netdev - [PATCH net-next] bnxt_en: Add page_pool_destroy() during RX ring cleanup.

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Date:   Tue,  9 Jul 2019 03:50:07 -0400
From:   Michael Chan <michael.chan@...adcom.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Andy Gospodarek <gospo@...adcom.com>
Subject: [PATCH net-next] bnxt_en: Add page_pool_destroy() during RX ring cleanup.

Add page_pool_destroy() in bnxt_free_rx_rings() during normal RX ring
cleanup, as Ilias has informed us that the following commit has been
merged:

1da4bbeffe41 ("net: core: page_pool: add user refcnt and reintroduce page_pool_destroy")

The special error handling code to call page_pool_free() can now be
removed.  bnxt_free_rx_rings() will always be called during normal
shutdown or any error paths.

Fixes: 322b87ca55f2 ("bnxt_en: add page_pool support")
Cc: Ilias Apalodimas <ilias.apalodimas@...aro.org>
Cc: Andy Gospodarek <gospo@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index e9d3bd8..2b5b0ab 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -2500,6 +2500,7 @@ static void bnxt_free_rx_rings(struct bnxt *bp)
 		if (xdp_rxq_info_is_reg(&rxr->xdp_rxq))
 			xdp_rxq_info_unreg(&rxr->xdp_rxq);
 
+		page_pool_destroy(rxr->page_pool);
 		rxr->page_pool = NULL;
 
 		kfree(rxr->rx_tpa);
@@ -2560,19 +2561,14 @@ static int bnxt_alloc_rx_rings(struct bnxt *bp)
 			return rc;
 
 		rc = xdp_rxq_info_reg(&rxr->xdp_rxq, bp->dev, i);
-		if (rc < 0) {
-			page_pool_free(rxr->page_pool);
-			rxr->page_pool = NULL;
+		if (rc < 0)
 			return rc;
-		}
 
 		rc = xdp_rxq_info_reg_mem_model(&rxr->xdp_rxq,
 						MEM_TYPE_PAGE_POOL,
 						rxr->page_pool);
 		if (rc) {
 			xdp_rxq_info_unreg(&rxr->xdp_rxq);
-			page_pool_free(rxr->page_pool);
-			rxr->page_pool = NULL;
 			return rc;
 		}
 
-- 
2.5.1