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Subject[PATCH 6/7] drivers/usb/host/ehci-vt8500.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-vt8500.c | 15 ++-------------
1 file changed, 2 insertions(+), 13 deletions(-)
diff --git a/drivers/usb/host/ehci-vt8500.c b/drivers/usb/host/ehci-vt8500.c
index 4d147c4..a891617 100644
--- a/drivers/usb/host/ehci-vt8500.c
+++ b/drivers/usb/host/ehci-vt8500.c
@@ -106,17 +106,11 @@ static int vt8500_ehci_drv_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, hcd_name)) {
- pr_debug("request_mem_region failed");
- ret = -EBUSY;
- goto err1;
- }
-
- hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ hcd->regs = devm_request_and_ioremap(&pdev->dev, res);
if (!hcd->regs) {
pr_debug("ioremap failed");
ret = -ENOMEM;
- goto err2;
+ goto err1;
}

ehci = hcd_to_ehci(hcd);
@@ -129,9 +123,6 @@ static int vt8500_ehci_drv_probe(struct platform_device *pdev)
return ret;
}

- iounmap(hcd->regs);
-err2:
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
usb_put_hcd(hcd);
return ret;
@@ -142,8 +133,6 @@ static int vt8500_ehci_drv_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);
usb_put_hcd(hcd);
platform_set_drvdata(pdev, NULL);



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