usb: ohci-at91: fix irq and iomem resource retrieval
authorBoris BREZILLON <b.brezillon@overkiz.com>
Sun, 8 Dec 2013 14:59:59 +0000 (15:59 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 17 Dec 2013 21:22:36 +0000 (13:22 -0800)
When using dt resources retrieval (interrupts and reg properties) there is
no predefined order for these resources in the platform dev resources
table.

Retrieve resources using platform_get_resource and platform_get_irq
functions instead of direct resource table entries to avoid resource type
mismatch.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reviewed-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/ohci-at91.c

index 418444e..8c356af 100644 (file)
@@ -136,23 +136,27 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver,
        struct ohci_hcd *ohci;
        int retval;
        struct usb_hcd *hcd = NULL;
-
-       if (pdev->num_resources != 2) {
-               pr_debug("hcd probe: invalid num_resources");
-               return -ENODEV;
+       struct device *dev = &pdev->dev;
+       struct resource *res;
+       int irq;
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res) {
+               dev_dbg(dev, "hcd probe: missing memory resource\n");
+               return -ENXIO;
        }
 
-       if ((pdev->resource[0].flags != IORESOURCE_MEM)
-                       || (pdev->resource[1].flags != IORESOURCE_IRQ)) {
-               pr_debug("hcd probe: invalid resource type\n");
-               return -ENODEV;
+       irq = platform_get_irq(pdev, 0);
+       if (irq < 0) {
+               dev_dbg(dev, "hcd probe: missing irq resource\n");
+               return irq;
        }
 
        hcd = usb_create_hcd(driver, &pdev->dev, "at91");
        if (!hcd)
                return -ENOMEM;
-       hcd->rsrc_start = pdev->resource[0].start;
-       hcd->rsrc_len = resource_size(&pdev->resource[0]);
+       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\n");
@@ -199,7 +203,7 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver,
        ohci->num_ports = board->ports;
        at91_start_hc(pdev);
 
-       retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED);
+       retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
        if (retval == 0)
                return retval;