* Re: [PATCH] USB: OHCI: ohci-pxa27x: remove unuseful functions
[not found] <1480536139-3851-1-git-send-email-csmanjuvijay@gmail.com>
@ 2016-11-30 20:36 ` Alan Stern
[not found] ` <1480550389-9421-1-git-send-email-csmanjuvijay@gmail.com>
1 sibling, 0 replies; 2+ messages in thread
From: Alan Stern @ 2016-11-30 20:36 UTC (permalink / raw)
To: csmanjuvijay; +Cc: Greg Kroah-Hartman, linux-usb, linux-kernel
By the way, "unuseful" is not an English word. It should be "useless".
On Wed, 30 Nov 2016 csmanjuvijay@gmail.com wrote:
> From: Manjunath Goudar <csmanjuvijay@gmail.com>
>
> The ohci_hcd_pxa27x_drv_probe function is not doing anything other
> than calling usb_hcd_pxa27x_probe function so ohci_hcd_pxa27x_drv_probe
> function is unuseful that is why removed ohci_hcd_pxa27x_drv_probe
> function and renamed usb_hcd_pxa27x_probe function to
> ohci_hcd_pxa27x_drv_probe for proper naming.
>
> The ohci_hcd_pxa27x_remove function is also not doing anything other than
> calling usb_hcd_pxa27x_remove that is why removed ohci_hcd_pxa27x_remove
> function and renamed usb_hcd_pxa27x_remove to ohci_hcd_pxa27x_remove for
> proper naming.
A few things should be improved.
> Signed-off-by: Manjunath Goudar <csmanjuvijay@gmail.com>
> Cc: Alan Stern <stern@rowland.harvard.edu>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: linux-usb@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> ---
> drivers/usb/host/ohci-pxa27x.c | 41 +++++++++++++++--------------------------
> 1 file changed, 15 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
> index a667cf2..c5efcd1 100644
> --- a/drivers/usb/host/ohci-pxa27x.c
> +++ b/drivers/usb/host/ohci-pxa27x.c
> @@ -404,7 +404,7 @@ static int ohci_pxa_of_init(struct platform_device *pdev)
>
>
> /**
> - * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
> + * ohci_hcd_pxa27x_probe - initialize pxa27x-based HCDs
> * Context: !in_interrupt()
> *
> * Allocates basic resources for this USB host controller, and
> @@ -412,7 +412,7 @@ static int ohci_pxa_of_init(struct platform_device *pdev)
> * through the hotplug entry's driver_data.
> *
> */
> -int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev)
> +static int ohci_hcd_pxa27x_probe (struct platform_device *pdev)
You should remove the space between "probe" and "(". checkpatch.pl
will warn you about this. Didn't you run it?
> {
> int retval, irq;
> struct usb_hcd *hcd;
> @@ -423,6 +423,11 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
> struct clk *usb_clk;
> unsigned int i;
>
> + if (usb_disabled())
> + return -ENODEV;
> +
> + pr_debug ("In ohci_hcd_pxa27x_drv_probe");
> +
Leave these out. The driver already checks for usb_disabled() in
ohci_pxa27x_init(); there's no reason to check it again. And the debug
line seems rather unimportant.
> retval = ohci_pxa_of_init(pdev);
> if (retval)
> return retval;
> @@ -442,7 +447,7 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
> if (IS_ERR(usb_clk))
> return PTR_ERR(usb_clk);
>
> - hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x");
> + hcd = usb_create_hcd (&ohci_pxa27x_hc_driver, &pdev->dev, "pxa27x");
Again, fix up warnings from checkpatch.pl. Here and below.
Alan Stern
> if (!hcd)
> return -ENOMEM;
>
> @@ -503,17 +508,18 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
> /* may be called with controller, bus, and devices active */
>
> /**
> - * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
> + * ohci_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
> * @dev: USB Host Controller being removed
> * Context: !in_interrupt()
> *
> - * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
> + * Reverses the effect of ohci_hcd_pxa27x_probe(), first invoking
> * the HCD's stop() method. It is always called from a thread
> * context, normally "rmmod", "apmd", or something similar.
> *
> */
> -void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
> +static int ohci_hcd_pxa27x_remove (struct platform_device *pdev)
> {
> + struct usb_hcd *hcd = platform_get_drvdata(pdev);
> struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd);
> unsigned int i;
>
> @@ -524,28 +530,11 @@ void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
> pxa27x_ohci_set_vbus_power(pxa_ohci, i, false);
>
> usb_put_hcd(hcd);
> + return 0;
> }
>
> /*-------------------------------------------------------------------------*/
>
> -static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
> -{
> - pr_debug ("In ohci_hcd_pxa27x_drv_probe");
> -
> - if (usb_disabled())
> - return -ENODEV;
> -
> - return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
> -}
> -
> -static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
> -{
> - struct usb_hcd *hcd = platform_get_drvdata(pdev);
> -
> - usb_hcd_pxa27x_remove(hcd, pdev);
> - return 0;
> -}
> -
> #ifdef CONFIG_PM
> static int ohci_hcd_pxa27x_drv_suspend(struct device *dev)
> {
> @@ -598,8 +587,8 @@ static const struct dev_pm_ops ohci_hcd_pxa27x_pm_ops = {
> #endif
>
> static struct platform_driver ohci_hcd_pxa27x_driver = {
> - .probe = ohci_hcd_pxa27x_drv_probe,
> - .remove = ohci_hcd_pxa27x_drv_remove,
> + .probe = ohci_hcd_pxa27x_probe,
> + .remove = ohci_hcd_pxa27x_remove,
> .shutdown = usb_hcd_platform_shutdown,
> .driver = {
> .name = "pxa27x-ohci",
>
^ permalink raw reply [flat|nested] 2+ messages in thread