linux-kernel - [PATCH 1/1] net: axienet: Move reset before DMA detection

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Message-Id: <20230621112630.154373-1-fido_max@inbox.ru>
Date:   Wed, 21 Jun 2023 14:26:30 +0300
From:   Maxim Kochetkov <fido_max@...ox.ru>
To:     netdev@...r.kernel.org
Cc:     Maxim Kochetkov <fido_max@...ox.ru>,
        Radhey Shyam Pandey <radhey.shyam.pandey@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Michal Simek <michal.simek@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] net: axienet: Move reset before DMA detection

DMA detection will fail if axinet was started before (by boot loader,
boot ROM, etc). In this state axinet will not start properly.
So move axinet reset before DMA detection.

Signed-off-by: Maxim Kochetkov <fido_max@...ox.ru>
---
 drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index 3e310b55bce2..734822321e0a 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -2042,6 +2042,11 @@ static int axienet_probe(struct platform_device *pdev)
 		goto cleanup_clk;
 	}
 
+	/* Reset core now that clocks are enabled, prior to accessing MDIO */
+	ret = __axienet_device_reset(lp);
+	if (ret)
+		goto cleanup_clk;
+
 	/* Autodetect the need for 64-bit DMA pointers.
 	 * When the IP is configured for a bus width bigger than 32 bits,
 	 * writing the MSB registers is mandatory, even if they are all 0.
@@ -2096,11 +2101,6 @@ static int axienet_probe(struct platform_device *pdev)
 	lp->coalesce_count_tx = XAXIDMA_DFT_TX_THRESHOLD;
 	lp->coalesce_usec_tx = XAXIDMA_DFT_TX_USEC;
 
-	/* Reset core now that clocks are enabled, prior to accessing MDIO */
-	ret = __axienet_device_reset(lp);
-	if (ret)
-		goto cleanup_clk;
-
 	ret = axienet_mdio_setup(lp);
 	if (ret)
 		dev_warn(&pdev->dev,
-- 
2.40.1