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authorMarcin Slusarz <marcin.slusarz@gmail.com>2011-11-09 22:20:35 +0100
committerDave Airlie <airlied@redhat.com>2011-11-11 12:05:19 +0100
commitb3e067c0b276197b59046d7095b01b99f98b2821 (patch)
tree90a260a3a560e0f06398db84ebe3feb27d569128 /include/drm/drmP.h
parentdrm/radeon/kms: fix use of vram scratch page on evergreen/ni (diff)
downloadlinux-b3e067c0b276197b59046d7095b01b99f98b2821.tar.xz
linux-b3e067c0b276197b59046d7095b01b99f98b2821.zip
drm: serialize access to list of debugfs files
Nouveau, when configured with debugfs, creates debugfs files for every channel, so structure holding list of files needs to be protected from simultaneous changes by multiple threads. Without this patch it's possible to hit kernel oops in drm_debugfs_remove_files just by running a couple of xterms with looped glxinfo. Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to '')
-rw-r--r--include/drm/drmP.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index cf399495d38f..1f9e9516e2b7 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -990,7 +990,9 @@ struct drm_minor {
struct proc_dir_entry *proc_root; /**< proc directory entry */
struct drm_info_node proc_nodes;
struct dentry *debugfs_root;
- struct drm_info_node debugfs_nodes;
+
+ struct list_head debugfs_list;
+ struct mutex debugfs_lock; /* Protects debugfs_list. */
struct drm_master *master; /* currently active master for this node */
struct list_head master_list;