[PATCH v4 06/31] accel: ethosu: Fix runtime PM get error handling

["Rob Herring (Arm)" <robh@kernel.org>]

pm_runtime_get_if_active() can return an error including for !CONFIG_PM.
Do not treat that as an active runtime-PM reference.

Fixes: 5a5e9c0228e6 ("accel: Add Arm Ethos-U NPU driver")
Cc: stable@vger.kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
---
v4:
 - new patch
---
 drivers/accel/ethosu/ethosu_perfmon.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/accel/ethosu/ethosu_perfmon.c b/drivers/accel/ethosu/ethosu_perfmon.c
index 26f625374f9d..0ae2df3ceac8 100644
--- a/drivers/accel/ethosu/ethosu_perfmon.c
+++ b/drivers/accel/ethosu/ethosu_perfmon.c
@@ -71,7 +71,8 @@ void ethosu_perfmon_stop_locked(struct ethosu_device *ethosu, struct ethosu_perf
 
 	ncounters = perfmon->ncounters - 1;
 
-	if (!pm_runtime_get_if_active(ethosu->base.dev)) {
+	if (IS_ENABLED(CONFIG_PM) &&
+	    pm_runtime_get_if_active(ethosu->base.dev) <= 0) {
 		ethosu->perfmon_state.active = NULL;
 		return;
 	}

-- 
2.53.0