From be7ac70b9b1cb49758d52abb554c92c03acd6f08 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Mon, 8 Oct 2012 15:11:46 +0200 Subject: [PATCH] USB: OHCI: make ohci-platform use devm_request_and_ioremap helper This patch changes the ohci-platform driver to use the device managed helper function for requesting memory region and ioremapping memory resources. As a result the error path in the probe function is simplified, and the platform driver remove callback does no longer need to release and iounmap memory resources. devm_request_and_ioremap() will use either the ioremap() or ioremap_nocache() handler depending on the resource's CACHEABLE flag, so we are good with this change. Signed-off-by: Florian Fainelli Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ohci-platform.c | 18 +++--------------- 1 file changed, 3 insertions(+), 15 deletions(-) diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c index 1344426b05a3..bda4e0bb8ab3 100644 --- a/drivers/usb/host/ohci-platform.c +++ b/drivers/usb/host/ohci-platform.c @@ -127,29 +127,19 @@ static int __devinit ohci_platform_probe(struct platform_device *dev) hcd->rsrc_start = res_mem->start; hcd->rsrc_len = resource_size(res_mem); - if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { - dev_err(&dev->dev, "controller already in use"); - err = -EBUSY; - goto err_put_hcd; - } - - hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); + hcd->regs = devm_request_and_ioremap(&dev->dev, res_mem); if (!hcd->regs) { err = -ENOMEM; - goto err_release_region; + goto err_put_hcd; } err = usb_add_hcd(hcd, irq, IRQF_SHARED); if (err) - goto err_iounmap; + goto err_put_hcd; platform_set_drvdata(dev, hcd); return err; -err_iounmap: - iounmap(hcd->regs); -err_release_region: - release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err_put_hcd: usb_put_hcd(hcd); err_power: @@ -165,8 +155,6 @@ static int __devexit ohci_platform_remove(struct platform_device *dev) struct usb_ohci_pdata *pdata = dev->dev.platform_data; usb_remove_hcd(hcd); - iounmap(hcd->regs); - release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); platform_set_drvdata(dev, NULL); -- 2.20.1