target/linux/ipq806x/patches/0054-of-only-scan-for-reserved-mem-when-fdt-present.patch

   1 From 884ab569aec3a0847702dff0dad133bfb67e234c Mon Sep 17 00:00:00 2001
   2 From: Josh Cartwright <joshc@codeaurora.org>
   3 Date: Thu, 13 Mar 2014 16:36:36 -0500
   4 Subject: [PATCH 054/182] of: only scan for reserved mem when fdt present
   5
   6 When the reserved memory patches hit -next, several legacy (non-DT) boot
   7 failures were detected and bisected down to that commit. There needs to
   8 be some sanity checking whether a DT is even present before parsing the
   9 reserved ranges.
  10
  11 Reported-by: Kevin Hilman <khilman@linaro.org>
  12 Signed-off-by: Josh Cartwright <joshc@codeaurora.org>
  13 Tested-by: Kevin Hilman <khilman@linaro.org>
  14 Signed-off-by: Grant Likely <grant.likely@linaro.org>
  15 ---
  16  drivers/of/fdt.c |    3 +++
  17  1 file changed, 3 insertions(+)
  18
  19 --- a/drivers/of/fdt.c
  20 +++ b/drivers/of/fdt.c
  21 @@ -557,6 +557,9 @@ static int __init __fdt_scan_reserved_me
  22   */
  23  void __init early_init_fdt_scan_reserved_mem(void)
  24  {
  25 +       if (!initial_boot_params)
  26 +               return;
  27 +
  28         of_scan_flat_dt(__fdt_scan_reserved_mem, NULL);
  29         fdt_init_reserved_mem();
  30  }