i40e: poll on NVM semaphore only if not other error

Only poll on the NVM semaphore if there's time left on a previous
reservation.  Also, add a little more info to debug messages.

Change-ID: I2439bf870b95a28b810dcb5cca1c06440463cf8a
Signed-off-by: NShannon Nelson <shannon.nelson@intel.com>
Acked-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: NJim Young <jamesx.m.young@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_nvm.c

@@ -93,10 +93,15 @@ i40e_status i40e_acquire_nvm(struct i40e_hw *hw,
 	/* Store the timeout */
 	hw->nvm.hw_semaphore_timeout = I40E_MS_TO_GTIME(time_left) + gtime;
 
-	if (ret_code) {
+	if (ret_code)
+		i40e_debug(hw, I40E_DEBUG_NVM,
+			   "NVM acquire type %d failed time_left=%llu ret=%d aq_err=%d\n",
+			   access, time_left, ret_code, hw->aq.asq_last_status);
+
+	if (ret_code && time_left) {
 		/* Poll until the current NVM owner timeouts */
 		timeout = I40E_MS_TO_GTIME(I40E_MAX_NVM_TIMEOUT) + gtime;
-		while (gtime < timeout) {
+		while ((gtime < timeout) && time_left) {
 			usleep_range(10000, 20000);
 			gtime = rd32(hw, I40E_GLVFGEN_TIMER);
 			ret_code = i40e_aq_request_resource(hw,
@@ -112,8 +117,8 @@ i40e_status i40e_acquire_nvm(struct i40e_hw *hw,
 		if (ret_code) {
 			hw->nvm.hw_semaphore_timeout = 0;
 			i40e_debug(hw, I40E_DEBUG_NVM,
-				   "NVM acquire timed out, wait %llu ms before trying again.\n",
-				   time_left);
+				   "NVM acquire timed out, wait %llu ms before trying again. status=%d aq_err=%d\n",
+				   time_left, ret_code, hw->aq.asq_last_status);
 		}
 	}