diff options
Diffstat (limited to 'drivers/gpu/drm/omapdrm/dss/base.c')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/dss/base.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/drivers/gpu/drm/omapdrm/dss/base.c b/drivers/gpu/drm/omapdrm/dss/base.c index 9f01a4f28145..08846eea5a53 100644 --- a/drivers/gpu/drm/omapdrm/dss/base.c +++ b/drivers/gpu/drm/omapdrm/dss/base.c @@ -91,6 +91,27 @@ static bool omapdss_device_is_registered(struct device_node *node) return found; } +struct omap_dss_device *omapdss_device_get(struct omap_dss_device *dssdev) +{ + if (!try_module_get(dssdev->owner)) + return NULL; + + if (get_device(dssdev->dev) == NULL) { + module_put(dssdev->owner); + return NULL; + } + + return dssdev; +} +EXPORT_SYMBOL(omapdss_device_get); + +void omapdss_device_put(struct omap_dss_device *dssdev) +{ + put_device(dssdev->dev); + module_put(dssdev->owner); +} +EXPORT_SYMBOL(omapdss_device_put); + struct omap_dss_device *omapdss_find_device_by_port(struct device_node *src, unsigned int port) { @@ -98,7 +119,7 @@ struct omap_dss_device *omapdss_find_device_by_port(struct device_node *src, list_for_each_entry(dssdev, &omapdss_devices_list, list) { if (dssdev->dev->of_node == src && dssdev->port_num == port) - return omap_dss_get_device(dssdev); + return omapdss_device_get(dssdev); } return NULL; @@ -147,9 +168,9 @@ struct omap_dss_device *omapdss_device_get_next(struct omap_dss_device *from, done: if (from) - omap_dss_put_device(from); + omapdss_device_put(from); if (dssdev) - omap_dss_get_device(dssdev); + omapdss_device_get(dssdev); mutex_unlock(&omapdss_devices_lock); return dssdev; |