On 05/02/2020 10:07 am, Tomeu Vizoso wrote:
If the exception type isn't one of the normal faults, don't try to map and instead go straight to a terminal fault.
"One of the the normal faults" seems a rather vague way of saying "a translation fault", which is what we're specifically handling here, and logically the only fault reflecting something not yet mapped rather than mapped inappropriately ;)
(Who knows how the level ended up as 1-4 rather than 0-3 as it really should be - another Mali Mystery(TM)...)
Otherwise, we can get flooded by kernel warnings and further faults.
Either way, Reviewed-by: Robin Murphy <robin.mur...@arm.com>
Signed-off-by: Tomeu Vizoso <tomeu.viz...@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) {
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