This is a note to let you know that I've just added the patch titled

ixgbe: add mask for 64 RSS queues

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: ixgbe-add-mask-for-64-rss-queues.patch and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Sun Nov 19 12:02:55 CET 2017

From: Emil Tantilov emil.s.tantilov@intel.com Date: Fri, 4 Nov 2016 14:03:03 -0700 Subject: ixgbe: add mask for 64 RSS queues

From: Emil Tantilov emil.s.tantilov@intel.com

[ Upstream commit 2bf1a87b903bd81b1448a1cef73de59fb6c4d340 ]

The indirection table was reported incorrectly for X550 and newer where we can support up to 64 RSS queues.

Reported-by Krishneil Singh krishneil.k.singh@intel.com Signed-off-by: Emil Tantilov emil.s.tantilov@intel.com Tested-by: Andrew Bowers andrewx.bowers@intel.com Signed-off-by: Jeff Kirsher jeffrey.t.kirsher@intel.com

Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c @@ -307,6 +307,7 @@ static void ixgbe_cache_ring_register(st ixgbe_cache_ring_rss(adapter); }

+#define IXGBE_RSS_64Q_MASK 0x3F #define IXGBE_RSS_16Q_MASK 0xF #define IXGBE_RSS_8Q_MASK 0x7 #define IXGBE_RSS_4Q_MASK 0x3 @@ -602,6 +603,7 @@ static bool ixgbe_set_sriov_queues(struc **/ static bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter) { + struct ixgbe_hw *hw = &adapter->hw; struct ixgbe_ring_feature *f; u16 rss_i;

@@ -610,7 +612,11 @@ static bool ixgbe_set_rss_queues(struct rss_i = f->limit;

f->indices = rss_i; - f->mask = IXGBE_RSS_16Q_MASK; + + if (hw->mac.type < ixgbe_mac_X550) + f->mask = IXGBE_RSS_16Q_MASK; + else + f->mask = IXGBE_RSS_64Q_MASK;

/* disable ATR by default, it will be configured below */ adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;

Patches currently in stable-queue which might be from emil.s.tantilov@intel.com are

queue-4.4/ixgbe-handle-close-suspend-race-with-netif_device_detach-present.patch queue-4.4/ixgbe-do-not-disable-fec-from-the-driver.patch queue-4.4/ixgbe-fix-aer-error-handling.patch queue-4.4/ixgbe-add-mask-for-64-rss-queues.patch