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of: overlay: correctly apply overlay node with unit-address 

Correct existing node name detection when overlay node name has
a unit-address.

Expected test result is overlay will update the nodes and properties
for /testcase-data-2/fairway-1/ride@100/ after this commit.

Before this commit:

   Console error message near end of unittest:
      OF: Duplicate name in fairway-1, renamed to "ride@100#1"

   $ cd /proc/device-tree/testcase-data-2/fairway-1/
   $ # extra node: ride@100#1
   $ ls
   #address-cells  linux,phandle   phandle         ride@200
   #size-cells     name            ride@100        status
   compatible      orientation     ride@100#1
   $ cd /proc/device-tree/testcase-data-2/fairway-1/ride@100/
   $ ls track@30/incline-up
   ls: track@30/incline-up: No such file or directory
   $ ls track@40/incline-up
   ls: track@40/incline-up: No such file or directory

After this commit:

   Console error message no longer occurs

   $ cd /proc/device-tree/testcase-data-2/fairway-1/
   $ # no extra node: ride@100#1
   $ ls
   #address-cells  compatible      name            phandle         ride@200
   #size-cells     linux,phandle   orientation     ride@100        status
   $ cd /proc/device-tree/testcase-data-2/fairway-1/ride@100/
   $ ls track@30/incline-up
   track@30/incline-up
   $ ls track@40/incline-up
   track@40/incline-up

Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Frank Rowand 2017-07-19 09:25:21 -07:00 committed by Rob Herring
parent 60a0004cc9
commit c1cd1e01fe
1 changed files with 4 additions and 1 deletions
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5
drivers/of/overlay.c
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@ -130,7 +130,10 @@ static int of_overlay_apply_single_device_node(struct of_overlay *ov,
return -ENOMEM;
/* NOTE: Multiple mods of created nodes not supported */
tchild = of_get_child_by_name(target, cname);
for_each_child_of_node(target, tchild)
if (!of_node_cmp(cname, kbasename(tchild->full_name)))
break;
if (tchild != NULL) {
/* new overlay phandle value conflicts with existing value */
if (child->phandle)