Commit 2d7bbb91 authored by Doug Thompson's avatar Doug Thompson Committed by Linus Torvalds

[PATCH] EDAC: mc numbers refactor 1-of-2

Remove add_mc_to_global_list().  In next patch, this function will be
reimplemented with different semantics.

1 Reimplement add_mc_to_global_list() with semantics that allow the caller to
  determine the ID number for a mem_ctl_info structure.  Then modify
  edac_mc_add_mc() so that the caller specifies the ID number for the new
  mem_ctl_info structure.  Platform-specific code should be able to assign the
  ID numbers in a platform-specific manner.  For instance, on Opteron it makes
  sense to have the ID of the mem_ctl_info structure match the ID of the node
  that the memory controller belongs to.

2 Modify callers of edac_mc_add_mc() so they use the new semantics.
Signed-off-by: default avatarDoug Thompson <norsk5@xmission.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 37f04581
......@@ -257,7 +257,10 @@ static int amd76x_probe1(struct pci_dev *pdev, int dev_idx)
amd76x_get_error_info(mci, &discard); /* clear counters */
if (edac_mc_add_mc(mci)) {
/* Here we assume that we will never see multiple instances of this
* type of memory controller. The ID is therefore hardcoded to 0.
*/
if (edac_mc_add_mc(mci,0)) {
debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
goto fail;
}
......
......@@ -953,7 +953,10 @@ static int e752x_probe1(struct pci_dev *pdev, int dev_idx)
"tolm = %x, remapbase = %x, remaplimit = %x\n", pvt->tolm,
pvt->remapbase, pvt->remaplimit);
if (edac_mc_add_mc(mci)) {
/* Here we assume that we will never see multiple instances of this
* type of memory controller. The ID is therefore hardcoded to 0.
*/
if (edac_mc_add_mc(mci,0)) {
debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
goto fail;
}
......
......@@ -463,7 +463,10 @@ static int e7xxx_probe1(struct pci_dev *pdev, int dev_idx)
/* clear any pending errors, or initial state bits */
e7xxx_get_error_info(mci, &discard);
if (edac_mc_add_mc(mci) != 0) {
/* Here we assume that we will never see multiple instances of this
* type of memory controller. The ID is therefore hardcoded to 0.
*/
if (edac_mc_add_mc(mci,0)) {
debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
goto fail;
}
......
......@@ -1632,47 +1632,46 @@ static struct mem_ctl_info *find_mci_by_dev(struct device *dev)
return NULL;
}
static int add_mc_to_global_list(struct mem_ctl_info *mci)
/* Return 0 on success, 1 on failure.
* Before calling this function, caller must
* assign a unique value to mci->mc_idx.
*/
static int add_mc_to_global_list (struct mem_ctl_info *mci)
{
struct list_head *item, *insert_before;
struct mem_ctl_info *p;
int i;
if (list_empty(&mc_devices)) {
mci->mc_idx = 0;
insert_before = &mc_devices;
} else {
if (find_mci_by_dev(mci->dev)) {
edac_printk(KERN_WARNING, EDAC_MC,
"%s (%s) %s %s already assigned %d\n",
mci->dev->bus_id, dev_name(mci->dev),
mci->mod_name, mci->ctl_name,
mci->mc_idx);
return 1;
}
insert_before = &mc_devices;
insert_before = NULL;
i = 0;
if (unlikely((p = find_mci_by_dev(mci->dev)) != NULL))
goto fail0;
list_for_each(item, &mc_devices) {
p = list_entry(item, struct mem_ctl_info, link);
list_for_each(item, &mc_devices) {
p = list_entry(item, struct mem_ctl_info, link);
if (p->mc_idx != i) {
insert_before = item;
break;
}
if (p->mc_idx >= mci->mc_idx) {
if (unlikely(p->mc_idx == mci->mc_idx))
goto fail1;
i++;
insert_before = item;
break;
}
mci->mc_idx = i;
if (insert_before == NULL)
insert_before = &mc_devices;
}
list_add_tail_rcu(&mci->link, insert_before);
return 0;
fail0:
edac_printk(KERN_WARNING, EDAC_MC,
"%s (%s) %s %s already assigned %d\n", p->dev->bus_id,
dev_name(p->dev), p->mod_name, p->ctl_name, p->mc_idx);
return 1;
fail1:
edac_printk(KERN_WARNING, EDAC_MC,
"bug in low-level driver: attempt to assign\n"
" duplicate mc_idx %d in %s()\n", p->mc_idx, __func__);
return 1;
}
static void complete_mc_list_del(struct rcu_head *head)
......@@ -1696,6 +1695,7 @@ static void del_mc_from_global_list(struct mem_ctl_info *mci)
* edac_mc_add_mc: Insert the 'mci' structure into the mci global list and
* create sysfs entries associated with mci structure
* @mci: pointer to the mci structure to be added to the list
* @mc_idx: A unique numeric identifier to be assigned to the 'mci' structure.
*
* Return:
* 0 Success
......@@ -1703,9 +1703,10 @@ static void del_mc_from_global_list(struct mem_ctl_info *mci)
*/
/* FIXME - should a warning be printed if no error detection? correction? */
int edac_mc_add_mc(struct mem_ctl_info *mci)
int edac_mc_add_mc(struct mem_ctl_info *mci, int mc_idx)
{
debugf0("%s()\n", __func__);
mci->mc_idx = mc_idx;
#ifdef CONFIG_EDAC_DEBUG
if (edac_debug_level >= 3)
edac_mc_dump_mci(mci);
......
......@@ -417,7 +417,7 @@ void edac_mc_dump_mci(struct mem_ctl_info *mci);
void edac_mc_dump_csrow(struct csrow_info *csrow);
#endif /* CONFIG_EDAC_DEBUG */
extern int edac_mc_add_mc(struct mem_ctl_info *mci);
extern int edac_mc_add_mc(struct mem_ctl_info *mci,int mc_idx);
extern struct mem_ctl_info * edac_mc_del_mc(struct device *dev);
extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
unsigned long page);
......
......@@ -208,7 +208,10 @@ static int i82860_probe1(struct pci_dev *pdev, int dev_idx)
i82860_get_error_info(mci, &discard); /* clear counters */
if (edac_mc_add_mc(mci)) {
/* Here we assume that we will never see multiple instances of this
* type of memory controller. The ID is therefore hardcoded to 0.
*/
if (edac_mc_add_mc(mci,0)) {
debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
edac_mc_free(mci);
} else {
......
......@@ -390,7 +390,10 @@ static int i82875p_probe1(struct pci_dev *pdev, int dev_idx)
i82875p_get_error_info(mci, &discard); /* clear counters */
if (edac_mc_add_mc(mci)) {
/* Here we assume that we will never see multiple instances of this
* type of memory controller. The ID is therefore hardcoded to 0.
*/
if (edac_mc_add_mc(mci,0)) {
debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
goto fail3;
}
......
......@@ -304,7 +304,10 @@ static int r82600_probe1(struct pci_dev *pdev, int dev_idx)
r82600_get_error_info(mci, &discard); /* clear counters */
if (edac_mc_add_mc(mci)) {
/* Here we assume that we will never see multiple instances of this
* type of memory controller. The ID is therefore hardcoded to 0.
*/
if (edac_mc_add_mc(mci,0)) {
debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
goto fail;
}
......
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