diff options
Diffstat (limited to 'sys/dev/usb/usb_handle_request.c')
| -rw-r--r-- | sys/dev/usb/usb_handle_request.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/sys/dev/usb/usb_handle_request.c b/sys/dev/usb/usb_handle_request.c index a775d67..7f3cdc6 100644 --- a/sys/dev/usb/usb_handle_request.c +++ b/sys/dev/usb/usb_handle_request.c @@ -149,6 +149,7 @@ usb_handle_set_config(struct usb_xfer *xfer, uint8_t conf_no) { struct usb_device *udev = xfer->xroot->udev; usb_error_t err = 0; + uint8_t do_unlock; /* * We need to protect against other threads doing probe and @@ -156,7 +157,8 @@ usb_handle_set_config(struct usb_xfer *xfer, uint8_t conf_no) */ USB_XFER_UNLOCK(xfer); - usbd_enum_lock(udev); + /* Prevent re-enumeration */ + do_unlock = usbd_enum_lock(udev); if (conf_no == USB_UNCONFIG_NO) { conf_no = USB_UNCONFIG_INDEX; @@ -179,7 +181,8 @@ usb_handle_set_config(struct usb_xfer *xfer, uint8_t conf_no) goto done; } done: - usbd_enum_unlock(udev); + if (do_unlock) + usbd_enum_unlock(udev); USB_XFER_LOCK(xfer); return (err); } @@ -221,6 +224,7 @@ usb_handle_iface_request(struct usb_xfer *xfer, int error; uint8_t iface_index; uint8_t temp_state; + uint8_t do_unlock; if ((req.bmRequestType & 0x1F) == UT_INTERFACE) { iface_index = req.wIndex[0]; /* unicast */ @@ -234,7 +238,8 @@ usb_handle_iface_request(struct usb_xfer *xfer, */ USB_XFER_UNLOCK(xfer); - usbd_enum_lock(udev); + /* Prevent re-enumeration */ + do_unlock = usbd_enum_lock(udev); error = ENXIO; @@ -350,17 +355,20 @@ tr_repeat: goto tr_stalled; } tr_valid: - usbd_enum_unlock(udev); + if (do_unlock) + usbd_enum_unlock(udev); USB_XFER_LOCK(xfer); return (0); tr_short: - usbd_enum_unlock(udev); + if (do_unlock) + usbd_enum_unlock(udev); USB_XFER_LOCK(xfer); return (USB_ERR_SHORT_XFER); tr_stalled: - usbd_enum_unlock(udev); + if (do_unlock) + usbd_enum_unlock(udev); USB_XFER_LOCK(xfer); return (USB_ERR_STALLED); } |
