iwlwifi: print contents of control register when error occurs

hopefully the register contents will guide us to why this failure occured

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-io.h b/drivers/net/wireless/iwlwifi/iwl-io.h
index c7b8e5bb4e42..083ea1ffbe87 100644
--- a/drivers/net/wireless/iwlwifi/iwl-io.h
+++ b/drivers/net/wireless/iwlwifi/iwl-io.h
@@ -156,6 +156,7 @@ static inline void __iwl_clear_bit(const char *f, u32 l,
 static inline int _iwl_grab_nic_access(struct iwl_priv *priv)
 {
         int ret;
+        u32 val;
 #ifdef CONFIG_IWLWIFI_DEBUG
         if (atomic_read(&priv->restrict_refcnt))
                 return 0;
@@ -167,7 +168,8 @@ static inline int _iwl_grab_nic_access(struct iwl_priv *priv)
                            (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
                             CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
         if (ret < 0) {
-                IWL_ERR(priv, "MAC is in deep sleep!\n");
+                val = _iwl_read32(priv, CSR_GP_CNTRL);
+                IWL_ERR(priv, "MAC is in deep sleep!.  CSR_GP_CNTRL = 0x%08X\n", val);
                 return -EIO;
         }