[Intel-gfx] [PATCH] drm/i915/selftests: Fix compare functions provided for sorting

[Sudeep Holla]

Both cmp_u32 and cmp_u64 are comparing the pointers instead of the value
at those pointers. This will result in incorrect/unsorted list. Fix it
by deferencing the pointers before comparison.

Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Signed-off-by: Sudeep Holla <sudeep.holla at arm.com>
---
 drivers/gpu/drm/i915/gt/selftest_rps.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Hi,

I am not sure if I can put 2 fixes tags, but these are the ones affected.

Fixes: 4ba74e53ada3 ("drm/i915/selftests: Verify frequency scaling with RPS")
Fixes: 8757797ff9c9 ("drm/i915/selftests: Repeat the rps clock frequency measurement")

I made similar mistake and after I fixed it, just looked if there are any
similar bugs and found this.

Regards,
Sudeep

diff --git a/drivers/gpu/drm/i915/gt/selftest_rps.c b/drivers/gpu/drm/i915/gt/selftest_rps.c
index 5049c3dd08a6..c91981e75ebf 100644
--- a/drivers/gpu/drm/i915/gt/selftest_rps.c
+++ b/drivers/gpu/drm/i915/gt/selftest_rps.c
@@ -44,9 +44,9 @@ static int cmp_u64(const void *A, const void *B)
 {
 	const u64 *a = A, *b = B;
 
-	if (a < b)
+	if (*a < *b)
 		return -1;
-	else if (a > b)
+	else if (*a > *b)
 		return 1;
 	else
 		return 0;
@@ -56,9 +56,9 @@ static int cmp_u32(const void *A, const void *B)
 {
 	const u32 *a = A, *b = B;
 
-	if (a < b)
+	if (*a < *b)
 		return -1;
-	else if (a > b)
+	else if (*a > *b)
 		return 1;
 	else
 		return 0;
-- 
2.17.1