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From: Alan Stern <stern@rowland.harvard.edu>
To: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: "Madalin Bucur" <madalin.bucur@nxp.com>,
	"David S . Miller" <davem@davemloft.net>,
	"Eric Dumazet" <edumazet@google.com>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Paolo Abeni" <pabeni@redhat.com>,
	"Horatiu Vultur" <horatiu.vultur@microchip.com>,
	UNGLinuxDriver@microchip.com,
	"Thierry Reding" <thierry.reding@gmail.com>,
	"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
	"Rob Herring" <robh@kernel.org>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Jonathan Hunter" <jonathanh@nvidia.com>,
	"Vinod Koul" <vkoul@kernel.org>,
	"Kishon Vijay Abraham I" <kishon@kernel.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski@linaro.org>,
	"Alim Akhtar" <alim.akhtar@samsung.com>,
	"Siddharth Vadapalli" <s-vadapalli@ti.com>,
	"Russell King" <linux@armlinux.org.uk>,
	netdev@vger.kernel.org, linux-tegra@vger.kernel.org,
	linux-pci@vger.kernel.org, linux-phy@lists.infradead.org,
	linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org
Subject: Re: [PATCH 7/7] usb: host: ohci-exynos: Convert to devm_of_phy_optional_get()
Date: Wed, 18 Jan 2023 11:18:58 -0500	[thread overview]
Message-ID: <Y8gb8l18XzYOPhoD@rowland.harvard.edu> (raw)
In-Reply-To: <cd685d8e4d6754c384acfc1796065d539a2c3ea8.1674036164.git.geert+renesas@glider.be>

On Wed, Jan 18, 2023 at 11:15:20AM +0100, Geert Uytterhoeven wrote:
> Use the new devm_of_phy_optional_get() helper instead of open-coding the
> same operation.
> 
> This lets us drop several checks for IS_ERR(), as phy_power_{on,off}()
> handle NULL parameters fine.

The patch ignores a possible -ENOSYS error return.  Is it known that 
this will never happen?

Alan Stern

> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
>  drivers/usb/host/ohci-exynos.c | 24 +++++++-----------------
>  1 file changed, 7 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
> index 8d7977fd5d3bd502..8dd9c3b2411c383f 100644
> --- a/drivers/usb/host/ohci-exynos.c
> +++ b/drivers/usb/host/ohci-exynos.c
> @@ -69,19 +69,12 @@ static int exynos_ohci_get_phy(struct device *dev,
>  			return -EINVAL;
>  		}
>  
> -		phy = devm_of_phy_get(dev, child, NULL);
> +		phy = devm_of_phy_optional_get(dev, child, NULL);
>  		exynos_ohci->phy[phy_number] = phy;
>  		if (IS_ERR(phy)) {
> -			ret = PTR_ERR(phy);
> -			if (ret == -EPROBE_DEFER) {
> -				of_node_put(child);
> -				return ret;
> -			} else if (ret != -ENOSYS && ret != -ENODEV) {
> -				dev_err(dev,
> -					"Error retrieving usb2 phy: %d\n", ret);
> -				of_node_put(child);
> -				return ret;
> -			}
> +			of_node_put(child);
> +			return dev_err_probe(dev, PTR_ERR(phy),
> +					     "Error retrieving usb2 phy\n");
>  		}
>  	}
>  
> @@ -97,12 +90,10 @@ static int exynos_ohci_phy_enable(struct device *dev)
>  	int ret = 0;
>  
>  	for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
> -		if (!IS_ERR(exynos_ohci->phy[i]))
> -			ret = phy_power_on(exynos_ohci->phy[i]);
> +		ret = phy_power_on(exynos_ohci->phy[i]);
>  	if (ret)
>  		for (i--; i >= 0; i--)
> -			if (!IS_ERR(exynos_ohci->phy[i]))
> -				phy_power_off(exynos_ohci->phy[i]);
> +			phy_power_off(exynos_ohci->phy[i]);
>  
>  	return ret;
>  }
> @@ -114,8 +105,7 @@ static void exynos_ohci_phy_disable(struct device *dev)
>  	int i;
>  
>  	for (i = 0; i < PHY_NUMBER; i++)
> -		if (!IS_ERR(exynos_ohci->phy[i]))
> -			phy_power_off(exynos_ohci->phy[i]);
> +		phy_power_off(exynos_ohci->phy[i]);
>  }
>  
>  static int exynos_ohci_probe(struct platform_device *pdev)
> -- 
> 2.34.1
> 

-- 
linux-phy mailing list
linux-phy@lists.infradead.org
https://lists.infradead.org/mailman/listinfo/linux-phy

WARNING: multiple messages have this Message-ID (diff)
From: Alan Stern <stern@rowland.harvard.edu>
To: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: "Madalin Bucur" <madalin.bucur@nxp.com>,
	"David S . Miller" <davem@davemloft.net>,
	"Eric Dumazet" <edumazet@google.com>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Paolo Abeni" <pabeni@redhat.com>,
	"Horatiu Vultur" <horatiu.vultur@microchip.com>,
	UNGLinuxDriver@microchip.com,
	"Thierry Reding" <thierry.reding@gmail.com>,
	"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
	"Rob Herring" <robh@kernel.org>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Jonathan Hunter" <jonathanh@nvidia.com>,
	"Vinod Koul" <vkoul@kernel.org>,
	"Kishon Vijay Abraham I" <kishon@kernel.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski@linaro.org>,
	"Alim Akhtar" <alim.akhtar@samsung.com>,
	"Siddharth Vadapalli" <s-vadapalli@ti.com>,
	"Russell King" <linux@armlinux.org.uk>,
	netdev@vger.kernel.org, linux-tegra@vger.kernel.org,
	linux-pci@vger.kernel.org, linux-phy@lists.infradead.org,
	linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org
Subject: Re: [PATCH 7/7] usb: host: ohci-exynos: Convert to devm_of_phy_optional_get()
Date: Wed, 18 Jan 2023 11:18:58 -0500	[thread overview]
Message-ID: <Y8gb8l18XzYOPhoD@rowland.harvard.edu> (raw)
In-Reply-To: <cd685d8e4d6754c384acfc1796065d539a2c3ea8.1674036164.git.geert+renesas@glider.be>

On Wed, Jan 18, 2023 at 11:15:20AM +0100, Geert Uytterhoeven wrote:
> Use the new devm_of_phy_optional_get() helper instead of open-coding the
> same operation.
> 
> This lets us drop several checks for IS_ERR(), as phy_power_{on,off}()
> handle NULL parameters fine.

The patch ignores a possible -ENOSYS error return.  Is it known that 
this will never happen?

Alan Stern

> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
>  drivers/usb/host/ohci-exynos.c | 24 +++++++-----------------
>  1 file changed, 7 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
> index 8d7977fd5d3bd502..8dd9c3b2411c383f 100644
> --- a/drivers/usb/host/ohci-exynos.c
> +++ b/drivers/usb/host/ohci-exynos.c
> @@ -69,19 +69,12 @@ static int exynos_ohci_get_phy(struct device *dev,
>  			return -EINVAL;
>  		}
>  
> -		phy = devm_of_phy_get(dev, child, NULL);
> +		phy = devm_of_phy_optional_get(dev, child, NULL);
>  		exynos_ohci->phy[phy_number] = phy;
>  		if (IS_ERR(phy)) {
> -			ret = PTR_ERR(phy);
> -			if (ret == -EPROBE_DEFER) {
> -				of_node_put(child);
> -				return ret;
> -			} else if (ret != -ENOSYS && ret != -ENODEV) {
> -				dev_err(dev,
> -					"Error retrieving usb2 phy: %d\n", ret);
> -				of_node_put(child);
> -				return ret;
> -			}
> +			of_node_put(child);
> +			return dev_err_probe(dev, PTR_ERR(phy),
> +					     "Error retrieving usb2 phy\n");
>  		}
>  	}
>  
> @@ -97,12 +90,10 @@ static int exynos_ohci_phy_enable(struct device *dev)
>  	int ret = 0;
>  
>  	for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
> -		if (!IS_ERR(exynos_ohci->phy[i]))
> -			ret = phy_power_on(exynos_ohci->phy[i]);
> +		ret = phy_power_on(exynos_ohci->phy[i]);
>  	if (ret)
>  		for (i--; i >= 0; i--)
> -			if (!IS_ERR(exynos_ohci->phy[i]))
> -				phy_power_off(exynos_ohci->phy[i]);
> +			phy_power_off(exynos_ohci->phy[i]);
>  
>  	return ret;
>  }
> @@ -114,8 +105,7 @@ static void exynos_ohci_phy_disable(struct device *dev)
>  	int i;
>  
>  	for (i = 0; i < PHY_NUMBER; i++)
> -		if (!IS_ERR(exynos_ohci->phy[i]))
> -			phy_power_off(exynos_ohci->phy[i]);
> +		phy_power_off(exynos_ohci->phy[i]);
>  }
>  
>  static int exynos_ohci_probe(struct platform_device *pdev)
> -- 
> 2.34.1
> 

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Alan Stern <stern@rowland.harvard.edu>
To: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: "Madalin Bucur" <madalin.bucur@nxp.com>,
	"David S . Miller" <davem@davemloft.net>,
	"Eric Dumazet" <edumazet@google.com>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Paolo Abeni" <pabeni@redhat.com>,
	"Horatiu Vultur" <horatiu.vultur@microchip.com>,
	UNGLinuxDriver@microchip.com,
	"Thierry Reding" <thierry.reding@gmail.com>,
	"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
	"Rob Herring" <robh@kernel.org>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Jonathan Hunter" <jonathanh@nvidia.com>,
	"Vinod Koul" <vkoul@kernel.org>,
	"Kishon Vijay Abraham I" <kishon@kernel.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski@linaro.org>,
	"Alim Akhtar" <alim.akhtar@samsung.com>,
	"Siddharth Vadapalli" <s-vadapalli@ti.com>,
	"Russell King" <linux@armlinux.org.uk>,
	netdev@vger.kernel.org, linux-tegra@vger.kernel.org,
	linux-pci@vger.kernel.org, linux-phy@lists.infradead.org,
	linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org
Subject: Re: [PATCH 7/7] usb: host: ohci-exynos: Convert to devm_of_phy_optional_get()
Date: Wed, 18 Jan 2023 11:18:58 -0500	[thread overview]
Message-ID: <Y8gb8l18XzYOPhoD@rowland.harvard.edu> (raw)
In-Reply-To: <cd685d8e4d6754c384acfc1796065d539a2c3ea8.1674036164.git.geert+renesas@glider.be>

On Wed, Jan 18, 2023 at 11:15:20AM +0100, Geert Uytterhoeven wrote:
> Use the new devm_of_phy_optional_get() helper instead of open-coding the
> same operation.
> 
> This lets us drop several checks for IS_ERR(), as phy_power_{on,off}()
> handle NULL parameters fine.

The patch ignores a possible -ENOSYS error return.  Is it known that 
this will never happen?

Alan Stern

> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
>  drivers/usb/host/ohci-exynos.c | 24 +++++++-----------------
>  1 file changed, 7 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
> index 8d7977fd5d3bd502..8dd9c3b2411c383f 100644
> --- a/drivers/usb/host/ohci-exynos.c
> +++ b/drivers/usb/host/ohci-exynos.c
> @@ -69,19 +69,12 @@ static int exynos_ohci_get_phy(struct device *dev,
>  			return -EINVAL;
>  		}
>  
> -		phy = devm_of_phy_get(dev, child, NULL);
> +		phy = devm_of_phy_optional_get(dev, child, NULL);
>  		exynos_ohci->phy[phy_number] = phy;
>  		if (IS_ERR(phy)) {
> -			ret = PTR_ERR(phy);
> -			if (ret == -EPROBE_DEFER) {
> -				of_node_put(child);
> -				return ret;
> -			} else if (ret != -ENOSYS && ret != -ENODEV) {
> -				dev_err(dev,
> -					"Error retrieving usb2 phy: %d\n", ret);
> -				of_node_put(child);
> -				return ret;
> -			}
> +			of_node_put(child);
> +			return dev_err_probe(dev, PTR_ERR(phy),
> +					     "Error retrieving usb2 phy\n");
>  		}
>  	}
>  
> @@ -97,12 +90,10 @@ static int exynos_ohci_phy_enable(struct device *dev)
>  	int ret = 0;
>  
>  	for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
> -		if (!IS_ERR(exynos_ohci->phy[i]))
> -			ret = phy_power_on(exynos_ohci->phy[i]);
> +		ret = phy_power_on(exynos_ohci->phy[i]);
>  	if (ret)
>  		for (i--; i >= 0; i--)
> -			if (!IS_ERR(exynos_ohci->phy[i]))
> -				phy_power_off(exynos_ohci->phy[i]);
> +			phy_power_off(exynos_ohci->phy[i]);
>  
>  	return ret;
>  }
> @@ -114,8 +105,7 @@ static void exynos_ohci_phy_disable(struct device *dev)
>  	int i;
>  
>  	for (i = 0; i < PHY_NUMBER; i++)
> -		if (!IS_ERR(exynos_ohci->phy[i]))
> -			phy_power_off(exynos_ohci->phy[i]);
> +		phy_power_off(exynos_ohci->phy[i]);
>  }
>  
>  static int exynos_ohci_probe(struct platform_device *pdev)
> -- 
> 2.34.1
> 

  reply	other threads:[~2023-01-18 16:19 UTC|newest]

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-18 10:15 [PATCH treewide 0/7] phy: Add devm_of_phy_optional_get() helper Geert Uytterhoeven
2023-01-18 10:15 ` Geert Uytterhoeven
2023-01-18 10:15 ` Geert Uytterhoeven
2023-01-18 10:15 ` [PATCH 1/7] " Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-19  3:28   ` Jakub Kicinski
2023-01-19  3:28     ` Jakub Kicinski
2023-01-19  3:28     ` Jakub Kicinski
2023-01-19 11:14     ` Vinod Koul
2023-01-19 11:14       ` Vinod Koul
2023-01-19 11:14       ` Vinod Koul
2023-01-19 17:07       ` Jakub Kicinski
2023-01-19 17:07         ` Jakub Kicinski
2023-01-19 17:07         ` Jakub Kicinski
2023-01-18 10:15 ` [PATCH 2/7] net: fman: memac: Convert to devm_of_phy_optional_get() Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-19 23:25   ` Sean Anderson
2023-01-19 23:25     ` Sean Anderson
2023-01-19 23:25     ` Sean Anderson
2023-01-18 10:15 ` [PATCH 3/7] net: lan966x: " Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-20  8:46   ` Steen Hegelund
2023-01-20  8:46     ` Steen Hegelund
2023-01-20  8:46     ` Steen Hegelund
2023-01-18 10:15 ` [PATCH 4/7] net: ethernet: ti: am65-cpsw: " Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-18 10:15 ` [PATCH 5/7] PCI: tegra: " Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-23 18:17   ` Bjorn Helgaas
2023-01-23 18:17     ` Bjorn Helgaas
2023-01-23 18:17     ` Bjorn Helgaas
2023-01-18 10:15 ` [PATCH 6/7] usb: host: ehci-exynos: " Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-19 12:17   ` Greg Kroah-Hartman
2023-01-19 12:17     ` Greg Kroah-Hartman
2023-01-19 12:17     ` Greg Kroah-Hartman
2023-01-18 10:15 ` [PATCH 7/7] usb: host: ohci-exynos: " Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-18 10:15   ` Geert Uytterhoeven
2023-01-18 16:18   ` Alan Stern [this message]
2023-01-18 16:18     ` Alan Stern
2023-01-18 16:18     ` Alan Stern
2023-01-18 16:50     ` Geert Uytterhoeven
2023-01-18 16:50       ` Geert Uytterhoeven
2023-01-18 16:50       ` Geert Uytterhoeven
2023-01-18 17:01       ` Alan Stern
2023-01-18 17:01         ` Alan Stern
2023-01-18 17:01         ` Alan Stern
2023-01-18 17:29   ` Rob Herring
2023-01-18 17:29     ` Rob Herring
2023-01-18 17:29     ` Rob Herring
2023-01-18 18:28     ` Geert Uytterhoeven
2023-01-18 18:28       ` Geert Uytterhoeven
2023-01-18 18:28       ` Geert Uytterhoeven
2023-01-18 19:49       ` Rob Herring
2023-01-18 19:49         ` Rob Herring
2023-01-18 19:49         ` Rob Herring
2023-01-20  7:56         ` Geert Uytterhoeven
2023-01-20  7:56           ` Geert Uytterhoeven
2023-01-20  7:56           ` Geert Uytterhoeven
2023-01-20  8:04           ` Vinod Koul
2023-01-20  8:04             ` Vinod Koul
2023-01-20  8:04             ` Vinod Koul

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