dmaengine: idxd: move wq irq enabling to after device enable

Move the calling of request_irq() and other related irq setup code until
after the WQ is successfully enabled. This reduces the amount of
setup/teardown if the wq is not configured correctly and cannot be enabled.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/164642777730.179702.1880317757087484299.stgit@djiang5-desk3.ch.intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/idxd/dma.c

@@ -291,13 +291,6 @@ static int idxd_dmaengine_drv_probe(struct idxd_dev *idxd_dev)
 	mutex_lock(&wq->wq_lock);
 	wq->type = IDXD_WQT_KERNEL;
 
-	rc = idxd_wq_request_irq(wq);
-	if (rc < 0) {
-		idxd->cmd_status = IDXD_SCMD_WQ_IRQ_ERR;
-		dev_dbg(dev, "WQ %d irq setup failed: %d\n", wq->id, rc);
-		goto err_irq;
-	}
-
 	rc = __drv_enable_wq(wq);
 	if (rc < 0) {
 		dev_dbg(dev, "Enable wq %d failed: %d\n", wq->id, rc);
@@ -305,6 +298,13 @@ static int idxd_dmaengine_drv_probe(struct idxd_dev *idxd_dev)
 		goto err;
 	}
 
+	rc = idxd_wq_request_irq(wq);
+	if (rc < 0) {
+		idxd->cmd_status = IDXD_SCMD_WQ_IRQ_ERR;
+		dev_dbg(dev, "WQ %d irq setup failed: %d\n", wq->id, rc);
+		goto err_irq;
+	}
+
 	rc = idxd_wq_alloc_resources(wq);
 	if (rc < 0) {
 		idxd->cmd_status = IDXD_SCMD_WQ_RES_ALLOC_ERR;
@@ -336,10 +336,10 @@ static int idxd_dmaengine_drv_probe(struct idxd_dev *idxd_dev)
 err_ref:
 	idxd_wq_free_resources(wq);
 err_res_alloc:
-	__drv_disable_wq(wq);
-err:
 	idxd_wq_free_irq(wq);
 err_irq:
+	__drv_disable_wq(wq);
+err:
 	wq->type = IDXD_WQT_NONE;
 	mutex_unlock(&wq->wq_lock);
 	return rc;