6 files changed, 130 insertions, 37 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.h b/drivers/net/wireless/iwlwifi/iwl-3945.h
index a41f0e098cf6..ecc23ec1f6a4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.h
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.h
@@ -227,7 +227,7 @@ extern void iwl3945_rx_replenish(void *data);
 extern void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq);
 extern unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
                                         struct ieee80211_hdr *hdr,int left);
-extern void iwl3945_dump_nic_event_log(struct iwl_priv *priv);
+extern void iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log);
 extern void iwl3945_dump_nic_error_log(struct iwl_priv *priv);
 
 /*
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 927131192572..9b04b25f0e57 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -1696,8 +1696,6 @@ void iwl_dump_nic_error_log(struct iwl_priv *priv)
 
 }
 
-#ifdef CONFIG_IWLWIFI_DEBUG
-
 #define EVENT_START_OFFSET  (4 * sizeof(u32))
 
 /**
@@ -1758,10 +1756,42 @@ static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 }
 
+/**
+ * iwl_print_last_event_logs - Dump the newest # of event log to syslog
+ */
+static void iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
+                                      u32 num_wraps, u32 next_entry,
+                                      u32 size, u32 mode)
+{
+        /*
+         * display the newest DEFAULT_LOG_ENTRIES entries
+         * i.e the entries just before the next ont that uCode would fill.
+         */
+        if (num_wraps) {
+                if (next_entry < size) {
+                        iwl_print_event_log(priv,
+                                        capacity - (size - next_entry),
+                                        size - next_entry, mode);
+                        iwl_print_event_log(priv, 0,
+                                    next_entry, mode);
+                } else
+                        iwl_print_event_log(priv, next_entry - size,
+                                    size, mode);
+        } else {
+                if (next_entry < size)
+                        iwl_print_event_log(priv, 0, next_entry, mode);
+                else
+                        iwl_print_event_log(priv, next_entry - size,
+                                            size, mode);
+        }
+}
+
 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
 #define MAX_EVENT_LOG_SIZE (512)
 
-void iwl_dump_nic_event_log(struct iwl_priv *priv)
+#define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
+
+void iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log)
 {
         u32 base;       /* SRAM byte address of event log header */
         u32 capacity;   /* event log capacity in # entries */
@@ -1806,19 +1836,37 @@ void iwl_dump_nic_event_log(struct iwl_priv *priv)
                 return;
         }
 
-        IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
-                        size, num_wraps);
-
-        /* if uCode has wrapped back to top of log, start at the oldest entry,
-         * i.e the next one that uCode would fill. */
-        if (num_wraps)
-                iwl_print_event_log(priv, next_entry,
-                                        capacity - next_entry, mode);
-        /* (then/else) start at top of log */
-        iwl_print_event_log(priv, 0, next_entry, mode);
+#ifdef CONFIG_IWLWIFI_DEBUG
+        if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS))
+                size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
+                        ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
+#else
+        size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
+                ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
+#endif
+        IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
+                size);
 
-}
+#ifdef CONFIG_IWLWIFI_DEBUG
+        if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
+                /*
+                 * if uCode has wrapped back to top of log,
+                 * start at the oldest entry,
+                 * i.e the next one that uCode would fill.
+                 */
+                if (num_wraps)
+                        iwl_print_event_log(priv, next_entry,
+                                            capacity - next_entry, mode);
+                /* (then/else) start at top of log */
+                iwl_print_event_log(priv, 0, next_entry, mode);
+        } else
+                iwl_print_last_event_logs(priv, capacity, num_wraps,
+                                        next_entry, size, mode);
+#else
+        iwl_print_last_event_logs(priv, capacity, num_wraps,
+                                next_entry, size, mode);
 #endif
+}
 
 /**
  * iwl_alive_start - called after REPLY_ALIVE notification received
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 2e0fb2804ad0..3629aea250ab 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -1362,11 +1362,10 @@ void iwl_irq_handle_error(struct iwl_priv *priv)
         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 
         priv->cfg->ops->lib->dump_nic_error_log(priv);
+        priv->cfg->ops->lib->dump_nic_event_log(priv, false);
 #ifdef CONFIG_IWLWIFI_DEBUG
-        if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) {
-                priv->cfg->ops->lib->dump_nic_event_log(priv);
+        if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
                 iwl_print_rx_config_cmd(priv);
-        }
 #endif
 
         wake_up_interruptible(&priv->wait_command_queue);
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index ecba0f46bac5..cf7d3df0744e 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -167,7 +167,7 @@ struct iwl_lib_ops {
         int (*is_valid_rtc_data_addr)(u32 addr);
         /* 1st ucode load */
         int (*load_ucode)(struct iwl_priv *priv);
-        void (*dump_nic_event_log)(struct iwl_priv *priv);
+        void (*dump_nic_event_log)(struct iwl_priv *priv, bool full_log);
         void (*dump_nic_error_log)(struct iwl_priv *priv);
         int (*set_channel_switch)(struct iwl_priv *priv, u16 channel);
         /* power management */
@@ -579,14 +579,10 @@ int iwl_pci_resume(struct pci_dev *pdev);
 *  Error Handling Debugging
 ******************************************************/
 void iwl_dump_nic_error_log(struct iwl_priv *priv);
+void iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log);
 #ifdef CONFIG_IWLWIFI_DEBUG
-void iwl_dump_nic_event_log(struct iwl_priv *priv);
 void iwl_print_rx_config_cmd(struct iwl_priv *priv);
 #else
-static inline void iwl_dump_nic_event_log(struct iwl_priv *priv)
-{
-}
-
 static inline void iwl_print_rx_config_cmd(struct iwl_priv *priv)
 {
 }
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 5adf0b606202..21e0f6699daf 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -436,7 +436,7 @@ static ssize_t iwl_dbgfs_log_event_write(struct file *file,
         if (sscanf(buf, "%d", &event_log_flag) != 1)
                 return -EFAULT;
         if (event_log_flag == 1)
-                priv->cfg->ops->lib->dump_nic_event_log(priv);
+                priv->cfg->ops->lib->dump_nic_event_log(priv, true);
 
         return count;
 }
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 5b7e80e5bab4..5e3c35314ffe 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -1482,7 +1482,6 @@ static inline void iwl_synchronize_irq(struct iwl_priv *priv)
         tasklet_kill(&priv->irq_tasklet);
 }
 
-#ifdef CONFIG_IWLWIFI_DEBUG
 static const char *desc_lookup(int i)
 {
         switch (i) {
@@ -1613,10 +1612,42 @@ static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
 }
 
+/**
+ * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
+ */
+static void iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
+                                      u32 num_wraps, u32 next_entry,
+                                      u32 size, u32 mode)
+{
+        /*
+         * display the newest DEFAULT_LOG_ENTRIES entries
+         * i.e the entries just before the next ont that uCode would fill.
+         */
+        if (num_wraps) {
+                if (next_entry < size) {
+                        iwl3945_print_event_log(priv,
+                                        capacity - (size - next_entry),
+                                        size - next_entry, mode);
+                        iwl3945_print_event_log(priv, 0,
+                                    next_entry, mode);
+                } else
+                        iwl3945_print_event_log(priv, next_entry - size,
+                                    size, mode);
+        } else {
+                if (next_entry < size)
+                        iwl3945_print_event_log(priv, 0, next_entry, mode);
+                else
+                        iwl3945_print_event_log(priv, next_entry - size,
+                                            size, mode);
+        }
+}
+
 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
 #define IWL3945_MAX_EVENT_LOG_SIZE (512)
 
-void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
+#define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
+
+void iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log)
 {
         u32 base;       /* SRAM byte address of event log header */
         u32 capacity;   /* event log capacity in # entries */
@@ -1657,8 +1688,17 @@ void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
                 return;
         }
 
-        IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
-                  size, num_wraps);
+#ifdef CONFIG_IWLWIFI_DEBUG
+        if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS))
+                size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
+                        ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
+#else
+        size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
+                ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
+#endif
+
+        IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
+                  size);
 
         /* if uCode has wrapped back to top of log, start at the oldest entry,
          * i.e the next one that uCode would fill. */
@@ -1669,18 +1709,28 @@ void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
         /* (then/else) start at top of log */
         iwl3945_print_event_log(priv, 0, next_entry, mode);
 
-}
+#ifdef CONFIG_IWLWIFI_DEBUG
+        if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
+                /* if uCode has wrapped back to top of log,
+                 * start at the oldest entry,
+                 * i.e the next one that uCode would fill.
+                 */
+                if (num_wraps)
+                        iwl3945_print_event_log(priv, next_entry,
+                                    capacity - next_entry, mode);
+
+                /* (then/else) start at top of log */
+                iwl3945_print_event_log(priv, 0, next_entry, mode);
+        } else
+                iwl3945_print_last_event_logs(priv, capacity, num_wraps,
+                                        next_entry, size, mode);
 #else
-void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
-{
-}
+        iwl3945_print_last_event_logs(priv, capacity, num_wraps,
+                                next_entry, size, mode);
+#endif
 
-void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
-{
 }
 
-#endif
-
 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
 {
         u32 inta, handled = 0;