diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/edac/i7core_edac.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c index 477b62a74db..59ec4417556 100644 --- a/drivers/edac/i7core_edac.c +++ b/drivers/edac/i7core_edac.c @@ -1678,6 +1678,8 @@ static void i7core_check_error(struct mem_ctl_info *mci) * This routine simply queues mcelog errors, and * return. The error itself should be handled later * by i7core_check_error. + * WARNING: As this routine should be called at NMI time, extra care should + * be taken to avoid deadlocks, and to be as fast as possible. */ static int i7core_mce_check_error(void *priv, struct mce *mce) { @@ -1696,13 +1698,8 @@ static int i7core_mce_check_error(void *priv, struct mce *mce) return 0; /* Only handle if it is the right mc controller */ - if (cpu_data(mce->cpu).phys_proc_id != pvt->i7core_dev->socket) { - debugf0("mc%d: ignoring mce log for socket %d. " - "Another mc should get it.\n", - pvt->i7core_dev->socket, - cpu_data(mce->cpu).phys_proc_id); + if (cpu_data(mce->cpu).phys_proc_id != pvt->i7core_dev->socket) return 0; - } smp_rmb(); if ((pvt->mce_out + 1) % sizeof(mce_entry) == pvt->mce_in) { @@ -1710,9 +1707,11 @@ static int i7core_mce_check_error(void *priv, struct mce *mce) pvt->mce_overrun++; return 0; } + + /* Copy memory error at the ringbuffer */ + memcpy(&pvt->mce_entry[pvt->mce_out], mce, sizeof(*mce)); smp_wmb(); pvt->mce_out = (pvt->mce_out + 1) % sizeof(mce_entry); - memcpy(&pvt->mce_entry[pvt->mce_out], mce, sizeof(*mce)); /* Handle fatal errors immediately */ if (mce->mcgstatus & 1) |