Using devm_ioremap_resource() API should actually be preferred over devm_ioremap(), since the former request the mem region first and then gives back the ioremap'ed memory pointer. devm_ioremap_resource() calls request_mem_region(), therby preventing other drivers to make any overlapping call to the same region. Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx> --- drivers/usb/host/ehci-spear.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/drivers/usb/host/ehci-spear.c b/drivers/usb/host/ehci-spear.c index 8bd915b..6d84cf2 100644 --- a/drivers/usb/host/ehci-spear.c +++ b/drivers/usb/host/ehci-spear.c @@ -106,15 +106,8 @@ static int spear_ehci_hcd_drv_probe(struct platform_device *pdev) hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); - if (!devm_request_mem_region(&pdev->dev, hcd->rsrc_start, hcd->rsrc_len, - driver->description)) { - retval = -EBUSY; - goto err_put_hcd; - } - - hcd->regs = devm_ioremap(&pdev->dev, hcd->rsrc_start, hcd->rsrc_len); + hcd->regs = devm_ioremap_resource(&pdev->dev, res); if (hcd->regs == NULL) { - dev_dbg(&pdev->dev, "error mapping memory\n"); retval = -ENOMEM; goto err_put_hcd; } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html