[PATCH v1 3/5] selftests/arm64: Check failures to set tags in check_tags_inclusion

[Mark Brown]

The MTE check_tags_inclusion test uses the mte_switch_mode() helper but
ignores the return values it generates meaning we might not be testing
the things we're trying to test, fail the test if it reports an error.
The helper will log any errors it returns.

Signed-off-by: Mark Brown <broonie at kernel.org>
---
 .../selftests/arm64/mte/check_tags_inclusion.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/arm64/mte/check_tags_inclusion.c b/tools/testing/selftests/arm64/mte/check_tags_inclusion.c
index b906914997ce..d180ba3df990 100644
--- a/tools/testing/selftests/arm64/mte/check_tags_inclusion.c
+++ b/tools/testing/selftests/arm64/mte/check_tags_inclusion.c
@@ -49,7 +49,7 @@ static int verify_mte_pointer_validity(char *ptr, int mode)
 static int check_single_included_tags(int mem_type, int mode)
 {
 	char *ptr;
-	int tag, run, result = KSFT_PASS;
+	int tag, run, ret, result = KSFT_PASS;
 
 	ptr = (char *)mte_allocate_memory(BUFFER_SIZE + MT_GRANULE_SIZE, mem_type, 0, false);
 	if (check_allocated_memory(ptr, BUFFER_SIZE + MT_GRANULE_SIZE,
@@ -57,7 +57,9 @@ static int check_single_included_tags(int mem_type, int mode)
 		return KSFT_FAIL;
 
 	for (tag = 0; (tag < MT_TAG_COUNT) && (result == KSFT_PASS); tag++) {
-		mte_switch_mode(mode, MT_INCLUDE_VALID_TAG(tag));
+		ret = mte_switch_mode(mode, MT_INCLUDE_VALID_TAG(tag));
+		if (ret != 0)
+			result = KSFT_FAIL;
 		/* Try to catch a excluded tag by a number of tries. */
 		for (run = 0; (run < RUNS) && (result == KSFT_PASS); run++) {
 			ptr = (char *)mte_insert_tags(ptr, BUFFER_SIZE);
@@ -111,14 +113,16 @@ static int check_multiple_included_tags(int mem_type, int mode)
 static int check_all_included_tags(int mem_type, int mode)
 {
 	char *ptr;
-	int run, result = KSFT_PASS;
+	int run, ret, result = KSFT_PASS;
 
 	ptr = (char *)mte_allocate_memory(BUFFER_SIZE + MT_GRANULE_SIZE, mem_type, 0, false);
 	if (check_allocated_memory(ptr, BUFFER_SIZE + MT_GRANULE_SIZE,
 				   mem_type, false) != KSFT_PASS)
 		return KSFT_FAIL;
 
-	mte_switch_mode(mode, MT_INCLUDE_TAG_MASK);
+	ret = mte_switch_mode(mode, MT_INCLUDE_TAG_MASK);
+	if (ret != 0)
+		return KSFT_FAIL;
 	/* Try to catch a excluded tag by a number of tries. */
 	for (run = 0; (run < RUNS) && (result == KSFT_PASS); run++) {
 		ptr = (char *)mte_insert_tags(ptr, BUFFER_SIZE);
@@ -135,13 +139,15 @@ static int check_all_included_tags(int mem_type, int mode)
 static int check_none_included_tags(int mem_type, int mode)
 {
 	char *ptr;
-	int run;
+	int run, ret;
 
 	ptr = (char *)mte_allocate_memory(BUFFER_SIZE, mem_type, 0, false);
 	if (check_allocated_memory(ptr, BUFFER_SIZE, mem_type, false) != KSFT_PASS)
 		return KSFT_FAIL;
 
-	mte_switch_mode(mode, MT_EXCLUDE_TAG_MASK);
+	ret = mte_switch_mode(mode, MT_EXCLUDE_TAG_MASK);
+	if (ret != 0)
+		return KSFT_FAIL;
 	/* Try to catch a excluded tag by a number of tries. */
 	for (run = 0; run < RUNS; run++) {
 		ptr = (char *)mte_insert_tags(ptr, BUFFER_SIZE);
-- 
2.30.2