linux-kernel - [PATCH 4.19 270/276] drm/v3d: Handle errors from IRQ setup.

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Date:   Wed, 29 May 2019 20:07:08 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Eric Anholt <eric@...olt.net>,
        Dave Emett <david.emett@...adcom.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 270/276] drm/v3d: Handle errors from IRQ setup.

[ Upstream commit fc22771547e7e8a63679f0218e943d72b107de65 ]

Noted in review by Dave Emett for V3D 4.2 support.

Signed-off-by: Eric Anholt <eric@...olt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190308174336.7866-1-eric@anholt.net
Reviewed-by: Dave Emett <david.emett@...adcom.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/v3d/v3d_drv.c |  8 ++++++--
 drivers/gpu/drm/v3d/v3d_drv.h |  2 +-
 drivers/gpu/drm/v3d/v3d_irq.c | 13 +++++++++++--
 3 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
index 2a85fa68ffea5..2a4c6187e675f 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.c
+++ b/drivers/gpu/drm/v3d/v3d_drv.c
@@ -305,14 +305,18 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
 	if (ret)
 		goto dev_destroy;
 
-	v3d_irq_init(v3d);
+	ret = v3d_irq_init(v3d);
+	if (ret)
+		goto gem_destroy;
 
 	ret = drm_dev_register(drm, 0);
 	if (ret)
-		goto gem_destroy;
+		goto irq_disable;
 
 	return 0;
 
+irq_disable:
+	v3d_irq_disable(v3d);
 gem_destroy:
 	v3d_gem_destroy(drm);
 dev_destroy:
diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
index e6fed696ad869..0ad73f4b7509a 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.h
+++ b/drivers/gpu/drm/v3d/v3d_drv.h
@@ -284,7 +284,7 @@ void v3d_invalidate_caches(struct v3d_dev *v3d);
 void v3d_flush_caches(struct v3d_dev *v3d);
 
 /* v3d_irq.c */
-void v3d_irq_init(struct v3d_dev *v3d);
+int v3d_irq_init(struct v3d_dev *v3d);
 void v3d_irq_enable(struct v3d_dev *v3d);
 void v3d_irq_disable(struct v3d_dev *v3d);
 void v3d_irq_reset(struct v3d_dev *v3d);
diff --git a/drivers/gpu/drm/v3d/v3d_irq.c b/drivers/gpu/drm/v3d/v3d_irq.c
index e07514eb11b51..22be0f2dff99c 100644
--- a/drivers/gpu/drm/v3d/v3d_irq.c
+++ b/drivers/gpu/drm/v3d/v3d_irq.c
@@ -137,7 +137,7 @@ v3d_hub_irq(int irq, void *arg)
 	return status;
 }
 
-void
+int
 v3d_irq_init(struct v3d_dev *v3d)
 {
 	int ret, core;
@@ -154,13 +154,22 @@ v3d_irq_init(struct v3d_dev *v3d)
 	ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 0),
 			       v3d_hub_irq, IRQF_SHARED,
 			       "v3d_hub", v3d);
+	if (ret)
+		goto fail;
+
 	ret = devm_request_irq(v3d->dev, platform_get_irq(v3d->pdev, 1),
 			       v3d_irq, IRQF_SHARED,
 			       "v3d_core0", v3d);
 	if (ret)
-		dev_err(v3d->dev, "IRQ setup failed: %d\n", ret);
+		goto fail;
 
 	v3d_irq_enable(v3d);
+	return 0;
+
+fail:
+	if (ret != -EPROBE_DEFER)
+		dev_err(v3d->dev, "IRQ setup failed: %d\n", ret);
+	return ret;
 }
 
 void
-- 
2.20.1