diff options
| -rw-r--r-- | sys/dev/em/if_em.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/dev/em/if_em.c b/sys/dev/em/if_em.c index 8f8f465571ec..081a24332f6e 100644 --- a/sys/dev/em/if_em.c +++ b/sys/dev/em/if_em.c @@ -1048,6 +1048,15 @@ em_intr(void *arg) else if (reg_icr == 0) break; + /* + * XXX: some laptops trigger several spurious interrupts + * on em(4) when in the resume cycle. The ICR register + * reports all-ones value in this case. Processing such + * interrupts would lead to a freeze. I don't know why. + */ + if (reg_icr == 0xffffffff) + break; + if (ifp->if_drv_flags & IFF_DRV_RUNNING) { em_process_receive_interrupts(adapter, -1); em_clean_transmit_interrupts(adapter); |