linux-kernel - [PATCH v2] drm/i915: load driver even if debugfs fails

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Date:	Thu, 23 Jul 2015 19:36:12 +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,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	Chris Wilson <chris@...is-wilson.co.uk>
Subject: [PATCH v2] drm/i915: load driver even if debugfs fails

debugfs files are not necessary for the usual operation of the driver
and the device. No need to check for the return values from the debugfs
file creation. Even if one debugfs file fails to create we try with the
next debugfs file and ultimately return success always so that the
driver continues to load.
cleanup will clean all the created debugfs files as the list of file
that are created are maintained in minor->debugfs_list.

Cc: Chris Wilson <chris@...is-wilson.co.uk>
Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---

v1 was drm/i915: add error path

 drivers/gpu/drm/i915/i915_debugfs.c | 31 ++++++++++++-------------------
 1 file changed, 12 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index caf1382..8b1a42a 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -5138,29 +5138,22 @@ void intel_display_crc_init(struct drm_device *dev)
 
 int i915_debugfs_init(struct drm_minor *minor)
 {
-	int ret, i;
+	int i;
 
-	ret = i915_forcewake_create(minor->debugfs_root, minor);
-	if (ret)
-		return ret;
+	i915_forcewake_create(minor->debugfs_root, minor);
 
-	for (i = 0; i < ARRAY_SIZE(i915_pipe_crc_data); i++) {
-		ret = i915_pipe_crc_create(minor->debugfs_root, minor, i);
-		if (ret)
-			return ret;
-	}
+	for (i = 0; i < ARRAY_SIZE(i915_pipe_crc_data); i++)
+		i915_pipe_crc_create(minor->debugfs_root, minor, i);
 
-	for (i = 0; i < ARRAY_SIZE(i915_debugfs_files); i++) {
-		ret = i915_debugfs_create(minor->debugfs_root, minor,
-					  i915_debugfs_files[i].name,
-					  i915_debugfs_files[i].fops);
-		if (ret)
-			return ret;
-	}
+	for (i = 0; i < ARRAY_SIZE(i915_debugfs_files); i++)
+		i915_debugfs_create(minor->debugfs_root, minor,
+				    i915_debugfs_files[i].name,
+				    i915_debugfs_files[i].fops);
+
+	drm_debugfs_create_files(i915_debugfs_list, I915_DEBUGFS_ENTRIES,
+				 minor->debugfs_root, minor);
 
-	return drm_debugfs_create_files(i915_debugfs_list,
-					I915_DEBUGFS_ENTRIES,
-					minor->debugfs_root, minor);
+	return 0;
 }
 
 void i915_debugfs_cleanup(struct drm_minor *minor)
-- 
1.8.1.2

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