[PATCH] selftests/ir: fix build with ancient kernel headers

[Sean Young]

Since commit e2bcbd7769ee ("tools headers UAPI: remove stale lirc.h"),
the build of the selftests fails on rhel 8 since its version of
/usr/include/linux/lirc.h has no definition of RC_PROTO_RCMM32 etc.

Fixes: e2bcbd7769ee ("tools headers UAPI: remove stale lirc.h")

Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
Signed-off-by: Sean Young <sean@xxxxxxxx>
---
 tools/testing/selftests/ir/ir_loopback.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/testing/selftests/ir/ir_loopback.c b/tools/testing/selftests/ir/ir_loopback.c
index 06256c96df12..8dc104690adc 100644
--- a/tools/testing/selftests/ir/ir_loopback.c
+++ b/tools/testing/selftests/ir/ir_loopback.c
@@ -29,6 +29,13 @@
 #define SYSFS_PATH_MAX 256
 #define DNAME_PATH_MAX 256
 
+/* Support ancient lirc.h which does not have these values */
+#if RC_PROTO_MAX < 26
+#define RC_PROTO_RCMM12 24
+#define RC_PROTO_RCMM24 25
+#define RC_PROTO_RCMM32 26
+#endif
+
 static const struct {
 	enum rc_proto proto;
 	const char *name;
-- 
2.34.1