linux-kernel - [PATCH v2] drm/i915: remove unnecessary null test

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Date:	Mon, 20 Jul 2015 20:36:01 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Daniel Vetter <daniel.vetter@...el.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	David Airlie <airlied@...ux.ie>
Cc:	linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH v2] drm/i915: remove unnecessary null test

While creating the debugfs file we are setting the inode->i_private to
dev. That same dev is passed to these functions as private of struct
seq_file via single_open(). So at this point it can never be NULL.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---

v1 was drm/i915: fix possible null pointer dereference

 drivers/gpu/drm/i915/i915_debugfs.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index bc817da..63cb886 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4103,9 +4103,6 @@ static int i915_displayport_test_active_show(struct seq_file *m, void *data)
 	struct list_head *connector_list = &dev->mode_config.connector_list;
 	struct intel_dp *intel_dp;
 
-	if (!dev)
-		return -ENODEV;
-
 	list_for_each_entry(connector, connector_list, head) {
 
 		if (connector->connector_type !=
@@ -4150,9 +4147,6 @@ static int i915_displayport_test_data_show(struct seq_file *m, void *data)
 	struct list_head *connector_list = &dev->mode_config.connector_list;
 	struct intel_dp *intel_dp;
 
-	if (!dev)
-		return -ENODEV;
-
 	list_for_each_entry(connector, connector_list, head) {
 
 		if (connector->connector_type !=
@@ -4192,9 +4186,6 @@ static int i915_displayport_test_type_show(struct seq_file *m, void *data)
 	struct list_head *connector_list = &dev->mode_config.connector_list;
 	struct intel_dp *intel_dp;
 
-	if (!dev)
-		return -ENODEV;
-
 	list_for_each_entry(connector, connector_list, head) {
 
 		if (connector->connector_type !=
-- 
1.8.1.2

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