[rtems commit] libfdt: fdt_node_offset_by_phandle(): Fix comparison warning

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    26bee335477cf8358a0e5fde19cfc833f83d7633
Changeset: http://git.rtems.org/rtems/commit/?id=26bee335477cf8358a0e5fde19cfc833f83d7633

Author:    Andre Przywara <andre.przywara at arm.com>
Date:      Mon Sep 21 17:53:02 2020 +0100

libfdt: fdt_node_offset_by_phandle(): Fix comparison warning

With -Wsign-compare, compilers warn about a mismatching signedness
in a comparison in fdt_node_offset_by_phandle().

Uses a better suited bitwise NOT operator to denote the special value of
-1, which automatically results in an unsigned type.

Signed-off-by: Andre Przywara <andre.przywara at arm.com>
Message-Id: <20200921165303.9115-14-andre.przywara at arm.com>
Signed-off-by: David Gibson <david at gibson.dropbear.id.au>

---

 cpukit/dtc/libfdt/fdt_ro.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cpukit/dtc/libfdt/fdt_ro.c b/cpukit/dtc/libfdt/fdt_ro.c
index ddb5a2d..e192184 100644
--- a/cpukit/dtc/libfdt/fdt_ro.c
+++ b/cpukit/dtc/libfdt/fdt_ro.c
@@ -680,7 +680,7 @@ int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle)
 {
 	int offset;
 
-	if ((phandle == 0) || (phandle == -1))
+	if ((phandle == 0) || (phandle == ~0U))
 		return -FDT_ERR_BADPHANDLE;
 
 	FDT_RO_PROBE(fdt);