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    • Julia Lawall's avatar
      ASoC: pl022_ds.c: Add of_node_put to avoid memory leak · 880b8ffd
      Julia Lawall authored
      Add a call to of_node_put in the error handling code following a call to
      of_parse_phandle.
      
      This patch also moves the existing call to of_node_put tothe end of the
      error handling code, to make it possible to jump to of_node_put without
      doing the other cleanup operations.  These appear to be disjoint
      operations, so the ordering doesn't matter.
      
      The semantic match that finds this problem is as follows:
      (http://coccinelle.lip6.fr/)
      
      // <smpl>
      @r exists@
      local idexpression x;
      expression E,E1,E2;
      statement S;
      @@
      
      *x =
      (of_find_node_by_path
      |of_find_node_by_name
      |of_find_node_by_phandle
      |of_get_parent
      |of_get_next_parent
      |of_get_next_child
      |of_find_compatible_node
      |of_match_node
      |of_find_node_by_type
      |of_find_node_with_property
      |of_find_matching_node
      |of_parse_phandle
      )(...);
      ...
      if (x == NULL) S
      <... when != x = E
      *if (...) {
        ... when != of_node_put(x)
            when != if (...) { ... of_node_put(x); ... }
      (
        return <+...x...+>;
      |
      *  return ...;
      )
      }
      ...>
      (
      E2 = x;
      |
      of_node_put(x);
      )
      // </smpl>
      Signed-off-by: default avatarJulia Lawall <julia@diku.dk>
      Acked-by: default avatarTimur Tabi <timur@freescale.com>
      Acked-by: default avatarLiam Girdwood <lrg@slimlogic.uo.uk>
      Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
      880b8ffd