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Commit 4eb9b945 authored by Daniel Vetter's avatar Daniel Vetter
Browse files

drm/sysfs: Annote lockless show functions with READ_ONCE 



For documentation and paranoia.

Acked-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1459331120-27864-4-git-send-email-daniel.vetter@ffwll.ch
parent 5ff18e42

drivers/gpu/drm/drm_sysfs.c

+8 −3
Original line number Diff line number Diff line
@@ -208,9 +208,12 @@ static ssize_t status_show(struct device *device, 
			   char *buf)

{

	struct drm_connector *connector = to_drm_connector(device);

	enum drm_connector_status status;



	status = READ_ONCE(connector->status);



	return snprintf(buf, PAGE_SIZE, "%s\n",

			drm_get_connector_status_name(connector->status));

			drm_get_connector_status_name(status));

}



static ssize_t dpms_show(struct device *device,
@@ -231,9 +234,11 @@ static ssize_t enabled_show(struct device *device, 
			   char *buf)

{

	struct drm_connector *connector = to_drm_connector(device);

	bool enabled;



	enabled = READ_ONCE(connector->encoder);



	return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" :

			"disabled");

	return snprintf(buf, PAGE_SIZE, enabled ? "enabled\n" : "disabled\n");

}



static ssize_t edid_show(struct file *filp, struct kobject *kobj,