dmaengine: idxd: Set wq state to disabled in idxd_wq_disable_cleanup()

If we are calling idxd_wq_disable_cleanup(), the workqueue should be
in a disabled state. So set the workqueue state to IDXD_WQ_DISABLED so
that the state reflects that. Currently if there is a device failure,
and a software reset is attempted the workqueues will not be
re-enabled due to idxd_wq_enable() seeing that state as already being
IDXD_WQ_ENABLED.

Cc: Fenghua Yu <[email protected]>
Cc: Dave Jiang <[email protected]>
Cc: Vinod Koul <[email protected]>
Signed-off-by: Jerry Snitselaar <[email protected]>
Reviewed-by: Dave Jiang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: snits

drivers/dma/idxd/device.c

@@ -258,7 +258,6 @@ void idxd_wq_reset(struct idxd_wq *wq)
 	operand = BIT(wq->id % 16) | ((wq->id / 16) << 16);
 	idxd_cmd_exec(idxd, IDXD_CMD_RESET_WQ, operand, NULL);
 	idxd_wq_disable_cleanup(wq);
-	wq->state = IDXD_WQ_DISABLED;
 }
 
 int idxd_wq_map_portal(struct idxd_wq *wq)
@@ -378,6 +377,7 @@ static void idxd_wq_disable_cleanup(struct idxd_wq *wq)
 	struct idxd_device *idxd = wq->idxd;
 
 	lockdep_assert_held(&wq->wq_lock);
+	wq->state = IDXD_WQ_DISABLED;
 	memset(wq->wqcfg, 0, idxd->wqcfg_size);
 	wq->type = IDXD_WQT_NONE;
 	wq->threshold = 0;