[PATCH] Revert "IB/core: Fix use workqueue without WQ_MEM_RECLAIM"

[Maurizio Lombardi <mlombard@redhat.com>]

when nvme_rdma_reconnect_ctrl_work() fails, it flushes
the ib_addr:process_one_req() work but the latter is enqueued
on addr_wq which has been marked as "!WQ_MEM_RECLAIM".

workqueue: WQ_MEM_RECLAIM nvme-wq:nvme_rdma_reconnect_ctrl_work
[nvme_rdma] is flushing !WQ_MEM_RECLAIM ib_addr:process_one_req [ib_core]

Call Trace:
__flush_work.isra.0+0xbf/0x230
__cancel_work_timer+0x103/0x190
? rdma_resolve_ip+0x257/0x2f0 [ib_core]
? __dev_printk+0x2d/0x69
rdma_addr_cancel+0x8e/0xc0 [ib_core]
_destroy_id+0x1b/0x270 [rdma_cm]
nvme_rdma_alloc_queue.cold+0x4b/0x5c [nvme_rdma]
nvme_rdma_configure_admin_queue+0x1e/0x2f0 [nvme_rdma]
nvme_rdma_setup_ctrl+0x1e/0x220 [nvme_rdma]
nvme_rdma_reconnect_ctrl_work+0x22/0x30 [nvme_rdma]

This has been introduced by
commit 39baf10310e6 ("IB/core: Fix use workqueue without WQ_MEM_RECLAIM")

Since nvme_rdma_reconnect_work() needs to flush process_one_req(), we
have to restore the WQ_MEM_RECLAIM flag on the addr_wq workqueue.

This reverts commit 39baf10310e6669564a485b55267fae70a4e44ae.

Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
---
 drivers/infiniband/core/addr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index f253295795f0..5c36d01ebf0b 100644
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -872,7 +872,7 @@ static struct notifier_block nb = {
 
 int addr_init(void)
 {
-	addr_wq = alloc_ordered_workqueue("ib_addr", 0);
+	addr_wq = alloc_ordered_workqueue("ib_addr", WQ_MEM_RECLAIM);
 	if (!addr_wq)
 		return -ENOMEM;
 
-- 
2.39.1