diff options
| author | Rob Clark <robdclark@gmail.com> | 2013-11-21 20:29:51 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2013-12-18 01:43:49 +0100 |
| commit | 5d13d425eb58d28c8be6dc8bf706ca361373c3ba (patch) | |
| tree | 409cba74ae5a5b67e807fe1f163e50f6a27b0d61 /include | |
| parent | drm/edid: Make edid_load() return a void * (diff) | |
| download | linux-5d13d425eb58d28c8be6dc8bf706ca361373c3ba.tar.xz linux-5d13d425eb58d28c8be6dc8bf706ca361373c3ba.zip | |
drm: add DRM_ERROR_RATELIMITED
For error traces in situations that can run away, it is nice to have a
rate-limited version of DRM_ERROR() to avoid massive log flooding.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drmP.h | 17 |
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__) |