of/fdt: Don't copy garbage after "/" in root node path

The root node path must be internally converted to "/", or various
pieces of code looking for it that way will fail. The code to do
that however had a bug where we might incorrectly append pieces
of the original path from the fdt to the "/".

We should probably add a proper dedicated accessor for the root node
but in the meantime this patch should fix it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 91a375fb6ae6..c2b08dcdbc53 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -186,6 +186,7 @@ static unsigned long unflatten_dt_node(struct boot_param_header *blob,
                          */
                         fpsize = 1;
                         allocl = 2;
+                        l = 0;
                 } else {
                         /* account for '/' and path size minus terminal 0
                          * already in 'l'