From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jacob Keller Date: Mon, 24 Aug 2015 17:01:59 -0700 Subject: [Intel-wired-lan] [next-queue] fm10k: Correct MTU for jumbo frames In-Reply-To: <1440460921-28318-1-git-send-email-jacob.e.keller@intel.com> References: <1440460921-28318-1-git-send-email-jacob.e.keller@intel.com> Message-ID: <1440460921-28318-2-git-send-email-jacob.e.keller@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: Based on hardware testing, the host interface can support up to 15368 bytes on the wire. Subtracting 8 for an internal switch tag and 14 for the L2 header shows that the MTU should not be allowed to be set above 15346 bytes. Signed-off-by: Matthew Vick Signed-off-by: Jacob Keller --- drivers/net/ethernet/intel/fm10k/fm10k.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/fm10k/fm10k.h b/drivers/net/ethernet/intel/fm10k/fm10k.h index 14440200499b..9e05a36783e5 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k.h +++ b/drivers/net/ethernet/intel/fm10k/fm10k.h @@ -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 15346 /* Maximum supported size 15K */ #define MAX_QUEUES FM10K_MAX_QUEUES_PF -- 2.5.0.280.g4aaba03