From 6b9a418d3850dd7d87a9168da973e8843a219476 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Mon, 11 Apr 2022 15:06:34 -0700 Subject: [PATCH] dmaengine: idxd: skip clearing device context when device is read-only [ Upstream commit 1cd8e751d96c43ece3f6842ac2244a37d9332c3a ] If the device shows up as read-only configuration, skip the clearing of the state as the context must be preserved for device re-enable after being disabled. Fixes: 0dcfe41e9a4c ("dmanegine: idxd: cleanup all device related bits after disabling device") Reported-by: Tony Zhu Tested-by: Tony Zhu Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/164971479479.2200566.13980022473526292759.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/dma/idxd/device.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c index a67bafc..e622245 100644 --- a/drivers/dma/idxd/device.c +++ b/drivers/dma/idxd/device.c @@ -730,6 +730,9 @@ static void idxd_device_wqs_clear_state(struct idxd_device *idxd) void idxd_device_clear_state(struct idxd_device *idxd) { + if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) + return; + idxd_groups_clear_state(idxd); idxd_engines_clear_state(idxd); idxd_device_wqs_clear_state(idxd); -- 2.7.4