linux-kernel - [PATCH] drm/irq: Add irq as false detection

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Message-ID: <1604315990-56787-1-git-send-email-tiantao6@hisilicon.com>
Date:   Mon, 2 Nov 2020 19:19:50 +0800
From:   Tian Tao <tiantao6@...ilicon.com>
To:     <maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
        <tzimmermann@...e.de>, <airlied@...ux.ie>, <daniel@...ll.ch>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] drm/irq: Add irq as false detection

Add the detection of false for irq, so that the EINVAL is not
returned when dev->irq_enabled is false.

Signed-off-by: Tian Tao <tiantao6@...ilicon.com>
---
 drivers/gpu/drm/drm_irq.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 09d6e9e..7537a3d 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -172,6 +172,9 @@ int drm_irq_uninstall(struct drm_device *dev)
 	bool irq_enabled;
 	int i;
 
+	if (!dev->irq_enabled || !dev)
+		return 0;
+
 	irq_enabled = dev->irq_enabled;
 	dev->irq_enabled = false;
 
-- 
2.7.4