This is a note to let you know that I've just added the patch titled
dmaengine: idxd: restore traffic class defaults after wq reset
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dmaengine-idxd-restore-traffic-class-defaults-after-.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 0f75feeab9680d2915a2bd2680326cdb788bf850
Author: Dave Jiang <dave.jiang@xxxxxxxxx>
Date: Mon Jan 24 09:20:33 2022 -0700
dmaengine: idxd: restore traffic class defaults after wq reset
[ Upstream commit ea7c8f598c323f6ebaf9ddae01fb2a981fe8c56a ]
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@xxxxxxxxx>
Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Link: https://lore.kernel.org/r/164304123369.824298.6952463420266592087.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index ac671b6c0c36..7bd9ac1e93b2 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -703,8 +703,13 @@ 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;
+ }
}
}
