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i7core_edac: First store, then increment 

Fix ringbuffer store logic.

While here, add a few comments to the code and remove the undesired
printk that could otherwise be called during NMI time.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2009-10-05 09:40:09 -03:00
parent 4f87fad1d3
commit 6e103be1c7
1 changed files with 6 additions and 7 deletions
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13
drivers/edac/i7core_edac.c
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@ -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)