[PATCH] dmaengine: idxd: make idxd_wq_enable() return 0 if wq is already enabled

[Dave Jiang <dave.jiang@xxxxxxxxx>]

When calling idxd_wq_enable() and wq is already enabled, code should return 0
and indicate function is successful instead of return error code and fail.
This should also put idxd_wq_enable() in sync with idxd_wq_disable() where
it returns 0 if wq is already disabled.

Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
---
 drivers/dma/idxd/device.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 22ad9ee383e2..93cbfd726904 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -184,7 +184,7 @@ int idxd_wq_enable(struct idxd_wq *wq)
 
 	if (wq->state == IDXD_WQ_ENABLED) {
 		dev_dbg(dev, "WQ %d already enabled\n", wq->id);
-		return -ENXIO;
+		return 0;
 	}
 
 	idxd_cmd_exec(idxd, IDXD_CMD_ENABLE_WQ, wq->id, &status);