target/linux/layerscape/patches-5.4/701-net-0078-staging-fsl_qbman-Recalcuate-cursor-after-consuming-.patch

   1 From c9d41c728cb9fc5c100030d39d81be3d8e0b26d7 Mon Sep 17 00:00:00 2001
   2 From: Roy Pledge <roy.pledge@nxp.com>
   3 Date: Wed, 8 Aug 2018 17:13:48 -0400
   4 Subject: [PATCH] staging/fsl_qbman: Recalcuate cursor after consuming ring
   5
   6 If the dqrr_init() function consumes frames during init
   7 the cursor needs to be updated before anything starts
   8 to use the ring.
   9
  10 Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
  11 ---
  12  drivers/staging/fsl_qbman/qman_low.h | 3 +++
  13  1 file changed, 3 insertions(+)
  14
  15 --- a/drivers/staging/fsl_qbman/qman_low.h
  16 +++ b/drivers/staging/fsl_qbman/qman_low.h
  17 @@ -682,6 +682,9 @@ static inline int qm_dqrr_init(struct qm
  18                 (0 ? 0x10 : 0);                         /* Ignore SP */
  19         qm_out(CFG, cfg);
  20         qm_dqrr_set_maxfill(portal, max_fill);
  21 +
  22 +       /* Recalculate cursor as we may have consumed frames */
  23 +       dqrr->cursor = dqrr->ring + dqrr->ci;
  24         return 0;
  25  }
  26