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From: Dave Jiang <dave.jiang@intel.com>
To: vkoul@kernel.org
Cc: Binuraj Ravindran <binuraj.ravindran@intel.com>,
	dmaengine@vger.kernel.org
Subject: [PATCH] dmaengine: idxd: restore traffic class defaults after wq reset
Date: Mon, 24 Jan 2022 09:20:33 -0700	[thread overview]
Message-ID: <164304123369.824298.6952463420266592087.stgit@djiang5-desk3.ch.intel.com> (raw)

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: ade8a86b512c ("dmaengine: idxd: Set defaults for GRPCFG traffic class")
Reported-by: Binuraj Ravindran <binuraj.ravindran@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
 drivers/dma/idxd/device.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 573ad8b86804..3061fe857d69 100644
--- 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;
+		}
 	}
 }
 



             reply	other threads:[~2022-01-24 16:21 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-24 16:20 Dave Jiang [this message]
2022-02-15 11:37 ` [PATCH] dmaengine: idxd: restore traffic class defaults after wq reset Vinod Koul

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