netdev - [PATCH net 4/4] ibmvnic: remove unused ->wait

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Date:   Fri, 21 Jan 2022 18:59:21 -0800
From:   Sukadev Bhattiprolu <sukadev@...ux.ibm.com>
To:     netdev@...r.kernel.org
Cc:     Brian King <brking@...ux.ibm.com>, Dany Madden <drt@...ux.ibm.com>,
        Rick Lindsley <ricklind@...ux.ibm.com>
Subject: [PATCH net 4/4] ibmvnic: remove unused ->wait_capability

With previous bug fix, ->wait_capability flag is no longer needed and can
be removed.

Fixes: 249168ad07cd ("ibmvnic: Make CRQ interrupt tasklet wait for all capabilities crqs")
Signed-off-by: Sukadev Bhattiprolu <sukadev@...ux.ibm.com>
---
 drivers/net/ethernet/ibm/ibmvnic.c | 38 +++++++++++-------------------
 drivers/net/ethernet/ibm/ibmvnic.h |  1 -
 2 files changed, 14 insertions(+), 25 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 682a440151a8..8ed0b95147db 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -4876,10 +4876,8 @@ static void handle_request_cap_rsp(union ibmvnic_crq *crq,
 	}
 
 	/* Done receiving requested capabilities, query IP offload support */
-	if (atomic_read(&adapter->running_cap_crqs) == 0) {
-		adapter->wait_capability = false;
+	if (atomic_read(&adapter->running_cap_crqs) == 0)
 		send_query_ip_offload(adapter);
-	}
 }
 
 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
@@ -5177,10 +5175,8 @@ static void handle_query_cap_rsp(union ibmvnic_crq *crq,
 	}
 
 out:
-	if (atomic_read(&adapter->running_cap_crqs) == 0) {
-		adapter->wait_capability = false;
+	if (atomic_read(&adapter->running_cap_crqs) == 0)
 		send_request_cap(adapter, 0);
-	}
 }
 
 static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
@@ -5476,27 +5472,21 @@ static void ibmvnic_tasklet(struct tasklet_struct *t)
 	struct ibmvnic_crq_queue *queue = &adapter->crq;
 	union ibmvnic_crq *crq;
 	unsigned long flags;
-	bool done = false;
 
 	spin_lock_irqsave(&queue->lock, flags);
-	while (!done) {
-		/* Pull all the valid messages off the CRQ */
-		while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
-			/* This barrier makes sure ibmvnic_next_crq()'s
-			 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded
-			 * before ibmvnic_handle_crq()'s
-			 * switch(gen_crq->first) and switch(gen_crq->cmd).
-			 */
-			dma_rmb();
-			ibmvnic_handle_crq(crq, adapter);
-			crq->generic.first = 0;
-		}
+
+	/* Pull all the valid messages off the CRQ */
+	while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
+		/* This barrier makes sure ibmvnic_next_crq()'s
+		 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded
+		 * before ibmvnic_handle_crq()'s
+		 * switch(gen_crq->first) and switch(gen_crq->cmd).
+		 */
+		dma_rmb();
+		ibmvnic_handle_crq(crq, adapter);
+		crq->generic.first = 0;
 	}
-	/* if capabilities CRQ's were sent in this tasklet, the following
-	 * tasklet must wait until all responses are received
-	 */
-	if (atomic_read(&adapter->running_cap_crqs) != 0)
-		adapter->wait_capability = true;
+
 	spin_unlock_irqrestore(&queue->lock, flags);
 }
 
diff --git a/drivers/net/ethernet/ibm/ibmvnic.h b/drivers/net/ethernet/ibm/ibmvnic.h
index b8e42f67d897..a80f94e161ad 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.h
+++ b/drivers/net/ethernet/ibm/ibmvnic.h
@@ -921,7 +921,6 @@ struct ibmvnic_adapter {
 	int login_rsp_buf_sz;
 
 	atomic_t running_cap_crqs;
-	bool wait_capability;
 
 	struct ibmvnic_sub_crq_queue **tx_scrq ____cacheline_aligned;
 	struct ibmvnic_sub_crq_queue **rx_scrq ____cacheline_aligned;
-- 
2.27.0