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USB: ohci-at91: fix PIO handling in relation with number of ports

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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 <klaus.falkner@solectrix.de>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Stable <stable@vger.kernel.org> [3.4+]
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nicolas Ferre 2012-08-29 11:49:18 +02:00 committed by Greg Kroah-Hartman
parent 26a538b9ea
commit 6fffb77c83
1 changed files with 10 additions and 0 deletions
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10
drivers/usb/host/ohci-at91.c
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@ -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];