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SubjectRe: [PATCH v3] usb: host: uhci-grlib.c : use devm_ functions
On 2014-06-11 20:38, Himangi Saraogi wrote:
> The various devm_ functions allocate memory that is released when a
> driver detaches. This patch uses devm_ioremap_resource for data
> that is allocated in the probe function of a platform device and
> is only freed in the remove function. The corresponding free functions
> are removed and two labels are done away with. Also, linux/device.h
> is added to make sure the devm_*() routine declarations are
> unambiguously available.
>
> Signed-off-by: Himangi Saraogi <himangi774@gmail.com>

Looks and works fine now!

Acked-by: Andreas Larsson <andreas@gaisler.com>

Best regards,
Andreas Larsson

> ---
> Not compile tested due to incompatible architecture.
> v3: pass correct arguments to devm_ioremap_resource
>
> drivers/usb/host/uhci-grlib.c | 31 +++++++++----------------------
> 1 file changed, 9 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/usb/host/uhci-grlib.c b/drivers/usb/host/uhci-grlib.c
> index ab25dc3..05f57ff 100644
> --- a/drivers/usb/host/uhci-grlib.c
> +++ b/drivers/usb/host/uhci-grlib.c
> @@ -17,6 +17,7 @@
> * (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
> */
>
> +#include <linux/device.h>
> #include <linux/of_irq.h>
> #include <linux/of_address.h>
> #include <linux/of_platform.h>
> @@ -113,24 +114,17 @@ static int uhci_hcd_grlib_probe(struct platform_device *op)
> hcd->rsrc_start = res.start;
> hcd->rsrc_len = resource_size(&res);
>
> - if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
> - printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
> - rv = -EBUSY;
> - goto err_rmr;
> - }
> -
> irq = irq_of_parse_and_map(dn, 0);
> if (irq == NO_IRQ) {
> printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
> rv = -EBUSY;
> - goto err_irq;
> + goto err_usb;
> }
>
> - hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
> - if (!hcd->regs) {
> - printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
> - rv = -ENOMEM;
> - goto err_ioremap;
> + hcd->regs = devm_ioremap_resource(&op->dev, &res);
> + if (IS_ERR(hcd->regs)) {
> + rv = PTR_ERR(hcd->regs);
> + goto err_irq;
> }
>
> uhci = hcd_to_uhci(hcd);
> @@ -139,18 +133,14 @@ static int uhci_hcd_grlib_probe(struct platform_device *op)
>
> rv = usb_add_hcd(hcd, irq, 0);
> if (rv)
> - goto err_uhci;
> + goto err_irq;
>
> device_wakeup_enable(hcd->self.controller);
> return 0;
>
> -err_uhci:
> - iounmap(hcd->regs);
> -err_ioremap:
> - irq_dispose_mapping(irq);
> err_irq:
> - release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
> -err_rmr:
> + irq_dispose_mapping(irq);
> +err_usb:
> usb_put_hcd(hcd);
>
> return rv;
> @@ -164,10 +154,7 @@ static int uhci_hcd_grlib_remove(struct platform_device *op)
>
> usb_remove_hcd(hcd);
>
> - iounmap(hcd->regs);
> irq_dispose_mapping(hcd->irq);
> - release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
> -
> usb_put_hcd(hcd);
>
> return 0;
>


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