linux-kernel - [PATCH 5.15 741/917] dmaengine: idxd: reconfig device after device reset command

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Date:   Mon, 15 Nov 2021 18:03:56 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sanjay Kumar <sanjay.k.kumar@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Vinod Koul <vkoul@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 741/917] dmaengine: idxd: reconfig device after device reset command

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

[ Upstream commit e530a9f3db4188d1f4e3704b0948ef69c04d5ca6 ]

Device reset clears the MSIXPERM table and the device registers. Re-program
the MSIXPERM table and re-enable the error interrupts post reset.

Fixes: 745e92a6d816 ("dmaengine: idxd: idxd: move remove() bits for idxd 'struct device' to device.c")
Reported-by: Sanjay Kumar <sanjay.k.kumar@...el.com>
Signed-off-by: Dave Jiang <dave.jiang@...el.com>
Link: https://lore.kernel.org/r/163054188513.2853562.12077053294595278181.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 | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index cbbfa17d8d11b..419b206f8a42d 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -583,6 +583,8 @@ void idxd_device_reset(struct idxd_device *idxd)
 	spin_lock(&idxd->dev_lock);
 	idxd_device_clear_state(idxd);
 	idxd->state = IDXD_DEV_DISABLED;
+	idxd_unmask_error_interrupts(idxd);
+	idxd_msix_perm_setup(idxd);
 	spin_unlock(&idxd->dev_lock);
 }
 
-- 
2.33.0