dmaengine: idxd: clear block on fault flag when clear wq

mainline inclusion
from mainline-v5.15
commit bd2f4ae5
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596WO
CVE: NA

Intel-SIG: commit bd2f4ae5 dmaengine: idxd: clear block on fault flag when clear wq.
Incremental backporting patches for DSA/IAA on Intel Xeon platform.

--------------------------------

The block on fault flag is not cleared when we disable or reset wq. This
causes it to remain set if the user does not clear it on the next
configuration load. Add clear of flag in dxd_wq_disable_cleanup()
routine.

Fixes: da32b28c ("dmaengine: idxd: cleanup workqueue config after disabling")
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162803023553.3086015.8158952172068868803.stgit@djiang5-desk3.ch.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NXiaochen Shen <xiaochen.shen@intel.com>

drivers/dma/idxd/device.c

@@ -402,6 +402,7 @@ static void idxd_wq_disable_cleanup(struct idxd_wq *wq)
 	wq->priority = 0;
 	wq->ats_dis = 0;
 	clear_bit(WQ_FLAG_DEDICATED, &wq->flags);
+	clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags);
 	memset(wq->name, 0, WQ_NAME_SIZE);
 }