From ca8e2ad71013049bc88a10b11d83712bfe56cdd4 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Fri, 11 Apr 2014 15:23:00 +0200 Subject: drm: Introduce drm_dev_set_unique() Add a helper function that allows drivers to statically set the unique name of the device. This will allow platform and USB drivers to get rid of their DRM bus implementations and directly use drm_dev_alloc() and drm_dev_register(). Reviewed-by: Daniel Vetter Reviewed-by: David Herrmann Signed-off-by: Thierry Reding --- drivers/gpu/drm/drm_stub.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'drivers/gpu/drm/drm_stub.c') diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c index 3727ac8bc310..6d55392376dd 100644 --- a/drivers/gpu/drm/drm_stub.c +++ b/drivers/gpu/drm/drm_stub.c @@ -650,6 +650,7 @@ static void drm_dev_release(struct kref *ref) drm_minor_free(dev, DRM_MINOR_CONTROL); mutex_destroy(&dev->master_mutex); + kfree(dev->unique); kfree(dev); } @@ -777,3 +778,28 @@ void drm_dev_unregister(struct drm_device *dev) drm_minor_unregister(dev, DRM_MINOR_CONTROL); } EXPORT_SYMBOL(drm_dev_unregister); + +/** + * drm_dev_set_unique - Set the unique name of a DRM device + * @dev: device of which to set the unique name + * @fmt: format string for unique name + * + * Sets the unique name of a DRM device using the specified format string and + * a variable list of arguments. Drivers can use this at driver probe time if + * the unique name of the devices they drive is static. + * + * Return: 0 on success or a negative error code on failure. + */ +int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...) +{ + va_list ap; + + kfree(dev->unique); + + va_start(ap, fmt); + dev->unique = kvasprintf(GFP_KERNEL, fmt, ap); + va_end(ap); + + return dev->unique ? 0 : -ENOMEM; +} +EXPORT_SYMBOL(drm_dev_set_unique); -- cgit v1.2.3-55-g7522