This patch fixes bugs in usbdcore*.c related to the use of devices
with multiple configurations.
The original code made mistakes about the meaning of configuration value and
configuration index, and the resulting off-by-one errors resulted in:
* SET_CONFIGURATION always selected the first configuration, no matter what
wValue is being passed.
* GET_DESCRIPTOR/CONFIGURATION always returned the descriptor for the first
configuration (index 0).
Signed-off-by: Harald Welte <[EMAIL PROTECTED]>
diff --git a/drivers/usb/usbdcore.c b/drivers/usb/usbdcore.c
index 65a5724..a2e6711 100644
--- a/drivers/usb/usbdcore.c
+++ b/drivers/usb/usbdcore.c
@@ -147,12 +147,9 @@ struct usb_string_descriptor *usbd_get_string (__u8 index)
static struct usb_configuration_instance *usbd_device_configuration_instance
(struct usb_device_instance *device,
unsigned int port, unsigned int configuration)
{
- /* XXX */
- configuration = configuration ? configuration - 1 : 0;
-
- if (configuration >= device->configurations) {
+ if (configuration >= device->configurations)
return NULL;
- }
+
return device->configuration_instance_array + configuration;
}
diff --git a/drivers/usb/usbdcore_ep0.c b/drivers/usb/usbdcore_ep0.c
index 2c89304..d9808f9 100644
--- a/drivers/usb/usbdcore_ep0.c
+++ b/drivers/usb/usbdcore_ep0.c
@@ -237,8 +237,8 @@ static int ep0_get_descriptor (struct usb_device_instance
*device,
return -1;
}
/*dbg_ep0(2, "%d %d", index,
device_descriptor->bNumConfigurations); */
- if (index > device_descriptor->bNumConfigurations) {
- dbg_ep0 (0, "index too large: %d > %d", index,
+ if (index >= device_descriptor->bNumConfigurations) {
+ dbg_ep0 (0, "index too large: %d >= %d", index,
device_descriptor->
bNumConfigurations);
return -1;
@@ -612,14 +612,8 @@ int ep0_recv_setup (struct urb *urb)
case USB_REQ_SET_CONFIGURATION:
/* c.f. 9.4.7 - the top half of wValue is reserved */
- /* */
- if ((device->configuration =
- le16_to_cpu (request->wValue) & 0xFF80) != 0) {
- /* c.f. 9.4.7 - zero is the default or
addressed state, in our case this */
- /* is the same is configuration zero */
- serial_printf("error setting dev->config to
zero!\n");
- device->configuration = 0; /* TBR - ??????
*/
- }
+ device->configuration = le16_to_cpu(request->wValue) &
0xff;
+
/* reset interface and alternate settings */
device->interface = device->alternate = 0;
--
- Harald Welte <[EMAIL PROTECTED]> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
signature.asc
Description: Digital signature
------------------------------------------------------------------------- Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08
_______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
