RDMA/bnxt_re: Correct the sequence of device suspend

When in fatal error condition, mark device as detached first
and then complete all pending HWRM commands as firmware is not
going to process them and eventually time out. Move the device
to error only if suspend is called when device is in Fatal state.

Also, remove some outdated comments. Remove the stop_irq call
which is no longer required.

Fixes: cc5b9b4 ("RDMA/bnxt_re: Recover the device when FW error is detected")
Signed-off-by: Kalesh AP <[email protected]>
Signed-off-by: Selvin Xavier <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Leon Romanovsky <[email protected]>

Author: Kalesh AP

drivers/infiniband/hw/bnxt_re/main.c

@@ -2347,30 +2347,19 @@ static int bnxt_re_suspend(struct auxiliary_device *adev, pm_message_t state)
 	rdev = en_info->rdev;
 	en_dev = en_info->en_dev;
 	mutex_lock(&bnxt_re_mutex);
-	/* L2 driver may invoke this callback during device error/crash or device
-	 * reset. Current RoCE driver doesn't recover the device in case of
-	 * error. Handle the error by dispatching fatal events to all qps
-	 * ie. by calling bnxt_re_dev_stop and release the MSIx vectors as
-	 * L2 driver want to modify the MSIx table.
-	 */
 
 	ibdev_info(&rdev->ibdev, "Handle device suspend call");
 	/* Check the current device state from bnxt_en_dev and move the
 	 * device to detached state if FW_FATAL_COND is set.
 	 * This prevents more commands to HW during clean-up,
 	 * in case the device is already in error.
 	 */
-	if (test_bit(BNXT_STATE_FW_FATAL_COND, &rdev->en_dev->en_state))
+	if (test_bit(BNXT_STATE_FW_FATAL_COND, &rdev->en_dev->en_state)) {
 		set_bit(ERR_DEVICE_DETACHED, &rdev->rcfw.cmdq.flags);
-
-	bnxt_re_dev_stop(rdev);
-	bnxt_re_stop_irq(adev);
-	/* Move the device states to detached and  avoid sending any more
-	 * commands to HW
-	 */
-	set_bit(BNXT_RE_FLAG_ERR_DEVICE_DETACHED, &rdev->flags);
-	set_bit(ERR_DEVICE_DETACHED, &rdev->rcfw.cmdq.flags);
-	wake_up_all(&rdev->rcfw.cmdq.waitq);
+		set_bit(BNXT_RE_FLAG_ERR_DEVICE_DETACHED, &rdev->flags);
+		wake_up_all(&rdev->rcfw.cmdq.waitq);
+		bnxt_re_dev_stop(rdev);
+	}
 
 	if (rdev->pacing.dbr_pacing)
 		bnxt_re_set_pacing_dev_state(rdev);
@@ -2392,13 +2381,6 @@ static int bnxt_re_resume(struct auxiliary_device *adev)
 		return 0;
 
 	mutex_lock(&bnxt_re_mutex);
-	/* L2 driver may invoke this callback during device recovery, resume.
-	 * reset. Current RoCE driver doesn't recover the device in case of
-	 * error. Handle the error by dispatching fatal events to all qps
-	 * ie. by calling bnxt_re_dev_stop and release the MSIx vectors as
-	 * L2 driver want to modify the MSIx table.
-	 */
-
 	bnxt_re_add_device(adev, BNXT_RE_POST_RECOVERY_INIT);
 	rdev = en_info->rdev;
 	ibdev_info(&rdev->ibdev, "Device resume completed");