4.4-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit e9ee3238f8a480bbca58e51d02a93628d7c1f265 ]
X550 allows for up to 64 RSS queues, but the driver can have max of 63 (-1 MSIX vector for link).
On systems with >= 64 CPUs the driver will set the redirection table for all 64 queues which will result in packets being dropped.
Signed-off-by: Emil Tantilov emil.s.tantilov@intel.com Tested-by: Phil Schmitt phillip.j.schmitt@intel.com Signed-off-by: Jeff Kirsher jeffrey.t.kirsher@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/intel/ixgbe/ixgbe.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h index 1d2174526a4c..18e4e4a69262 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h @@ -312,7 +312,7 @@ enum ixgbe_ring_f_enum { };
#define IXGBE_MAX_RSS_INDICES 16 -#define IXGBE_MAX_RSS_INDICES_X550 64 +#define IXGBE_MAX_RSS_INDICES_X550 63 #define IXGBE_MAX_VMDQ_INDICES 64 #define IXGBE_MAX_FDIR_INDICES 63 /* based on q_vector limit */ #define IXGBE_MAX_FCOE_INDICES 8