This is a note to let you know that I've just added the patch titled
net: fec: add phy-reset-gpios PROBE_DEFER check
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: net-fec-add-phy-reset-gpios-probe_defer-check.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Sun Mar 18 16:55:33 CET 2018
From: Fugang Duan fugang.duan@nxp.com Date: Tue, 11 Apr 2017 19:13:06 +0800 Subject: net: fec: add phy-reset-gpios PROBE_DEFER check
From: Fugang Duan fugang.duan@nxp.com
[ Upstream commit 9269e5560b261eb9ee157497890dc0948db76cf8 ]
Many boards use i2c/spi expander gpio as phy-reset-gpios and these gpios maybe registered after fec port, driver should check the return value of .of_get_named_gpio().
Signed-off-by: Fugang Duan B38611@freescale.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/freescale/fec_main.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-)
--- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -3209,7 +3209,7 @@ static int fec_enet_init(struct net_devi }
#ifdef CONFIG_OF -static void fec_reset_phy(struct platform_device *pdev) +static int fec_reset_phy(struct platform_device *pdev) { int err, phy_reset; bool active_high = false; @@ -3217,7 +3217,7 @@ static void fec_reset_phy(struct platfor struct device_node *np = pdev->dev.of_node;
if (!np) - return; + return 0;
of_property_read_u32(np, "phy-reset-duration", &msec); /* A sane reset duration should not be longer than 1s */ @@ -3225,8 +3225,10 @@ static void fec_reset_phy(struct platfor msec = 1;
phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0); - if (!gpio_is_valid(phy_reset)) - return; + if (phy_reset == -EPROBE_DEFER) + return phy_reset; + else if (!gpio_is_valid(phy_reset)) + return 0;
active_high = of_property_read_bool(np, "phy-reset-active-high");
@@ -3235,7 +3237,7 @@ static void fec_reset_phy(struct platfor "phy-reset"); if (err) { dev_err(&pdev->dev, "failed to get phy-reset-gpios: %d\n", err); - return; + return err; }
if (msec > 20) @@ -3244,14 +3246,17 @@ static void fec_reset_phy(struct platfor usleep_range(msec * 1000, msec * 1000 + 1000);
gpio_set_value_cansleep(phy_reset, !active_high); + + return 0; } #else /* CONFIG_OF */ -static void fec_reset_phy(struct platform_device *pdev) +static int fec_reset_phy(struct platform_device *pdev) { /* * In case of platform probe, the reset has been done * by machine code. */ + return 0; } #endif /* CONFIG_OF */
@@ -3422,6 +3427,7 @@ fec_probe(struct platform_device *pdev) if (ret) { dev_err(&pdev->dev, "Failed to enable phy regulator: %d\n", ret); + clk_disable_unprepare(fep->clk_ipg); goto failed_regulator; } } else { @@ -3434,7 +3440,9 @@ fec_probe(struct platform_device *pdev) pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev);
- fec_reset_phy(pdev); + ret = fec_reset_phy(pdev); + if (ret) + goto failed_reset;
if (fep->bufdesc_ex) fec_ptp_init(pdev); @@ -3495,8 +3503,10 @@ failed_init: fec_ptp_stop(pdev); if (fep->reg_phy) regulator_disable(fep->reg_phy); +failed_reset: + pm_runtime_put(&pdev->dev); + pm_runtime_disable(&pdev->dev); failed_regulator: - clk_disable_unprepare(fep->clk_ipg); failed_clk_ipg: fec_enet_clk_enable(ndev, false); failed_clk:
Patches currently in stable-queue which might be from fugang.duan@nxp.com are
queue-4.9/net-fec-add-phy-reset-gpios-probe_defer-check.patch