1 files changed, 17 insertions, 0 deletions

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 1d4a920ef7ff..bc07c7af0f6e 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -56,6 +56,7 @@
 #include <linux/mutex.h>
 #include <linux/io.h>
 #include <linux/slab.h>
+#include <linux/ratelimit.h>
 #if defined(__alpha__) || defined(__powerpc__)
 #include <asm/pgtable.h>        /* For pte_wrprotect */
 #endif
@@ -180,6 +181,22 @@ int drm_err(const char *func, const char *format, ...);
 #define DRM_ERROR(fmt, ...)                             \
         drm_err(__func__, fmt, ##__VA_ARGS__)
 
+/**
+ * Rate limited error output.  Like DRM_ERROR() but won't flood the log.
+ *
+ * \param fmt printf() like format string.
+ * \param arg arguments
+ */
+#define DRM_ERROR_RATELIMITED(fmt, ...)                         \
+({                                                                      \
+        static DEFINE_RATELIMIT_STATE(_rs,                              \
+                                      DEFAULT_RATELIMIT_INTERVAL,       \
+                                      DEFAULT_RATELIMIT_BURST);         \
+                                                                        \
+        if (__ratelimit(&_rs))                                          \
+                drm_err(__func__, fmt, ##__VA_ARGS__);                  \
+})
+
 #define DRM_INFO(fmt, ...)                              \
         printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)