iwlwifi: check the HW when a queue is stuck

Add more information when a queue is stuck and actually get
information from the scheduler instead of looking at internal
variables.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
index a1a5833..3f2ceb2 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
@@ -1515,8 +1515,12 @@ static int iwl_trans_pcie_check_stuck_queue(struct iwl_trans *trans, int cnt)
        if (time_after(jiffies, timeout)) {
                IWL_ERR(trans, "Queue %d stuck for %u ms.\n", q->id,
                        hw_params(trans).wd_timeout);
-               IWL_ERR(trans, "Current read_ptr %d write_ptr %d\n",
+               IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
                        q->read_ptr, q->write_ptr);
+               IWL_ERR(trans, "Current HW read_ptr %d write_ptr %d\n",
+                       iwl_read_prph(bus(trans), SCD_QUEUE_RDPTR(cnt))
+                               & (TFD_QUEUE_SIZE_MAX - 1),
+                       iwl_read_prph(bus(trans), SCD_QUEUE_WRPTR(cnt)));
                return 1;
        }