dmaengine: idxd: restore traffic class defaults after wq reset

When clearing the group configurations, the driver fails to restore the default setting for DSA 1.x based devices. Add defaults in idxd_groups_clear_state() for traffic class configuration. Fixes: ade8a86 ("dmaengine: idxd: Set defaults for GRPCFG traffic class") Reported-by: Binuraj Ravindran <[email protected]> Signed-off-by: Dave Jiang <[email protected]> Link: https://lore.kernel.org/r/164304123369.824298.6952463420266592087.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul <[email protected]>
josf · Feb 15, 2022 · ea7c8f5 · ea7c8f5
1 parent 7326bf8
commit ea7c8f5
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
@@ -681,8 +681,13 @@ static void idxd_groups_clear_state(struct idxd_device *idxd)
 		group->use_rdbuf_limit = false;
 		group->rdbufs_allowed = 0;
 		group->rdbufs_reserved = 0;
-		group->tc_a = -1;
-		group->tc_b = -1;
+		if (idxd->hw.version < DEVICE_VERSION_2 && !tc_override) {
+			group->tc_a = 1;
+			group->tc_b = 1;
+		} else {
+			group->tc_a = -1;
+			group->tc_b = -1;
+		}
 	}
 }