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From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
To: Daniel Vetter <daniel.vetter@intel.com>,
	Jani Nikula <jani.nikula@linux.intel.com>,
	David Airlie <airlied@linux.ie>
Cc: linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org,
	Chris Wilson <chris@chris-wilson.co.uk>,
	Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Subject: [PATCH v2] drm/i915: remove unnecessary null test
Date: Mon, 20 Jul 2015 20:36:01 +0530	[thread overview]
Message-ID: <1437404761-2617-1-git-send-email-sudipm.mukherjee@gmail.com> (raw)

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@vectorindia.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


             reply	other threads:[~2015-07-20 15:06 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-20 15:06 Sudip Mukherjee [this message]
2015-07-20 15:33 ` [Intel-gfx] [PATCH v2] drm/i915: remove unnecessary null test Daniel Vetter
2015-07-21  6:41   ` Sudip Mukherjee
2015-07-21  7:37     ` Daniel Vetter

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