diff options
Diffstat (limited to 'libusb/io.c')
| -rw-r--r-- | libusb/io.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/libusb/io.c b/libusb/io.c index 1e9357c..ef2b7c4 100644 --- a/libusb/io.c +++ b/libusb/io.c @@ -1711,15 +1711,19 @@ int usbi_handle_transfer_cancellation(struct usbi_transfer *transfer) * function will be called the next time an event handler runs. */ void usbi_signal_transfer_completion(struct usbi_transfer *transfer) { - struct libusb_context *ctx = ITRANSFER_CTX(transfer); - int pending_events; + libusb_device_handle *dev_handle = USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer)->dev_handle; - usbi_mutex_lock(&ctx->event_data_lock); - pending_events = usbi_pending_events(ctx); - list_add_tail(&transfer->completed_list, &ctx->completed_transfers); - if (!pending_events) - usbi_signal_event(ctx); - usbi_mutex_unlock(&ctx->event_data_lock); + if (dev_handle) { + struct libusb_context *ctx = HANDLE_CTX(dev_handle); + int pending_events; + + usbi_mutex_lock(&ctx->event_data_lock); + pending_events = usbi_pending_events(ctx); + list_add_tail(&transfer->completed_list, &ctx->completed_transfers); + if (!pending_events) + usbi_signal_event(ctx); + usbi_mutex_unlock(&ctx->event_data_lock); + } } /** \ingroup libusb_poll |