netdev - [PATCH net] vmxnet3: unregister xdp rxq info in the reset path

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Message-Id: <20250320045522.57892-1-sankararaman.jayaraman@broadcom.com>
Date: Thu, 20 Mar 2025 10:25:22 +0530
From: Sankararaman Jayaraman <sankararaman.jayaraman@...adcom.com>
To: netdev@...r.kernel.org
Cc: sankararaman.jayaraman@...adcom.com,
	ronak.doshi@...adcom.com,
	bcm-kernel-feedback-list@...adcom.com,
	andrew+netdev@...n.ch,
	davem@...emloft.net,
	u9012063@...il.com,
	kuba@...nel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	ast@...nel.org,
	alexandr.lobakin@...el.com,
	alexanderduyck@...com,
	bpf@...r.kernel.org,
	daniel@...earbox.net,
	hawk@...nel.org,
	john.fastabend@...il.com
Subject: [PATCH net] vmxnet3: unregister xdp rxq info in the reset path

vmxnet3 does not unregister xdp rxq info in the
vmxnet3_reset_work() code path as vmxnet3_rq_destroy()
is not invoked in this code path. So, we get below message with a
backtrace.

Missing unregister, handled but fix driver
WARNING: CPU:48 PID: 500 at net/core/xdp.c:182
__xdp_rxq_info_reg+0x93/0xf0

This patch fixes the problem by moving the unregister
code of XDP from vmxnet3_rq_destroy() to vmxnet3_rq_cleanup().

Fixes: 54f00cce1178 ("vmxnet3: Add XDP support.")
Signed-off-by: Sankararaman Jayaraman <sankararaman.jayaraman@...adcom.com>
Signed-off-by: Ronak Doshi <ronak.doshi@...adcom.com>
---
 drivers/net/vmxnet3/vmxnet3_drv.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index 6793fa09f9d1..3df6aabc7e33 100644
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -2033,6 +2033,11 @@ vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
 
 	rq->comp_ring.gen = VMXNET3_INIT_GEN;
 	rq->comp_ring.next2proc = 0;
+
+	if (xdp_rxq_info_is_reg(&rq->xdp_rxq))
+		xdp_rxq_info_unreg(&rq->xdp_rxq);
+	page_pool_destroy(rq->page_pool);
+	rq->page_pool = NULL;
 }
 
 
@@ -2073,11 +2078,6 @@ static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
 		}
 	}
 
-	if (xdp_rxq_info_is_reg(&rq->xdp_rxq))
-		xdp_rxq_info_unreg(&rq->xdp_rxq);
-	page_pool_destroy(rq->page_pool);
-	rq->page_pool = NULL;
-
 	if (rq->data_ring.base) {
 		dma_free_coherent(&adapter->pdev->dev,
 				  rq->rx_ring[0].size * rq->data_ring.desc_size,
-- 
2.25.1