target/linux/layerscape/patches-5.4/701-net-0295-staging-fsl_ppfe-eth-calculate-PFE_PKT_SIZE-with-SKB.patch

   1 From 2f59069dbb48ee86bee42bf36a4dfafe64028344 Mon Sep 17 00:00:00 2001
   2 From: Calvin Johnson <calvin.johnson@nxp.com>
   3 Date: Thu, 8 Mar 2018 13:58:38 +0530
   4 Subject: [PATCH] staging: fsl_ppfe/eth: calculate PFE_PKT_SIZE with
   5  SKB_DATA_ALIGN
   6
   7 pfe packet size was calculated without considering skb data alignment
   8 and this resulted in jumbo frames crashing kernel when the
   9 cacheline size increased from 64 to 128 bytes with
  10 commit 97303480753e ("arm64: Increase the max granular size").
  11
  12 Modify pfe packet size caclulation to include skb data alignment of
  13 sizeof(struct skb_shared_info).
  14
  15 Signed-off-by: Calvin Johnson <calvin.johnson@nxp.com>
  16 ---
  17  drivers/staging/fsl_ppfe/pfe_hif_lib.h | 2 +-
  18  1 file changed, 1 insertion(+), 1 deletion(-)
  19
  20 --- a/drivers/staging/fsl_ppfe/pfe_hif_lib.h
  21 +++ b/drivers/staging/fsl_ppfe/pfe_hif_lib.h
  22 @@ -146,7 +146,7 @@ struct tx_queue_desc {
  23  #define PFE_BUF_SIZE           2048
  24  #define PFE_PKT_HEADROOM       128
  25
  26 -#define SKB_SHARED_INFO_SIZE   (sizeof(struct skb_shared_info))
  27 +#define SKB_SHARED_INFO_SIZE   SKB_DATA_ALIGN(sizeof(struct skb_shared_info))
  28  #define PFE_PKT_SIZE           (PFE_BUF_SIZE - PFE_PKT_HEADROOM \
  29                                  - SKB_SHARED_INFO_SIZE)
  30  #define MAX_L2_HDR_SIZE                14      /* Not correct for VLAN/PPPoE */