iwmc3200wifi: Add a last_fw_err debugfs entry

In order to check what was the last fw error we got accross resets, we add
this debugfs entry. It displays the complete ASSERT information.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwmc3200wifi/main.c b/drivers/net/wireless/iwmc3200wifi/main.c
index 6a5b76acb645..d668e4756324 100644
--- a/drivers/net/wireless/iwmc3200wifi/main.c
+++ b/drivers/net/wireless/iwmc3200wifi/main.c
@@ -260,6 +260,11 @@ int iwm_priv_init(struct iwm_priv *iwm)
         iwm->watchdog.data = (unsigned long)iwm;
         mutex_init(&iwm->mutex);
 
+        iwm->last_fw_err = kzalloc(sizeof(struct iwm_fw_error_hdr),
+                                   GFP_KERNEL);
+        if (iwm->last_fw_err == NULL)
+                return -ENOMEM;
+
         return 0;
 }
 
@@ -271,6 +276,7 @@ void iwm_priv_deinit(struct iwm_priv *iwm)
                 destroy_workqueue(iwm->txq[i].wq);
 
         destroy_workqueue(iwm->rx_wq);
+        kfree(iwm->last_fw_err);
 }
 
 /*