linux-kernel - [PATCH net-next 2/4] pds_core: Unmask adminq interrupt in work thread

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Date: Fri, 2 Feb 2024 11:59:09 -0800
From: Brett Creeley <brett.creeley@....com>
To: <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>, <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <shannon.nelson@....com>, <brett.creeley@....com>
Subject: [PATCH net-next 2/4] pds_core: Unmask adminq interrupt in work thread

Unmasking the interrupt during the pdsc_adminq_isr
is a bit early and could cause unnecessary interrupts.
Instead always unmask after processing the adminq
and notifyq in pdsc_work_thread()->pdsc_process_adminq().
Also, since we are always unmasking, there's no need
for the local credits variable in pdsc_process_adminq().

Signed-off-by: Brett Creeley <brett.creeley@....com>
Reviewed-by: Shannon Nelson <shannon.nelson@....com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
---
 drivers/net/ethernet/amd/pds_core/adminq.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/amd/pds_core/adminq.c b/drivers/net/ethernet/amd/pds_core/adminq.c
index ea773cfa0af6..c83a0a80d533 100644
--- a/drivers/net/ethernet/amd/pds_core/adminq.c
+++ b/drivers/net/ethernet/amd/pds_core/adminq.c
@@ -82,7 +82,6 @@ void pdsc_process_adminq(struct pdsc_qcq *qcq)
 	unsigned long irqflags;
 	int nq_work = 0;
 	int aq_work = 0;
-	int credits;
 
 	/* Don't process AdminQ when it's not up */
 	if (!pdsc_adminq_inc_if_up(pdsc)) {
@@ -128,11 +127,9 @@ void pdsc_process_adminq(struct pdsc_qcq *qcq)
 
 credits:
 	/* Return the interrupt credits, one for each completion */
-	credits = nq_work + aq_work;
-	if (credits)
-		pds_core_intr_credits(&pdsc->intr_ctrl[qcq->intx],
-				      credits,
-				      PDS_CORE_INTR_CRED_REARM);
+	pds_core_intr_credits(&pdsc->intr_ctrl[qcq->intx],
+			      nq_work + aq_work,
+			      PDS_CORE_INTR_CRED_REARM);
 	refcount_dec(&pdsc->adminq_refcnt);
 }
 
@@ -157,7 +154,6 @@ irqreturn_t pdsc_adminq_isr(int irq, void *data)
 
 	qcq = &pdsc->adminqcq;
 	queue_work(pdsc->wq, &qcq->work);
-	pds_core_intr_mask(&pdsc->intr_ctrl[qcq->intx], PDS_CORE_INTR_MASK_CLEAR);
 	refcount_dec(&pdsc->adminq_refcnt);
 
 	return IRQ_HANDLED;
-- 
2.17.1