panthor_xxx_irq_suspend() doesn't mask the interrupts if drm_dev_unplug()
has been called, which is always the case when our panthor_xxx_unplug()
helpers are called. Fix that by introducing a panthor_xxx_unplug() helper
that does what panthor_xxx_irq_suspend() except it does it
unconditionally.
v2:
- Add Steve's R-b
Fixes: 5fe909cae118 ("drm/panthor: Add the device logical block")
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Reviewed-by: Steven Price <steven.price@xxxxxxx>
---
Found inadvertently while debugging another issue. I guess I managed to
call rmmod during a PING and that led to the FW interrupt handler
being executed after the device suspend happened.
---
drivers/gpu/drm/panthor/panthor_device.h | 8 ++++++++
drivers/gpu/drm/panthor/panthor_fw.c | 2 +-
drivers/gpu/drm/panthor/panthor_gpu.c | 2 +-
drivers/gpu/drm/panthor/panthor_mmu.c | 2 +-
4 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/panthor/panthor_device.h b/drivers/gpu/drm/panthor/panthor_device.h
index 3a930a368ae1..5634e9490c7f 100644
--- a/drivers/gpu/drm/panthor/panthor_device.h
+++ b/drivers/gpu/drm/panthor/panthor_device.h
@@ -321,6 +321,14 @@ static irqreturn_t panthor_ ## __name ## _irq_threaded_handler(int irq, void *da
return ret; \
} \
\
+static inline void panthor_ ## __name ## _irq_unplug(struct panthor_irq *pirq) \
+{ \
+ pirq->mask = 0; \
+ gpu_write(pirq->ptdev, __reg_prefix ## _INT_MASK, 0); \
+ synchronize_irq(pirq->irq); \
+ atomic_set(&pirq->suspended, true); \
+} \
+ \
static inline void panthor_ ## __name ## _irq_suspend(struct panthor_irq *pirq) \
{ \
int cookie; \
diff --git a/drivers/gpu/drm/panthor/panthor_fw.c b/drivers/gpu/drm/panthor/panthor_fw.c
index 33c87a59834e..7a9710a38c5f 100644
--- a/drivers/gpu/drm/panthor/panthor_fw.c
+++ b/drivers/gpu/drm/panthor/panthor_fw.c
@@ -1128,7 +1128,7 @@ void panthor_fw_unplug(struct panthor_device *ptdev)
/* Make sure the IRQ handler can be called after that point. */
if (ptdev->fw->irq.irq)
- panthor_job_irq_suspend(&ptdev->fw->irq);
+ panthor_job_irq_unplug(&ptdev->fw->irq);
panthor_fw_stop(ptdev);
diff --git a/drivers/gpu/drm/panthor/panthor_gpu.c b/drivers/gpu/drm/panthor/panthor_gpu.c
index 6dbbc4cfbe7e..b84c5b650fd9 100644
--- a/drivers/gpu/drm/panthor/panthor_gpu.c
+++ b/drivers/gpu/drm/panthor/panthor_gpu.c
@@ -174,7 +174,7 @@ void panthor_gpu_unplug(struct panthor_device *ptdev)
unsigned long flags;
/* Make sure the IRQ handler is not running after that point. */
- panthor_gpu_irq_suspend(&ptdev->gpu->irq);
+ panthor_gpu_irq_unplug(&ptdev->gpu->irq);
/* Wake-up all waiters. */
spin_lock_irqsave(&ptdev->gpu->reqs_lock, flags);
diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/panthor/panthor_mmu.c
index fdd35249169f..1f333cdded0f 100644
--- a/drivers/gpu/drm/panthor/panthor_mmu.c
+++ b/drivers/gpu/drm/panthor/panthor_mmu.c
@@ -2622,7 +2622,7 @@ int panthor_vm_prepare_mapped_bos_resvs(struct drm_exec *exec, struct panthor_vm
*/
void panthor_mmu_unplug(struct panthor_device *ptdev)
{
- panthor_mmu_irq_suspend(&ptdev->mmu->irq);
+ panthor_mmu_irq_unplug(&ptdev->mmu->irq);
mutex_lock(&ptdev->mmu->as.slots_lock);
for (u32 i = 0; i < ARRAY_SIZE(ptdev->mmu->as.slots); i++) {
--
2.44.0
