linux-kernel - [PATCH v2 1/5] drm/imx: Use IRQF_NO_AUTOEN flag in request

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Message-ID: <20240912083020.3720233-2-ruanjinjie@huawei.com>
Date: Thu, 12 Sep 2024 16:30:16 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: <laurentiu.palcu@....nxp.com>, <l.stach@...gutronix.de>,
	<maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
	<tzimmermann@...e.de>, <airlied@...il.com>, <daniel@...ll.ch>,
	<shawnguo@...nel.org>, <s.hauer@...gutronix.de>, <kernel@...gutronix.de>,
	<festevam@...il.com>, <p.zabel@...gutronix.de>, <robdclark@...il.com>,
	<sean@...rly.run>, <konradybcio@...nel.org>, <quic_abhinavk@...cinc.com>,
	<dmitry.baryshkov@...aro.org>, <marijn.suijten@...ainline.org>,
	<thierry.reding@...il.com>, <mperttunen@...dia.com>, <jonathanh@...dia.com>,
	<agx@...xcpu.org>, <gregkh@...uxfoundation.org>, <jordan@...micpenguin.net>,
	<dri-devel@...ts.freedesktop.org>, <imx@...ts.linux.dev>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-msm@...r.kernel.org>, <freedreno@...ts.freedesktop.org>,
	<linux-tegra@...r.kernel.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH v2 1/5] drm/imx: Use IRQF_NO_AUTOEN flag in request_irq()

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 when request IRQ.

Fixes: 9021c317b770 ("drm/imx: Add initial support for DCSS on iMX8MQ")
Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
v2:
- Update the commit subject.
---
 drivers/gpu/drm/imx/dcss/dcss-crtc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/imx/dcss/dcss-crtc.c b/drivers/gpu/drm/imx/dcss/dcss-crtc.c
index 31267c00782f..af91e45b5d13 100644
--- a/drivers/gpu/drm/imx/dcss/dcss-crtc.c
+++ b/drivers/gpu/drm/imx/dcss/dcss-crtc.c
@@ -206,15 +206,13 @@ int dcss_crtc_init(struct dcss_crtc *crtc, struct drm_device *drm)
 	if (crtc->irq < 0)
 		return crtc->irq;
 
-	ret = request_irq(crtc->irq, dcss_crtc_irq_handler,
-			  0, "dcss_drm", crtc);
+	ret = request_irq(crtc->irq, dcss_crtc_irq_handler, IRQF_NO_AUTOEN,
+			  "dcss_drm", crtc);
 	if (ret) {
 		dev_err(dcss->dev, "irq request failed with %d.\n", ret);
 		return ret;
 	}
 
-	disable_irq(crtc->irq);
-
 	return 0;
 }
 
-- 
2.34.1