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iwlwifi: allow rate-limited error messages

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Sometimes we might want to have an error message for something
related to TX/RX, but if that somehow happens frequently it'll
overwhelm the logs. Add IWL_ERR_LIMIT() to alleviate that by
rate-limiting those messages.

To do this, rework __iwl_err() a bit to have a mode argument
instead of passing yet another (bool) argument to it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211017162352.2cb1e6b75672.Iec5b1c1bcc6ebc87c586921a6c5c2a937f49e83c@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Johannes Berg 2021-10-17 16:26:03 +03:00 • committed by Luca Coelho
parent 6b1259d104
commit e5f1cc98cc
3 changed files with 40 additions and 16 deletions
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11
drivers/net/wireless/intel/iwlwifi/dvm/agn.h
View file

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/*
* Copyright (C) 2005-2014 Intel Corporation
* Copyright (C) 2005-2014, 2021 Intel Corporation
*/
#ifndef __iwl_agn_h__
#define __iwl_agn_h__
@ -398,8 +398,10 @@ do { \
if (!iwl_is_rfkill((m))) \
IWL_ERR(m, fmt, ##args); \
else \
__iwl_err((m)->dev, true, \
!iwl_have_debug_level(IWL_DL_RADIO), \
__iwl_err((m)->dev, \
iwl_have_debug_level(IWL_DL_RADIO) ? \
IWL_ERR_MODE_RFKILL : \
IWL_ERR_MODE_TRACE_ONLY, \
fmt, ##args); \
} while (0)
#else
@ -408,7 +410,8 @@ do { \
if (!iwl_is_rfkill((m))) \
IWL_ERR(m, fmt, ##args); \
else \
__iwl_err((m)->dev, true, true, fmt, ##args); \
__iwl_err((m)->dev, IWL_ERR_MODE_TRACE_ONLY, \
fmt, ##args); \
} while (0)
#endif /* CONFIG_IWLWIFI_DEBUG */

24
drivers/net/wireless/intel/iwlwifi/iwl-debug.c
View file

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2005-2011 Intel Corporation
* Copyright (C) 2005-2011, 2021 Intel Corporation
*/
#include <linux/device.h>
#include <linux/interrupt.h>
@ -31,21 +31,31 @@ IWL_EXPORT_SYMBOL(__iwl_info);
__iwl_fn(crit)
IWL_EXPORT_SYMBOL(__iwl_crit);
void __iwl_err(struct device *dev, bool rfkill_prefix, bool trace_only,
const char *fmt, ...)
void __iwl_err(struct device *dev, enum iwl_err_mode mode, const char *fmt, ...)
{
struct va_format vaf = {
.fmt = fmt,
};
va_list args;
va_list args, args2;
va_start(args, fmt);
vaf.va = &args;
if (!trace_only) {
if (rfkill_prefix)
switch (mode) {
case IWL_ERR_MODE_RATELIMIT:
if (net_ratelimit())
break;
fallthrough;
case IWL_ERR_MODE_REGULAR:
case IWL_ERR_MODE_RFKILL:
va_copy(args2, args);
vaf.va = &args2;
if (mode == IWL_ERR_MODE_RFKILL)
dev_err(dev, "(RFKILL) %pV", &vaf);
else
dev_err(dev, "%pV", &vaf);
va_end(args2);
break;
default:
break;
}
trace_iwlwifi_err(&vaf);
va_end(args);

21
drivers/net/wireless/intel/iwlwifi/iwl-debug.h
View file

@ -2,7 +2,7 @@
/******************************************************************************
*
* Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2018 - 2020 Intel Corporation
* Copyright(c) 2018 - 2021 Intel Corporation
*
* Portions of this file are derived from the ipw3945 project.
*****************************************************************************/
@ -22,9 +22,16 @@ static inline bool iwl_have_debug_level(u32 level)
#endif
}
enum iwl_err_mode {
IWL_ERR_MODE_REGULAR,
IWL_ERR_MODE_RFKILL,
IWL_ERR_MODE_TRACE_ONLY,
IWL_ERR_MODE_RATELIMIT,
};
struct device;
void __iwl_err(struct device *dev, bool rfkill_prefix, bool only_trace,
const char *fmt, ...) __printf(4, 5);
void __iwl_err(struct device *dev, enum iwl_err_mode mode, const char *fmt, ...)
__printf(3, 4);
void __iwl_warn(struct device *dev, const char *fmt, ...) __printf(2, 3);
void __iwl_info(struct device *dev, const char *fmt, ...) __printf(2, 3);
void __iwl_crit(struct device *dev, const char *fmt, ...) __printf(2, 3);
@ -33,13 +40,17 @@ void __iwl_crit(struct device *dev, const char *fmt, ...) __printf(2, 3);
#define CHECK_FOR_NEWLINE(f) BUILD_BUG_ON(f[sizeof(f) - 2] != '\n')
/* No matter what is m (priv, bus, trans), this will work */
#define IWL_ERR_DEV(d, f, a...) \
#define __IWL_ERR_DEV(d, mode, f, a...) \
do { \
CHECK_FOR_NEWLINE(f); \
__iwl_err((d), false, false, f, ## a); \
__iwl_err((d), mode, f, ## a); \
} while (0)
#define IWL_ERR_DEV(d, f, a...) \
__IWL_ERR_DEV(d, IWL_ERR_MODE_REGULAR, f, ## a)
#define IWL_ERR(m, f, a...) \
IWL_ERR_DEV((m)->dev, f, ## a)
#define IWL_ERR_LIMIT(m, f, a...) \
__IWL_ERR_DEV((m)->dev, IWL_ERR_MODE_RATELIMIT, f, ## a)
#define IWL_WARN(m, f, a...) \
do { \
CHECK_FOR_NEWLINE(f); \