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fm10k: Correct MTU for jumbo frames 

Based on hardware testing, the host interface supports up to 15368 bytes
as the maximum frame size. To determine the correct MTU, we subtract 8
for the internal switch tag, 14 for the L2 header, and 4 for the
appended FCS header, resulting in 15342 bytes of payload for our maximum
MTU on jumbo frames.

Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jacob Keller 2015-08-25 13:49:11 -07:00 committed by Jeff Kirsher
parent 1340181fe4
commit 8c7ee6d2ca
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/intel/fm10k/fm10k.h
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@ -33,7 +33,7 @@
#include "fm10k_pf.h"
#include "fm10k_vf.h"
#define FM10K_MAX_JUMBO_FRAME_SIZE 15358 /* Maximum supported size 15K */
#define FM10K_MAX_JUMBO_FRAME_SIZE 15342 /* Maximum supported size 15K */
#define MAX_QUEUES FM10K_MAX_QUEUES_PF