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Message-ID: <ZJQFhYGeYATpZB6B@nanopsycho>
Date: Thu, 22 Jun 2023 10:25:41 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: Maxim Kochetkov <fido_max@...ox.ru>
Cc: netdev@...r.kernel.org,
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: Re: [PATCH 1/1] net: axienet: Move reset before DMA detection
Wed, Jun 21, 2023 at 01:26:30PM CEST, fido_max@...ox.ru wrote:
>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>
You are missing a "Fixes:" tag here pointing out to the patch that
introduced the issue.
>---
> 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
>
>
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