The ATB DTB mangle code will enter an infinite loop if it encounters a
word in the command line that contains an r in the middle of the word.
Fix this by increasing ptr everytime before invoking strchr, ot avoid
finding the same r again.
This fixes booting at least on Netgear R7500v1, which contains
"ubi.mtd=rootfs" in its commandline, triggering the misbehaviour.
Fixes: 0ddcbee26151 ("ipq806x: activate ATAG DTB mangle and EA8500 rootblock in dts")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+ ptr = str - 1;
+
+ do {
-+ ptr++;
+ //first find an 'r' at the begining or after a space
+ do {
++ ptr++;
+ ptr = strchr(ptr, 'r');
+ if(!ptr) return dest;
+