Fix an overflow case in fdt_offset_ptr() detected by GCC 4.3.
Using Gcc 4.3 detected this problem:
../dtc/libfdt/fdt.c: In function 'fdt_next_tag':
../dtc/libfdt/fdt.c:82: error: assuming signed overflow does not
occur when assuming that (X + c) < X is always false
To fix the problem, treat the offset as an unsigned int.
The problem report and proposed fix were provided
by Steve Papacharalambous <stevep@freescale.com>.
Signed-off-by: Jon Loeliger <jdl@freescale.com>
diff --git a/include/libfdt.h b/include/libfdt.h
index 94c35e3..5492a53 100644
--- a/include/libfdt.h
+++ b/include/libfdt.h
@@ -122,7 +122,7 @@
/* Low-level functions (you probably don't need these) */
/**********************************************************************/
-const void *fdt_offset_ptr(const void *fdt, int offset, int checklen);
+const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen);
static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen)
{
return (void *)(uintptr_t)fdt_offset_ptr(fdt, offset, checklen);