drm/tegra: dpaux: move to use request_irq by IRQF_NO_AUTOEN flag

Commit Message

tiantao (H) March 17, 2021, 6:26 a.m. UTC

disable_irq() after request_irq() still has a time gap in which
interrupts can come. request_irq() with IRQF_NO_AUTOEN flag will
disable IRQ auto-enable because of requesting.

Signed-off-by: Tian Tao <[e-mail]>
---
 drivers/gpu/drm/tegra/dpaux.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

Patch

diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c
index 105fb9c..0acaf66 100644
--- a/drivers/gpu/drm/tegra/dpaux.c
+++ b/drivers/gpu/drm/tegra/dpaux.c
@@ -521,7 +521,8 @@  static int tegra_dpaux_probe(struct platform_device *pdev)
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_get_sync(&pdev->dev);
 
-	err = devm_request_irq(dpaux->dev, dpaux->irq, tegra_dpaux_irq, 0,
+	err = devm_request_irq(dpaux->dev, dpaux->irq, tegra_dpaux_irq,
+			       IRQF_NO_AUTOEN,
 			       dev_name(dpaux->dev), dpaux);
 	if (err < 0) {
 		dev_err(dpaux->dev, "failed to request IRQ#%u: %d\n",
@@ -529,8 +530,6 @@  static int tegra_dpaux_probe(struct platform_device *pdev)
 		return err;
 	}
 
-	disable_irq(dpaux->irq);
-
 	dpaux->aux.transfer = tegra_dpaux_transfer;
 	dpaux->aux.dev = &pdev->dev;