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From: Kangjie Lu <kjlu@umn.edu>
To: kjlu@umn.edu
Cc: pakki001@umn.edu, Eric Anholt <eric@anholt.net>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH] gpu: v3d: fix a missing check of pm_runtime_get_sync
Date: Sun, 24 Mar 2019 18:16:02 -0500	[thread overview]
Message-ID: <20190324231602.2436-1-kjlu@umn.edu> (raw)

pm_runtime_get_sync could fail and thus deserves a check.

The patch adds such a check and return its error code upstream
if it indeed failed.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
---
 drivers/gpu/drm/v3d/v3d_drv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
index f0afcec72c34..99daad11fac2 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.c
+++ b/drivers/gpu/drm/v3d/v3d_drv.c
@@ -101,6 +101,8 @@ static int v3d_get_param_ioctl(struct drm_device *dev, void *data,
 			return -EINVAL;
 
 		ret = pm_runtime_get_sync(v3d->dev);
+		if (ret < 0)
+			return ret;
 		if (args->param >= DRM_V3D_PARAM_V3D_CORE0_IDENT0 &&
 		    args->param <= DRM_V3D_PARAM_V3D_CORE0_IDENT2) {
 			args->value = V3D_CORE_READ(0, offset);
-- 
2.17.1


             reply	other threads:[~2019-03-24 23:16 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-24 23:16 Kangjie Lu [this message]
2019-03-25  6:41 ` [PATCH] gpu: v3d: fix a missing check of pm_runtime_get_sync Mukesh Ojha
2019-03-27 15:09 ` Mukesh Ojha
2019-04-01 17:49 ` Eric Anholt
2019-04-01 17:49   ` Eric Anholt

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