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From: Jani Nikula <jani.nikula@intel.com>
To: intel-gfx@lists.freedesktop.org,
	Jeremiah Mahler <jmmahler@gmail.com>,
	weiyj_lk@163.com
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] drm/i915: release struct_mutex on the i915_gem_init_hw fail path
Date: Fri,  5 Dec 2014 14:17:42 +0200	[thread overview]
Message-ID: <1417781862-23368-2-git-send-email-jani.nikula@intel.com> (raw)
In-Reply-To: <1417781862-23368-1-git-send-email-jani.nikula@intel.com>

Release struct_mutex if init_rings() fails.

This is a regression introduced in
commit 35a57ffbb10840af219eeaf64718434242bb7c76
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Nov 20 00:33:07 2014 +0100

    drm/i915: Only init engines once

Reported-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/i915_gem.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index c1c11418231b..e3ce4bef22a3 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4860,22 +4860,18 @@ int i915_gem_init(struct drm_device *dev)
 	}
 
 	ret = i915_gem_init_userptr(dev);
-	if (ret) {
-		mutex_unlock(&dev->struct_mutex);
-		return ret;
-	}
+	if (ret)
+		goto out_unlock;
 
 	i915_gem_init_global_gtt(dev);
 
 	ret = i915_gem_context_init(dev);
-	if (ret) {
-		mutex_unlock(&dev->struct_mutex);
-		return ret;
-	}
+	if (ret)
+		goto out_unlock;
 
 	ret = dev_priv->gt.init_rings(dev);
 	if (ret)
-		return ret;
+		goto out_unlock;
 
 	ret = i915_gem_init_hw(dev);
 	if (ret == -EIO) {
@@ -4887,6 +4883,8 @@ int i915_gem_init(struct drm_device *dev)
 		atomic_set_mask(I915_WEDGED, &dev_priv->gpu_error.reset_counter);
 		ret = 0;
 	}
+
+out_unlock:
 	mutex_unlock(&dev->struct_mutex);
 
 	return ret;
-- 
2.1.3


  reply	other threads:[~2014-12-05 12:17 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-12-05  0:55 [PATCH -next] drm/i915: Fix missing unlock on error in i915_gem_init_hw() weiyj_lk
2014-12-05  1:39 ` Jeremiah Mahler
2014-12-05 12:17   ` Jani Nikula
2014-12-05 12:17   ` Jani Nikula
2014-12-05 12:17     ` Jani Nikula [this message]
2014-12-05 13:03       ` [PATCH] drm/i915: release struct_mutex on the i915_gem_init_hw fail path Jeremiah Mahler
2014-12-05 14:04         ` [Intel-gfx] " Daniel Vetter
2014-12-05 13:21 ` [Intel-gfx] [PATCH -next] drm/i915: Fix missing unlock on error in i915_gem_init_hw() Daniel Vetter

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