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-rw-r--r--target/linux/ipq806x/patches/0054-of-only-scan-for-reserved-mem-when-fdt-present.patch35
1 files changed, 35 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches/0054-of-only-scan-for-reserved-mem-when-fdt-present.patch b/target/linux/ipq806x/patches/0054-of-only-scan-for-reserved-mem-when-fdt-present.patch
new file mode 100644
index 0000000000..a5423d8446
--- /dev/null
+++ b/target/linux/ipq806x/patches/0054-of-only-scan-for-reserved-mem-when-fdt-present.patch
@@ -0,0 +1,35 @@
+From 884ab569aec3a0847702dff0dad133bfb67e234c Mon Sep 17 00:00:00 2001
+From: Josh Cartwright <joshc@codeaurora.org>
+Date: Thu, 13 Mar 2014 16:36:36 -0500
+Subject: [PATCH 054/182] of: only scan for reserved mem when fdt present
+
+When the reserved memory patches hit -next, several legacy (non-DT) boot
+failures were detected and bisected down to that commit. There needs to
+be some sanity checking whether a DT is even present before parsing the
+reserved ranges.
+
+Reported-by: Kevin Hilman <khilman@linaro.org>
+Signed-off-by: Josh Cartwright <joshc@codeaurora.org>
+Tested-by: Kevin Hilman <khilman@linaro.org>
+Signed-off-by: Grant Likely <grant.likely@linaro.org>
+---
+ drivers/of/fdt.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
+index 510c0d8..501bc83 100644
+--- a/drivers/of/fdt.c
++++ b/drivers/of/fdt.c
+@@ -557,6 +557,9 @@ static int __init __fdt_scan_reserved_mem(unsigned long node, const char *uname,
+ */
+ void __init early_init_fdt_scan_reserved_mem(void)
+ {
++ if (!initial_boot_params)
++ return;
++
+ of_scan_flat_dt(__fdt_scan_reserved_mem, NULL);
+ fdt_init_reserved_mem();
+ }
+--
+1.7.10.4
+