linux-kernel - [PATCH AUTOSEL 5.6 017/129] dmaengine: idxd: reflect shadow copy of traffic class programming

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Date:   Wed, 15 Apr 2020 07:32:52 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Dave Jiang <dave.jiang@...el.com>,
        Yixin Zhang <yixin.zhang@...el.com>,
        Vinod Koul <vkoul@...nel.org>, Sasha Levin <sashal@...nel.org>,
        dmaengine@...r.kernel.org
Subject: [PATCH AUTOSEL 5.6 017/129] dmaengine: idxd: reflect shadow copy of traffic class programming

From: Dave Jiang <dave.jiang@...el.com>

[ Upstream commit a1fcaf07ec718bb1f11e29e952c9a4cb733d57a5 ]

The traffic class are set to -1 at initialization until the user programs
them. If the user choose not to, the driver will program appropriate
defaults. The driver also needs to update the shadowed copies of the values
after doing the programming.

Fixes: c52ca478233c ("dmaengine: idxd: add configuration component of driver")
Reported-by: Yixin Zhang <yixin.zhang@...el.com>
Signed-off-by: Dave Jiang <dave.jiang@...el.com>
Link: https://lore.kernel.org/r/158386263076.10898.4586509576813094559.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/dma/idxd/device.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index ada69e722f84a..f6f49f0f6fae2 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -584,11 +584,11 @@ static void idxd_group_flags_setup(struct idxd_device *idxd)
 		struct idxd_group *group = &idxd->groups[i];
 
 		if (group->tc_a == -1)
-			group->grpcfg.flags.tc_a = 0;
+			group->tc_a = group->grpcfg.flags.tc_a = 0;
 		else
 			group->grpcfg.flags.tc_a = group->tc_a;
 		if (group->tc_b == -1)
-			group->grpcfg.flags.tc_b = 1;
+			group->tc_b = group->grpcfg.flags.tc_b = 1;
 		else
 			group->grpcfg.flags.tc_b = group->tc_b;
 		group->grpcfg.flags.use_token_limit = group->use_token_limit;
-- 
2.20.1