diff options
| -rw-r--r-- | hw/usb/hcd-ehci.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c index a3aea6debe..3e10977492 100644 --- a/hw/usb/hcd-ehci.c +++ b/hw/usb/hcd-ehci.c @@ -1194,6 +1194,15 @@ static void ehci_mem_writel(void *ptr, target_phys_addr_t addr, uint32_t val) val &= ~USBCMD_FLS; } + if (val & USBCMD_IAAD) { + /* + * Process IAAD immediately, otherwise the Linux IAAD watchdog may + * trigger and re-use a qh without us seeing the unlink. + */ + s->async_stepdown = 0; + qemu_bh_schedule(s->async_bh); + } + if (((USBCMD_RUNSTOP | USBCMD_PSE | USBCMD_ASE) & val) != ((USBCMD_RUNSTOP | USBCMD_PSE | USBCMD_ASE) & s->usbcmd)) { if (s->pstate == EST_INACTIVE) { |