yaongtime的专栏

EHCI的interrupt在HCD中被分为了6种类型，如下宏定义： /* these STS_* flags are also intr_enable bits (USBINTR) */ #define STS_IAA (1<<5) /* Interrupted on async advance */ #define STS_FATAL (1<<4) /* such as some

1. static void scan_async (struct ehci_hcd *ehci) 2. { 3.  struct ehci_qh *qh; 4.  bool check_unlinks_later = false; 5.  6.  ehci->qh_scan_next = ehci->async->qh_next.qh; 7.  while (ehci->qh_sca