[PATCH] media: venus: protect against spurious interrupts during probe

[PATCH] media: venus: protect against spurious interrupts during probe

[Jorge Ramirez-Ortiz]

From: Jorge Ramirez-Ortiz <jorge@foundries.io>

Make sure the interrupt handler is initialized before the interrupt is
registered.

If the IRQ is registered before hfi_create(), it's possible that an
interrupt fires before the handler setup is complete, leading to a NULL
dereference.

This error condition has been observed during sytem boot on Rb3Gen2.

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez@oss.qualcomm.com>
---
 drivers/media/platform/qcom/venus/core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 77d48578ecd2..04641a7dcc98 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -424,13 +424,13 @@ static int venus_probe(struct platform_device *pdev)
 	INIT_DELAYED_WORK(&core->work, venus_sys_error_handler);
 	init_waitqueue_head(&core->sys_err_done);
 
-	ret = devm_request_threaded_irq(dev, core->irq, hfi_isr, venus_isr_thread,
-					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
-					"venus", core);
+	ret = hfi_create(core, &venus_core_ops);
 	if (ret)
 		goto err_core_put;
 
-	ret = hfi_create(core, &venus_core_ops);
+	ret = devm_request_threaded_irq(dev, core->irq, hfi_isr, venus_isr_thread,
+					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+					"venus", core);
 	if (ret)
 		goto err_core_put;
 
-- 
2.34.1