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drm/sysfs: protect sysfs removal code against being run twice.

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a step towards correct hot unplug for USB devices, we need to
remove the userspace facing bits at the unplug time for correct
udev operation.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2012-02-20 14:15:02 +00:00
parent ce880cb860
commit 1828fe6c5f
1 changed files with 6 additions and 1 deletions
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5
drivers/gpu/drm/drm_sysfs.c
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@ -454,6 +454,8 @@ void drm_sysfs_connector_remove(struct drm_connector *connector)
{ {
int i; int i;
if (!connector->kdev.parent)
return;
DRM_DEBUG("removing \"%s\" from sysfs\n", DRM_DEBUG("removing \"%s\" from sysfs\n",
drm_get_connector_name(connector)); drm_get_connector_name(connector));
@ -461,6 +463,7 @@ void drm_sysfs_connector_remove(struct drm_connector *connector)
device_remove_file(&connector->kdev, &connector_attrs[i]); device_remove_file(&connector->kdev, &connector_attrs[i]);
sysfs_remove_bin_file(&connector->kdev.kobj, &edid_attr); sysfs_remove_bin_file(&connector->kdev.kobj, &edid_attr);
device_unregister(&connector->kdev); device_unregister(&connector->kdev);
connector->kdev.parent = NULL;
} }
EXPORT_SYMBOL(drm_sysfs_connector_remove); EXPORT_SYMBOL(drm_sysfs_connector_remove);
@ -533,7 +536,9 @@ err_out:
*/ */
void drm_sysfs_device_remove(struct drm_minor *minor) void drm_sysfs_device_remove(struct drm_minor *minor)
{ {
if (minor->kdev.parent)
device_unregister(&minor->kdev); device_unregister(&minor->kdev);
minor->kdev.parent = NULL;
} }