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Subject[PATCH 3/9] drivers/usb/host/ehci-cns3xxx.c: use devm_ functions
Date
From: Julia Lawall <Julia.Lawall@lip6.fr>

The various devm_ functions allocate memory that is released when a driver
detaches. This patch uses these functions for data that is allocated in
the probe function of a platform device and is only freed in the remove
function.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
Not compiled.

drivers/usb/host/ehci-cns3xxx.c | 16 ++--------------
1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/host/ehci-cns3xxx.c b/drivers/usb/host/ehci-cns3xxx.c
index caaa3e5..d91708d 100644
--- a/drivers/usb/host/ehci-cns3xxx.c
+++ b/drivers/usb/host/ehci-cns3xxx.c
@@ -105,27 +105,17 @@ static int cns3xxx_ehci_probe(struct platform_device *pdev)
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);

- if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
- driver->description)) {
- dev_dbg(dev, "controller already in use\n");
- retval = -EBUSY;
- goto err1;
- }
-
- hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ hcd->regs = devm_request_and_ioremap(&pdev->dev, res);
if (hcd->regs == NULL) {
dev_dbg(dev, "error mapping memory\n");
retval = -EFAULT;
- goto err2;
+ goto err1;
}

retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (retval == 0)
return retval;

- iounmap(hcd->regs);
-err2:
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
usb_put_hcd(hcd);

@@ -137,8 +127,6 @@ static int cns3xxx_ehci_remove(struct platform_device *pdev)
struct usb_hcd *hcd = platform_get_drvdata(pdev);

usb_remove_hcd(hcd);
- iounmap(hcd->regs);
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

/*
* EHCI and OHCI share the same clock and power,

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