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From: Archit Taneja <architt@codeaurora.org>
To: robdclark@gmail.com
Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: [PATCH] drm/msm: Remove bad calls to of_node_put()
Date: Thu, 17 Nov 2016 12:12:03 +0530	[thread overview]
Message-ID: <1479364923-15757-1-git-send-email-architt@codeaurora.org> (raw)

In add_components_mdp, we parse the endpoints in MDP output ports
using the helper for_each_endpoint_of_node(). Our function calls
of_node_put() on the endpoint node before we iterate over the
next one. This is already done by the helper, and results in
trying to decrement the refcount twice.

Remove the extra of_node_put calls. This fixes warnings seen when
we try to insert the driver as a module on IFC6410.

Reported-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/msm/msm_drv.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 46568fc..5cabe1b 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -903,10 +903,8 @@ static int add_components_mdp(struct device *mdp_dev,
 		 * remote-endpoint isn't a component that we need to add
 		 */
 		if (of_device_is_compatible(np, "qcom,mdp4") &&
-		    ep.port == 0) {
-			of_node_put(ep_node);
+		    ep.port == 0)
 			continue;
-		}
 
 		/*
 		 * It's okay if some of the ports don't have a remote endpoint
@@ -914,15 +912,12 @@ static int add_components_mdp(struct device *mdp_dev,
 		 * any external interface.
 		 */
 		intf = of_graph_get_remote_port_parent(ep_node);
-		if (!intf) {
-			of_node_put(ep_node);
+		if (!intf)
 			continue;
-		}
 
 		component_match_add(master_dev, matchptr, compare_of, intf);
 
 		of_node_put(intf);
-		of_node_put(ep_node);
 	}
 
 	return 0;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

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             reply	other threads:[~2016-11-17  6:42 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-17  6:42 Archit Taneja [this message]
2016-11-18 22:04 ` [PATCH] drm/msm: Remove bad calls to of_node_put() Rob Clark

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