layerscape: add patches-5.4

[openwrt/staging/wigyori.git] / target / linux / layerscape / patches-5.4 / 701-net-0151-soc-fsl-dpio-Prefer-the-CPU-affine-DPIO.patch

diff --git a/target/linux/layerscape/patches-5.4/701-net-0151-soc-fsl-dpio-Prefer-the-CPU-affine-DPIO.patch b/target/linux/layerscape/patches-5.4/701-net-0151-soc-fsl-dpio-Prefer-the-CPU-affine-DPIO.patch
new file mode 100644 (file)
index 0000000..e9fdc7d
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/701-net-0151-soc-fsl-dpio-Prefer-the-CPU-affine-DPIO.patch
@@ -0,0 +1,35 @@
+From 33b7977ba754b6ec4e65aaae34de92d4086ea0bd Mon Sep 17 00:00:00 2001
+From: Roy Pledge <roy.pledge@nxp.com>
+Date: Wed, 13 Sep 2017 17:03:06 -0400
+Subject: [PATCH] soc: fsl: dpio: Prefer the CPU affine DPIO
+
+Use the cpu affine DPIO unless there isn't one which can happen
+if less DPIOs than cores are assign to the kernel.
+
+Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
+---
+ drivers/soc/fsl/dpio/dpio-service.c | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+--- a/drivers/soc/fsl/dpio/dpio-service.c
++++ b/drivers/soc/fsl/dpio/dpio-service.c
+@@ -58,7 +58,7 @@ static inline struct dpaa2_io *service_s
+        * If cpu == -1, choose the current cpu, with no guarantees about
+        * potentially being migrated away.
+        */
+-      if (unlikely(cpu < 0))
++      if (cpu < 0)
+               cpu = smp_processor_id();
+ 
+       /* If a specific cpu was requested, pick it up immediately */
+@@ -70,6 +70,10 @@ static inline struct dpaa2_io *service_s
+       if (d)
+               return d;
+ 
++      d = service_select_by_cpu(d, -1);
++      if (d)
++              return d;
++
+       spin_lock(&dpio_list_lock);
+       d = list_entry(dpio_list.next, struct dpaa2_io, node);
+       list_del(&d->node);