coresight: making cpu index lookup arm64 compliant

Function "get_logical_index()" is not available on arm64.
Instead of adding the function simply using "of_get_cpu_node()" and
comparing the return value with cpu handles yields the same
result.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 6 insertions, 12 deletions

diff --git a/drivers/coresight/of_coresight.c b/drivers/coresight/of_coresight.c
index c3efa418a86d..f3cc8e97a0f8 100644
--- a/drivers/coresight/of_coresight.c
+++ b/drivers/coresight/of_coresight.c
@@ -22,6 +22,7 @@
 #include <linux/platform_device.h>
 #include <linux/amba/bus.h>
 #include <linux/coresight.h>
+#include <linux/cpumask.h>
 #include <asm/smp_plat.h>
 
 
@@ -113,7 +114,7 @@ static int of_coresight_alloc_memory(struct device *dev,
 struct coresight_platform_data *of_get_coresight_platform_data(
                                 struct device *dev, struct device_node *node)
 {
-        int i = 0, ret = 0;
+        int i = 0, ret = 0, cpu;
         struct coresight_platform_data *pdata;
         struct of_endpoint endpoint, rendpoint;
         struct device *rdev;
@@ -187,17 +188,10 @@ struct coresight_platform_data *of_get_coresight_platform_data(
         /* Affinity defaults to CPU0 */
         pdata->cpu = 0;
         dn = of_parse_phandle(node, "cpu", 0);
-        if (dn) {
-                const u32 *cell;
-                int len, index;
-                u64 hwid;
-
-                cell = of_get_property(dn, "reg", &len);
-                if (cell) {
-                        hwid = of_read_number(cell, of_n_addr_cells(dn));
-                        index = get_logical_index(hwid);
-                        if (index != -EINVAL)
-                                pdata->cpu = index;
+        for (cpu = 0; dn && cpu < nr_cpu_ids; cpu++) {
+                if (dn == of_get_cpu_node(cpu, NULL)) {
+                        pdata->cpu = cpu;
+                        break;
                 }
         }