target/linux/layerscape/patches-5.4/701-net-0151-soc-fsl-dpio-Prefer-the-CPU-affine-DPIO.patch

   1 From 33b7977ba754b6ec4e65aaae34de92d4086ea0bd Mon Sep 17 00:00:00 2001
   2 From: Roy Pledge <roy.pledge@nxp.com>
   3 Date: Wed, 13 Sep 2017 17:03:06 -0400
   4 Subject: [PATCH] soc: fsl: dpio: Prefer the CPU affine DPIO
   5
   6 Use the cpu affine DPIO unless there isn't one which can happen
   7 if less DPIOs than cores are assign to the kernel.
   8
   9 Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
  10 ---
  11  drivers/soc/fsl/dpio/dpio-service.c | 6 +++++-
  12  1 file changed, 5 insertions(+), 1 deletion(-)
  13
  14 --- a/drivers/soc/fsl/dpio/dpio-service.c
  15 +++ b/drivers/soc/fsl/dpio/dpio-service.c
  16 @@ -58,7 +58,7 @@ static inline struct dpaa2_io *service_s
  17          * If cpu == -1, choose the current cpu, with no guarantees about
  18          * potentially being migrated away.
  19          */
  20 -       if (unlikely(cpu < 0))
  21 +       if (cpu < 0)
  22                 cpu = smp_processor_id();
  23
  24         /* If a specific cpu was requested, pick it up immediately */
  25 @@ -70,6 +70,10 @@ static inline struct dpaa2_io *service_s
  26         if (d)
  27                 return d;
  28
  29 +       d = service_select_by_cpu(d, -1);
  30 +       if (d)
  31 +               return d;
  32 +
  33         spin_lock(&dpio_list_lock);
  34         d = list_entry(dpio_list.next, struct dpaa2_io, node);
  35         list_del(&d->node);