[PATCH 1/2] ipoib: Add ratelimited version of ipoib_warn

[Nikolay Borisov <kernel-6AxghH7DbtA@public.gmane.org>]

In certain cases it's possible to be flooded by warning messages. To
cope with such situation add ratelimited version of ipoib_warn -
ipoib_warn_rl. Current implementation is done in such a way so that
various messages do not skew the flood detection of one another e.g.
each is being governed by a separate ratelimit structure.

Signed-off-by: Nikolay Borisov <kernel-6AxghH7DbtA@public.gmane.org>
---
 drivers/infiniband/ulp/ipoib/ipoib.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
index 3ede10309754..dc1bcb32b7a1 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib.h
+++ b/drivers/infiniband/ulp/ipoib/ipoib.h
@@ -763,8 +763,19 @@ static inline void ipoib_unregister_debugfs(void) { }
 
 #define ipoib_printk(level, priv, format, arg...)	\
 	printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg)
+#define ipoib_printk_warn_ratelimit(priv, fmt, args...)		\
+do {								\
+	static DEFINE_RATELIMIT_STATE(_rs,			\
+		DEFAULT_RATELIMIT_INTERVAL,			\
+		DEFAULT_RATELIMIT_BURST);			\
+	if (__ratelimit(&_rs))					\
+		ipoib_printk(KERN_WARNING, priv, fmt, ##args);	\
+} while (0)
+
 #define ipoib_warn(priv, format, arg...)		\
 	ipoib_printk(KERN_WARNING, priv, format , ## arg)
+#define ipoib_warn_rl(priv, fmt, args...)		\
+	ipoib_printk_warn_ratelimit(priv, fmt , args...)
 
 extern int ipoib_sendq_size;
 extern int ipoib_recvq_size;
-- 
2.5.0

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