From: Nicolas Ferre Date: Wed, 29 Aug 2012 09:49:18 +0000 (+0200) Subject: USB: ohci-at91: fix PIO handling in relation with number of ports X-Git-Tag: v3.5.5~103 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=994f290171f0018246612b9cfd890a184d7dd7a6;p=karo-tx-linux.git USB: ohci-at91: fix PIO handling in relation with number of ports commit 6fffb77c8393151b0cf8cef1b9c2ba90587dd2e8 upstream. If the number of ports present on the SoC/board is not the maximum and that the platform data is not filled with all data, there is an easy way to mess the PIO setup for this interface. This quick fix addresses mis-configuration in USB host platform data that is common in at91 boards since commit 0ee6d1e (USB: ohci-at91: change maximum number of ports) that did not modified the associatd board files. Reported-by: Klaus Falkner Signed-off-by: Nicolas Ferre Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index a665b3eaa746..aaa8d2bce217 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -570,6 +570,16 @@ static int __devinit ohci_hcd_at91_drv_probe(struct platform_device *pdev) if (pdata) { at91_for_each_port(i) { + /* + * do not configure PIO if not in relation with + * real USB port on board + */ + if (i >= pdata->ports) { + pdata->vbus_pin[i] = -EINVAL; + pdata->overcurrent_pin[i] = -EINVAL; + break; + } + if (!gpio_is_valid(pdata->vbus_pin[i])) continue; gpio = pdata->vbus_pin[i];