From: Serge Semin <Sergey.Semin@baikalelectronics.ru>
To: Rob Herring <robh+dt@kernel.org>,
Giuseppe Cavallaro <peppe.cavallaro@st.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
Jose Abreu <joabreu@synopsys.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Johan Hovold <johan@kernel.org>,
Maxime Ripard <mripard@kernel.org>,
Joao Pinto <jpinto@synopsys.com>, Lars Persson <larper@axis.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Serge Semin <Sergey.Semin@baikalelectronics.ru>,
Serge Semin <fancer.lancer@gmail.com>,
Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>,
Vyacheslav Mitrofanov
<Vyacheslav.Mitrofanov@baikalelectronics.ru>,
<netdev@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<linux-arm-kernel@lists.infradead.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v2 17/24] net: stmmac: dwc-qos: Cleanup STMMAC platform data clock pointers
Date: Mon, 8 Feb 2021 16:56:01 +0300 [thread overview]
Message-ID: <20210208135609.7685-18-Sergey.Semin@baikalelectronics.ru> (raw)
In-Reply-To: <20210208135609.7685-1-Sergey.Semin@baikalelectronics.ru>
The pointers need to be nullified otherwise the stmmac_remove_config_dt()
method called after them being initialized will disable the clocks. That
then will cause a WARN() backtrace being printed since the clocks would be
also disabled in the locally defined remove method.
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
---
.../stmicro/stmmac/dwmac-dwc-qos-eth.c | 42 ++++++++++++++-----
1 file changed, 32 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
index 27254b27d7ed..20b3696fb776 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
@@ -123,39 +123,46 @@ static int dwc_qos_probe(struct platform_device *pdev,
struct plat_stmmacenet_data *plat_dat,
struct stmmac_resources *stmmac_res)
{
+ struct clk *clk;
int err;
- plat_dat->stmmac_clk = devm_clk_get(&pdev->dev, "apb_pclk");
- if (IS_ERR(plat_dat->stmmac_clk)) {
+ clk = devm_clk_get(&pdev->dev, "apb_pclk");
+ if (IS_ERR(clk)) {
dev_err(&pdev->dev, "apb_pclk clock not found.\n");
- return PTR_ERR(plat_dat->stmmac_clk);
+ return PTR_ERR(clk);
}
- err = clk_prepare_enable(plat_dat->stmmac_clk);
+ err = clk_prepare_enable(clk);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable apb_pclk clock: %d\n",
err);
return err;
}
- plat_dat->pclk = devm_clk_get(&pdev->dev, "phy_ref_clk");
- if (IS_ERR(plat_dat->pclk)) {
+ plat_dat->stmmac_clk = clk;
+
+ clk = devm_clk_get(&pdev->dev, "phy_ref_clk");
+ if (IS_ERR(clk)) {
dev_err(&pdev->dev, "phy_ref_clk clock not found.\n");
- err = PTR_ERR(plat_dat->pclk);
+ err = PTR_ERR(clk);
goto disable;
}
- err = clk_prepare_enable(plat_dat->pclk);
+ err = clk_prepare_enable(clk);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable phy_ref clock: %d\n",
err);
goto disable;
}
+ plat_dat->pclk = clk;
+
return 0;
disable:
clk_disable_unprepare(plat_dat->stmmac_clk);
+ plat_dat->stmmac_clk = NULL;
+
return err;
}
@@ -164,8 +171,15 @@ static int dwc_qos_remove(struct platform_device *pdev)
struct net_device *ndev = platform_get_drvdata(pdev);
struct stmmac_priv *priv = netdev_priv(ndev);
+ /* Cleanup the pointers to the clock handlers hidden in the platform
+ * data so the stmmac_remove_config_dt() method wouldn't have disabled
+ * the clocks too.
+ */
clk_disable_unprepare(priv->plat->pclk);
+ priv->plat->pclk = NULL;
+
clk_disable_unprepare(priv->plat->stmmac_clk);
+ priv->plat->stmmac_clk = NULL;
return 0;
}
@@ -301,12 +315,12 @@ static int tegra_eqos_probe(struct platform_device *pdev,
goto disable_master;
}
- data->stmmac_clk = eqos->clk_slave;
-
err = clk_prepare_enable(eqos->clk_slave);
if (err < 0)
goto disable_master;
+ data->stmmac_clk = eqos->clk_slave;
+
eqos->clk_rx = devm_clk_get(&pdev->dev, "rx");
if (IS_ERR(eqos->clk_rx)) {
err = PTR_ERR(eqos->clk_rx);
@@ -377,6 +391,7 @@ static int tegra_eqos_probe(struct platform_device *pdev,
clk_disable_unprepare(eqos->clk_rx);
disable_slave:
clk_disable_unprepare(eqos->clk_slave);
+ data->stmmac_clk = NULL;
disable_master:
clk_disable_unprepare(eqos->clk_master);
error:
@@ -385,6 +400,7 @@ static int tegra_eqos_probe(struct platform_device *pdev,
static int tegra_eqos_remove(struct platform_device *pdev)
{
+ struct stmmac_priv *priv = netdev_priv(platform_get_drvdata(pdev));
struct tegra_eqos *eqos = get_stmmac_bsp_priv(&pdev->dev);
reset_control_assert(eqos->rst);
@@ -394,6 +410,12 @@ static int tegra_eqos_remove(struct platform_device *pdev)
clk_disable_unprepare(eqos->clk_slave);
clk_disable_unprepare(eqos->clk_master);
+ /* Cleanup the pointers to the clock handlers hidden in the platform
+ * data so the stmmac_remove_config_dt() method wouldn't have disabled
+ * the clocks too.
+ */
+ priv->plat->stmmac_clk = NULL;
+
return 0;
}
--
2.29.2
next prev parent reply other threads:[~2021-02-08 14:06 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-08 13:55 [PATCH v2 00/24] net: stmmac: Fix clocks/reset-related procedures Serge Semin
2021-02-08 13:55 ` [PATCH v2 01/24] dt-bindings: net: dwmac: Validate PBL for all IP-cores Serge Semin
2021-02-08 13:55 ` [PATCH v2 02/24] dt-bindings: net: dwmac: Extend number of PBL values Serge Semin
2021-02-08 13:55 ` [PATCH v2 03/24] dt-bindings: net: dwmac: Fix the TSO property declaration Serge Semin
2021-02-09 21:54 ` Rob Herring
2021-02-08 13:55 ` [PATCH v2 04/24] dt-bindings: net: dwmac: Refactor snps,*-config properties Serge Semin
2021-02-09 22:26 ` Rob Herring
2021-02-10 21:57 ` Serge Semin
2021-02-18 15:55 ` Serge Semin
2021-02-08 13:55 ` [PATCH v2 05/24] dt-bindings: net: dwmac: Elaborate stmmaceth/pclk description Serge Semin
2021-02-08 13:55 ` [PATCH v2 06/24] dt-bindings: net: dwmac: Add Tx/Rx clock sources Serge Semin
2021-02-08 13:55 ` [PATCH v2 07/24] dt-bindings: net: dwmac: Detach Generic DW MAC bindings Serge Semin
2021-02-09 22:32 ` Rob Herring
2021-02-10 22:05 ` Serge Semin
2021-02-08 13:55 ` [PATCH v2 08/24] net: stmmac: Add {axi,mtl-rx,mtl-tx}-config sub-nodes support Serge Semin
2021-02-08 13:55 ` [PATCH v2 09/24] net: stmmac: dwmac-rk: Cleanup STMMAC DT-config in remove cb Serge Semin
2021-02-08 13:55 ` [PATCH v2 10/24] net: stmmac: dwmac-sti: " Serge Semin
2021-02-08 13:55 ` [PATCH v2 11/24] net: stmmac: dwmac-stm32: " Serge Semin
2021-02-08 13:55 ` [PATCH v2 12/24] net: stmmac: Directly call reverse methods in stmmac_probe_config_dt() Serge Semin
2021-02-08 13:55 ` [PATCH v2 13/24] net: stmmac: Fix clocks left enabled on glue-probes failure Serge Semin
2021-02-08 13:55 ` [PATCH v2 14/24] net: stmmac: Use optional clock request method to get stmmaceth Serge Semin
2021-02-08 13:55 ` [PATCH v2 15/24] net: stmmac: Use optional clock request method to get ptp_clk Serge Semin
2021-02-08 13:56 ` [PATCH v2 16/24] net: stmmac: Use optional reset control API to work with stmmaceth Serge Semin
2021-02-10 6:49 ` Jisheng Zhang
2021-02-10 22:14 ` Serge Semin
2021-02-08 13:56 ` Serge Semin [this message]
2021-02-08 13:56 ` [PATCH v2 18/24] net: stmmac: dwc-qos: Use dev_err_probe() for probe errors handling Serge Semin
2021-02-08 13:56 ` [PATCH v2 19/24] net: stmmac: Add Tx/Rx platform clocks support Serge Semin
2021-02-08 13:56 ` [PATCH v2 20/24] net: stmmac: dwc-qos: Discard Tx/Rx clocks request Serge Semin
2021-02-08 13:56 ` [PATCH v2 21/24] net: stmmac: dwmac-imx: Discard Tx clock request Serge Semin
2021-02-08 13:56 ` [PATCH v2 22/24] net: stmmac: Call stmmaceth clock as system clock in warn-message Serge Semin
2021-02-08 13:56 ` [PATCH v2 23/24] net: stmmac: Use pclk to set MDC clock frequency Serge Semin
2021-02-08 13:56 ` [PATCH v2 24/24] net: stmmac: dwc-qos: Save master/slave clocks in the plat-data Serge Semin
2021-02-08 19:05 ` [PATCH v2 00/24] net: stmmac: Fix clocks/reset-related procedures Jakub Kicinski
2021-02-09 10:59 ` Serge Semin
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