X-Git-Url: http://git.openwrt.org/?a=blobdiff_plain;f=target%2Flinux%2Flayerscape%2Fpatches-5.4%2F701-net-0151-soc-fsl-dpio-Prefer-the-CPU-affine-DPIO.patch;fp=target%2Flinux%2Flayerscape%2Fpatches-5.4%2F701-net-0151-soc-fsl-dpio-Prefer-the-CPU-affine-DPIO.patch;h=e9fdc7d0da7352bb5ebe4f332d63f47f8977e65f;hb=cddd4591404fb4c53dc0b3c0b15b942cdbed4356;hp=0000000000000000000000000000000000000000;hpb=d1d2c0b5579ea4f69a42246c9318539d61ba1999;p=openwrt%2Fstaging%2Fwigyori.git

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
index 0000000000..e9fdc7d0da
--- /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);