[PATCH] drm/panfrost: Don't try to map on error faults

[Tomeu Vizoso]

If the exception type isn't one of the normal faults, don't try to map
and instead go straight to a terminal fault.

Otherwise, we can get flooded by kernel warnings and further faults.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso at collabora.com>
---
 drivers/gpu/drm/panfrost/panfrost_mmu.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
index 763cfca886a7..80abddb4544c 100644
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -596,8 +596,9 @@ static irqreturn_t panfrost_mmu_irq_handler_thread(int irq, void *data)
 		source_id = (fault_status >> 16);
 
 		/* Page fault only */
-		if ((status & mask) == BIT(i)) {
-			WARN_ON(exception_type < 0xC1 || exception_type > 0xC4);
+		if ((status & mask) == BIT(i) &&
+		     exception_type >= 0xC1 &&
+		     exception_type <= 0xC4) {
 
 			ret = panfrost_mmu_map_fault_addr(pfdev, i, addr);
 			if (!ret) {
-- 
2.21.0