Greg:
This patch fixes a bug in disconnect handling for the dummy_hcd driver.
After a disconnect the driver would still accept URBs for endpoint 0,
leading to an oops. It also improves the ad-hoc technique used by the
driver to track its gadget's struct usb_device and fixes the way
port-power changes are handled. Please apply.
Alan Stern
===== drivers/usb/gadget/dummy_hcd.c 1.2 vs edited =====
--- 1.2/drivers/usb/gadget/dummy_hcd.c Thu Apr 29 14:16:12 2004
+++ edited/drivers/usb/gadget/dummy_hcd.c Mon May 17 17:12:20 2004
@@ -825,8 +825,7 @@
dum = container_of (hcd, struct dummy, hcd);
spin_lock_irqsave (&dum->lock, flags);
- if (!dum->hdev)
- dum->hdev = urb->dev->hcpriv;
+ dum->hdev = urb->dev->hcpriv;
urb->hcpriv = dum;
if (usb_pipetype (urb->pipe) == PIPE_CONTROL)
urb->error_count = 1; /* mark as a new urb */
@@ -994,10 +993,17 @@
return limit;
}
+#define is_active(dum) ((dum->port_status & \
+ (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
+ USB_PORT_STAT_SUSPEND)) \
+ == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
+
static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address)
{
int i;
+ if (!is_active (dum))
+ return NULL;
if ((address & ~USB_DIR_IN) == 0)
return &dum->ep [0];
for (i = 1; i < DUMMY_ENDPOINTS; i++) {
@@ -1011,6 +1017,8 @@
return NULL;
}
+#undef is_active
+
#define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
#define Dev_InRequest (Dev_Request | USB_DIR_IN)
#define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
@@ -1404,9 +1412,8 @@
break;
case USB_PORT_FEAT_POWER:
dum->port_status = 0;
- dum->address = 0;
- dum->hdev = 0;
dum->resuming = 0;
+ stop_activity(dum, dum->driver);
break;
default:
dum->port_status &= ~(1 << wValue);
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