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path: root/drivers/usb/misc/usbtest.c
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Diffstat (limited to 'drivers/usb/misc/usbtest.c')
-rw-r--r--drivers/usb/misc/usbtest.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 268148de971..8b4ca1cb450 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -13,6 +13,12 @@
/*-------------------------------------------------------------------------*/
+static int override_alt = -1;
+module_param_named(alt, override_alt, int, 0644);
+MODULE_PARM_DESC(alt, ">= 0 to override altsetting selection");
+
+/*-------------------------------------------------------------------------*/
+
/* FIXME make these public somewhere; usbdevfs.h? */
struct usbtest_param {
/* inputs */
@@ -103,6 +109,10 @@ get_endpoints(struct usbtest_dev *dev, struct usb_interface *intf)
iso_in = iso_out = NULL;
alt = intf->altsetting + tmp;
+ if (override_alt >= 0 &&
+ override_alt != alt->desc.bAlternateSetting)
+ continue;
+
/* take the first altsetting with in-bulk + out-bulk;
* ignore other endpoints and altsettings.
*/
@@ -144,6 +154,7 @@ try_iso:
found:
udev = testdev_to_usbdev(dev);
+ dev->info->alt = alt->desc.bAlternateSetting;
if (alt->desc.bAlternateSetting != 0) {
tmp = usb_set_interface(udev,
alt->desc.bInterfaceNumber,
@@ -2280,7 +2291,7 @@ usbtest_probe(struct usb_interface *intf, const struct usb_device_id *id)
wtest = " intr-out";
}
} else {
- if (info->autoconf) {
+ if (override_alt >= 0 || info->autoconf) {
int status;
status = get_endpoints(dev, intf);