[dpdk-dev] [PATCH 3/9] net/qede/base: lock entire QM reconfiguration flow

[Rasesh Mody <rmody@marvell.com>]

Multiple flows can issue QM reconfiguration, hence hold the lock longer
to account for entire duration of reconfiguration flow.

Signed-off-by: Rasesh Mody <rmody@marvell.com>
---
 drivers/net/qede/base/ecore_dev.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/drivers/net/qede/base/ecore_dev.c b/drivers/net/qede/base/ecore_dev.c
index d7e1d7b32..b183519b5 100644
--- a/drivers/net/qede/base/ecore_dev.c
+++ b/drivers/net/qede/base/ecore_dev.c
@@ -2291,18 +2291,21 @@ enum _ecore_status_t ecore_qm_reconf(struct ecore_hwfn *p_hwfn,
 {
 	struct ecore_qm_info *qm_info = &p_hwfn->qm_info;
 	bool b_rc;
-	enum _ecore_status_t rc;
+	enum _ecore_status_t rc = ECORE_SUCCESS;
+
+	/* multiple flows can issue qm reconf. Need to lock */
+	OSAL_SPIN_LOCK(&qm_lock);
 
 	/* initialize ecore's qm data structure */
 	ecore_init_qm_info(p_hwfn);
 
 	/* stop PF's qm queues */
-	OSAL_SPIN_LOCK(&qm_lock);
 	b_rc = ecore_send_qm_stop_cmd(p_hwfn, p_ptt, false, true,
 				      qm_info->start_pq, qm_info->num_pqs);
-	OSAL_SPIN_UNLOCK(&qm_lock);
-	if (!b_rc)
-		return ECORE_INVAL;
+	if (!b_rc) {
+		rc = ECORE_INVAL;
+		goto unlock;
+	}
 
 	/* clear the QM_PF runtime phase leftovers from previous init */
 	ecore_init_clear_rt_data(p_hwfn);
@@ -2313,18 +2316,17 @@ enum _ecore_status_t ecore_qm_reconf(struct ecore_hwfn *p_hwfn,
 	/* activate init tool on runtime array */
 	rc = ecore_init_run(p_hwfn, p_ptt, PHASE_QM_PF, p_hwfn->rel_pf_id,
 			    p_hwfn->hw_info.hw_mode);
-	if (rc != ECORE_SUCCESS)
-		return rc;
 
 	/* start PF's qm queues */
-	OSAL_SPIN_LOCK(&qm_lock);
 	b_rc = ecore_send_qm_stop_cmd(p_hwfn, p_ptt, true, true,
 				      qm_info->start_pq, qm_info->num_pqs);
-	OSAL_SPIN_UNLOCK(&qm_lock);
 	if (!b_rc)
-		return ECORE_INVAL;
+		rc = ECORE_INVAL;
 
-	return ECORE_SUCCESS;
+unlock:
+	OSAL_SPIN_UNLOCK(&qm_lock);
+
+	return rc;
 }
 
 static enum _ecore_status_t ecore_alloc_qm_data(struct ecore_hwfn *p_hwfn)
-- 
2.18.0