static int event_handler(struct usbip_device *ud) { usbip_dbg_eh("enter\n"); /* * Events are handled by only this thread. */ while (usbip_event_happened(ud)) { usbip_dbg_eh("pending event %lx\n", ud->event); /* * NOTE: shutdown must come first. * Shutdown the device. */ if (ud->event & USBIP_EH_SHUTDOWN) { ud->eh_ops.shutdown(ud); ud->event &= ~USBIP_EH_SHUTDOWN; break; } /* Stop the error handler. */ if (ud->event & USBIP_EH_BYE) return -1; /* Reset the device. */ if (ud->event & USBIP_EH_RESET) { ud->eh_ops.reset(ud); ud->event &= ~USBIP_EH_RESET; break; } /* Mark the device as unusable. */ if (ud->event & USBIP_EH_UNUSABLE) { ud->eh_ops.unusable(ud); ud->event &= ~USBIP_EH_UNUSABLE; break; } /* NOTREACHED */ printk(KERN_ERR "%s: unknown event\n", __func__); return -1; } return 0; }
static int event_handler_loop(void *data) { struct usbip_device *ud = data; while (!kthread_should_stop()) { wait_event_interruptible(ud->eh_waitq, usbip_event_happened(ud) || kthread_should_stop()); usbip_dbg_eh("wakeup\n"); if (event_handler(ud) < 0) break; } return 0; }
static int event_handler(struct usbip_device *ud) { usbip_dbg_eh("enter\n"); while (usbip_event_happened(ud)) { usbip_dbg_eh("pending event %lx\n", ud->event); if (ud->event & USBIP_EH_SHUTDOWN) { ud->eh_ops.shutdown(ud); ud->event &= ~USBIP_EH_SHUTDOWN; break; } if (ud->event & USBIP_EH_BYE) return -1; if (ud->event & USBIP_EH_RESET) { ud->eh_ops.reset(ud); ud->event &= ~USBIP_EH_RESET; break; } if (ud->event & USBIP_EH_UNUSABLE) { ud->eh_ops.unusable(ud); ud->event &= ~USBIP_EH_UNUSABLE; break; } printk(KERN_ERR "%s: unknown event\n", __func__); return -1; } return 0; }
static void event_handler_loop(struct usbip_task *ut) { struct usbip_device *ud = container_of(ut, struct usbip_device, eh); while (1) { if (signal_pending(current)) { usbip_dbg_eh("signal catched!\n"); break; } if (event_handler(ud) < 0) break; wait_event_interruptible(ud->eh_waitq, usbip_event_happened(ud)); usbip_dbg_eh("wakeup\n"); } }