netdev - [PATCH V3 net-next v3 3/3] net: ena: Add first

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Date:   Tue, 10 Dec 2019 15:12:14 +0200
From:   <sameehj@...zon.com>
To:     <davem@...emloft.net>, <netdev@...r.kernel.org>
CC:     Sameeh Jubran <sameehj@...zon.com>, <brouer@...hat.com>,
        <ilias.apalodimas@...aro.org>, <dwmw@...zon.com>,
        <zorik@...zon.com>, <matua@...zon.com>, <saeedb@...zon.com>,
        <msw@...zon.com>, <aliguori@...zon.com>, <nafea@...zon.com>,
        <gtzalik@...zon.com>, <netanel@...zon.com>, <alisaidi@...zon.com>,
        <benh@...zon.com>, <akiyano@...zon.com>
Subject: [PATCH V3 net-next v3 3/3] net: ena: Add first_interrupt field to napi struct

From: Sameeh Jubran <sameehj@...zon.com>

The first_interrupt field is accessed in ena_intr_msix_io() upon
receiving an interrupt.The rx_ring and tx_ring fields of napi can
be NULL when receiving interrupt for xdp queues. This patch fixes
the issue by moving the field to the ena_napi struct.

Signed-off-by: Sameeh Jubran <sameehj@...zon.com>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 7 +++++--
 drivers/net/ethernet/amazon/ena/ena_netdev.h | 1 +
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 55eeaab79..d161537e2 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -219,6 +219,7 @@ static int ena_xdp_io_poll(struct napi_struct *napi, int budget)
 	int ret;
 
 	xdp_ring = ena_napi->xdp_ring;
+	xdp_ring->first_interrupt = ena_napi->first_interrupt;
 
 	xdp_budget = budget;
 
@@ -1869,6 +1870,9 @@ static int ena_io_poll(struct napi_struct *napi, int budget)
 	tx_ring = ena_napi->tx_ring;
 	rx_ring = ena_napi->rx_ring;
 
+	tx_ring->first_interrupt = ena_napi->first_interrupt;
+	rx_ring->first_interrupt = ena_napi->first_interrupt;
+
 	tx_budget = tx_ring->ring_size / ENA_TX_POLL_BUDGET_DIVIDER;
 
 	if (!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
@@ -1940,8 +1944,7 @@ static irqreturn_t ena_intr_msix_io(int irq, void *data)
 {
 	struct ena_napi *ena_napi = data;
 
-	ena_napi->tx_ring->first_interrupt = true;
-	ena_napi->rx_ring->first_interrupt = true;
+	ena_napi->first_interrupt = true;
 
 	napi_schedule_irqoff(&ena_napi->napi);
 
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 9bfb275b2..094324fd0 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -169,6 +169,7 @@ struct ena_napi {
 	struct ena_ring *tx_ring;
 	struct ena_ring *rx_ring;
 	struct ena_ring *xdp_ring;
+	bool first_interrupt;
 	u32 qid;
 	struct dim dim;
 };
-- 
2.17.1