |= E1000_MRQC_ENABLE_RSS_MQ;
+ mrqc |= E1000_MRQC_ENABLE_RSS_MQ;
}
igb_vmm_control(adapter);