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Date: Sun, 21 May 2017 02:52:13 +0900
From: Masahiro Yamada <yamada.masahiro@...ionext.com>
To: linux-usb@...r.kernel.org
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>,
Patrice Chotard <patrice.chotard@...com>,
Alan Stern <stern@...land.harvard.edu>,
Felipe Balbi <balbi@...nel.org>, linuxppc-dev@...ts.ozlabs.org,
linux-kernel@...r.kernel.org, Li Yang <leoli@...escale.com>,
Tony Prisk <linux@...sktech.co.nz>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
John Youn <johnyoun@...opsys.com>,
linux-arm-kernel@...ts.infradead.org, kernel@...inux.com
Subject: [PATCH] usb: remove NULL pointer check for clk_disable_unprepare
After long term efforts of fixing non-common clock implementations,
clk_disable() is a no-op for a NULL pointer input, and this is now
tree-wide consistent.
All clock consumers can safely call clk_disable(_unprepare) without
NULL pointer check.
Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---
drivers/usb/dwc2/platform.c | 3 +--
drivers/usb/gadget/udc/fsl_mxc_udc.c | 3 +--
drivers/usb/host/ehci-mxc.c | 8 ++------
drivers/usb/host/ehci-platform.c | 3 +--
drivers/usb/host/ehci-spear.c | 3 +--
drivers/usb/host/ehci-st.c | 3 +--
drivers/usb/host/fsl-mph-dr-of.c | 3 +--
drivers/usb/host/ohci-platform.c | 3 +--
drivers/usb/host/ohci-spear.c | 3 +--
drivers/usb/host/ohci-st.c | 3 +--
drivers/usb/misc/usb3503.c | 9 +++------
11 files changed, 14 insertions(+), 30 deletions(-)
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index daf0d37..8c5bf81 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -182,8 +182,7 @@ static int __dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)
if (ret)
return ret;
- if (hsotg->clk)
- clk_disable_unprepare(hsotg->clk);
+ clk_disable_unprepare(hsotg->clk);
ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
hsotg->supplies);
diff --git a/drivers/usb/gadget/udc/fsl_mxc_udc.c b/drivers/usb/gadget/udc/fsl_mxc_udc.c
index f16e149..59dbcf7 100644
--- a/drivers/usb/gadget/udc/fsl_mxc_udc.c
+++ b/drivers/usb/gadget/udc/fsl_mxc_udc.c
@@ -118,8 +118,7 @@ int fsl_udc_clk_finalize(struct platform_device *pdev)
void fsl_udc_clk_release(void)
{
- if (mxc_per_clk)
- clk_disable_unprepare(mxc_per_clk);
+ clk_disable_unprepare(mxc_per_clk);
clk_disable_unprepare(mxc_ahb_clk);
clk_disable_unprepare(mxc_ipg_clk);
}
diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c
index c7a9b31..1db5ef9 100644
--- a/drivers/usb/host/ehci-mxc.c
+++ b/drivers/usb/host/ehci-mxc.c
@@ -155,9 +155,7 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev)
if (pdata && pdata->exit)
pdata->exit(pdev);
err_init:
- if (priv->phyclk)
- clk_disable_unprepare(priv->phyclk);
-
+ clk_disable_unprepare(priv->phyclk);
clk_disable_unprepare(priv->ahbclk);
err_clk_ahb:
clk_disable_unprepare(priv->usbclk);
@@ -183,9 +181,7 @@ static int ehci_mxc_drv_remove(struct platform_device *pdev)
clk_disable_unprepare(priv->usbclk);
clk_disable_unprepare(priv->ahbclk);
-
- if (priv->phyclk)
- clk_disable_unprepare(priv->phyclk);
+ clk_disable_unprepare(priv->phyclk);
usb_put_hcd(hcd);
return 0;
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index bc7b9be..2d41447 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -127,8 +127,7 @@ static void ehci_platform_power_off(struct platform_device *dev)
}
for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--)
- if (priv->clks[clk])
- clk_disable_unprepare(priv->clks[clk]);
+ clk_disable_unprepare(priv->clks[clk]);
}
static struct hc_driver __read_mostly ehci_platform_hc_driver;
diff --git a/drivers/usb/host/ehci-spear.c b/drivers/usb/host/ehci-spear.c
index 1f25c79..57257aa 100644
--- a/drivers/usb/host/ehci-spear.c
+++ b/drivers/usb/host/ehci-spear.c
@@ -138,8 +138,7 @@ static int spear_ehci_hcd_drv_remove(struct platform_device *pdev)
usb_remove_hcd(hcd);
- if (sehci->clk)
- clk_disable_unprepare(sehci->clk);
+ clk_disable_unprepare(sehci->clk);
usb_put_hcd(hcd);
return 0;
diff --git a/drivers/usb/host/ehci-st.c b/drivers/usb/host/ehci-st.c
index be4a278..f3c433d 100644
--- a/drivers/usb/host/ehci-st.c
+++ b/drivers/usb/host/ehci-st.c
@@ -130,8 +130,7 @@ static void st_ehci_platform_power_off(struct platform_device *dev)
phy_exit(priv->phy);
for (clk = USB_MAX_CLKS - 1; clk >= 0; clk--)
- if (priv->clks[clk])
- clk_disable_unprepare(priv->clks[clk]);
+ clk_disable_unprepare(priv->clks[clk]);
}
diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
index e90ddb5..ec5562d 100644
--- a/drivers/usb/host/fsl-mph-dr-of.c
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -325,8 +325,7 @@ static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
pdata->regs = NULL;
- if (pdata->clk)
- clk_disable_unprepare(pdata->clk);
+ clk_disable_unprepare(pdata->clk);
}
static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index 6368fce..200137a 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -94,8 +94,7 @@ static void ohci_platform_power_off(struct platform_device *dev)
}
for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
- if (priv->clks[clk])
- clk_disable_unprepare(priv->clks[clk]);
+ clk_disable_unprepare(priv->clks[clk]);
}
static struct hc_driver __read_mostly ohci_platform_hc_driver;
diff --git a/drivers/usb/host/ohci-spear.c b/drivers/usb/host/ohci-spear.c
index 56478ed..4037130 100644
--- a/drivers/usb/host/ohci-spear.c
+++ b/drivers/usb/host/ohci-spear.c
@@ -111,8 +111,7 @@ static int spear_ohci_hcd_drv_remove(struct platform_device *pdev)
struct spear_ohci *sohci_p = to_spear_ohci(hcd);
usb_remove_hcd(hcd);
- if (sohci_p->clk)
- clk_disable_unprepare(sohci_p->clk);
+ clk_disable_unprepare(sohci_p->clk);
usb_put_hcd(hcd);
return 0;
diff --git a/drivers/usb/host/ohci-st.c b/drivers/usb/host/ohci-st.c
index 02816a1..05ede9d 100644
--- a/drivers/usb/host/ohci-st.c
+++ b/drivers/usb/host/ohci-st.c
@@ -112,8 +112,7 @@ static void st_ohci_platform_power_off(struct platform_device *dev)
phy_exit(priv->phy);
for (clk = USB_MAX_CLKS - 1; clk >= 0; clk--)
- if (priv->clks[clk])
- clk_disable_unprepare(priv->clks[clk]);
+ clk_disable_unprepare(priv->clks[clk]);
}
static struct hc_driver __read_mostly ohci_platform_hc_driver;
diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c
index 8e7737d..1d4d1e4 100644
--- a/drivers/usb/misc/usb3503.c
+++ b/drivers/usb/misc/usb3503.c
@@ -335,8 +335,7 @@ static int usb3503_i2c_remove(struct i2c_client *i2c)
struct usb3503 *hub;
hub = i2c_get_clientdata(i2c);
- if (hub->clk)
- clk_disable_unprepare(hub->clk);
+ clk_disable_unprepare(hub->clk);
return 0;
}
@@ -359,8 +358,7 @@ static int usb3503_platform_remove(struct platform_device *pdev)
struct usb3503 *hub;
hub = platform_get_drvdata(pdev);
- if (hub->clk)
- clk_disable_unprepare(hub->clk);
+ clk_disable_unprepare(hub->clk);
return 0;
}
@@ -373,8 +371,7 @@ static int usb3503_i2c_suspend(struct device *dev)
usb3503_switch_mode(hub, USB3503_MODE_STANDBY);
- if (hub->clk)
- clk_disable_unprepare(hub->clk);
+ clk_disable_unprepare(hub->clk);
return 0;
}
--
2.7.4
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