[1/2] usb: gadget: udc: atmel: Use devm_ioremap_resource()

[Ladislav Michl <ladis@linux-mips.org>]

On Mon, Jan 22, 2018 at 06:53:38PM +0300, Sergei Shtylyov wrote:
> On 01/22/2018 06:44 PM, Ladislav Michl wrote:
> 
> >>> As devm_ioremap_resource() checks for valid resource,
> >>> make use of it instead of testing ourselves. As a bonus
> >>> memory region is requested.
> >>>
> >>> Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
> >>> ---
> >>>  drivers/usb/gadget/udc/atmel_usba_udc.c | 40 ++++++++++++++++-----------------
> >>>  1 file changed, 19 insertions(+), 21 deletions(-)
> >>>
> >>> diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
> >>> index 075eaaa8a408..403e06e7175f 100644
> >>> --- a/drivers/usb/gadget/udc/atmel_usba_udc.c
> >>> +++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
> >> [...]
> >>> @@ -2284,10 +2284,24 @@ static int usba_udc_probe(struct platform_device *pdev)
> >>>  	udc->gadget = usba_gadget_template;
> >>>  	INIT_LIST_HEAD(&udc->gadget.ep_list);
> >>>  
> >>> -	regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
> >>> -	fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
> >>> -	if (!regs || !fifo)
> >>> -		return -ENXIO;
> >>> +	res = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
> >>> +	udc->regs = devm_ioremap_resource(&pdev->dev, res);
> >>> +	if (IS_ERR(udc->regs)) {
> >>> +		ret = PTR_ERR(udc->regs);
> >>> +		dev_err(&pdev->dev, "Unable to map I/O memory: %d\n", ret);
> >>
> >>    devm_ioremap_resource() prints out the error message.
> > 
> > It does, indeed. However I left both error messages here to distinguish
> > between I/O and FIFO failures.
> 
>    Well, I'm seeing the successfully remapped resource being dumped below, so you can judge the probing progress by that message (and the resource dump done by devm_ioremap_resource())... but if you feel that not enough, OK, leave it as is...

I feel convinced and v2 will follow :-)
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