[PATCH RESEND v6 13/18] EDAC/mc: Re-use generic unique MC index allocation procedure

[Serge Semin <fancer.lancer@gmail.com>]

The EDAC drivers locally maintaining a statically defined
memory-controllers counter don't care much about the MC index assigned as
long as it's unique so the EDAC core perceives it. Convert these drivers
to be using the generic MC index allocation procedure recently added to
the EDAC core.

Signed-off-by: Serge Semin <fancer.lancer@gmail.com>

---

Changelog v4:
- Initial patch introduction.
---
 drivers/edac/dmc520_edac.c | 4 +---
 drivers/edac/pasemi_edac.c | 5 +----
 drivers/edac/ppc4xx_edac.c | 5 +----
 3 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/edac/dmc520_edac.c b/drivers/edac/dmc520_edac.c
index 4e30b989a1a4..93734a97a67b 100644
--- a/drivers/edac/dmc520_edac.c
+++ b/drivers/edac/dmc520_edac.c
@@ -173,8 +173,6 @@ struct dmc520_edac {
 	int masks[NUMBER_OF_IRQS];
 };
 
-static int dmc520_mc_idx;
-
 static u32 dmc520_read_reg(struct dmc520_edac *pvt, u32 offset)
 {
 	return readl(pvt->reg_base + offset);
@@ -517,7 +515,7 @@ static int dmc520_edac_probe(struct platform_device *pdev)
 	layers[0].size = dmc520_get_rank_count(reg_base);
 	layers[0].is_virt_csrow = true;
 
-	mci = edac_mc_alloc(dmc520_mc_idx++, ARRAY_SIZE(layers), layers, sizeof(*pvt));
+	mci = edac_mc_alloc(EDAC_AUTO_MC_NUM, ARRAY_SIZE(layers), layers, sizeof(*pvt));
 	if (!mci) {
 		edac_printk(KERN_ERR, EDAC_MOD_NAME,
 			    "Failed to allocate memory for mc instance\n");
diff --git a/drivers/edac/pasemi_edac.c b/drivers/edac/pasemi_edac.c
index 1a1c3296ccc8..afebfbda1ea0 100644
--- a/drivers/edac/pasemi_edac.c
+++ b/drivers/edac/pasemi_edac.c
@@ -57,8 +57,6 @@
 #define PASEMI_EDAC_ERROR_GRAIN			64
 
 static int last_page_in_mmc;
-static int system_mmc_id;
-
 
 static u32 pasemi_edac_get_error_info(struct mem_ctl_info *mci)
 {
@@ -203,8 +201,7 @@ static int pasemi_edac_probe(struct pci_dev *pdev,
 	layers[1].type = EDAC_MC_LAYER_CHANNEL;
 	layers[1].size = PASEMI_EDAC_NR_CHANS;
 	layers[1].is_virt_csrow = false;
-	mci = edac_mc_alloc(system_mmc_id++, ARRAY_SIZE(layers), layers,
-			    0);
+	mci = edac_mc_alloc(EDAC_AUTO_MC_NUM, ARRAY_SIZE(layers), layers, 0);
 	if (mci == NULL)
 		return -ENOMEM;
 
diff --git a/drivers/edac/ppc4xx_edac.c b/drivers/edac/ppc4xx_edac.c
index 1eea3341a916..06d267d40a6a 100644
--- a/drivers/edac/ppc4xx_edac.c
+++ b/drivers/edac/ppc4xx_edac.c
@@ -1214,7 +1214,6 @@ static int ppc4xx_edac_probe(struct platform_device *op)
 	const struct device_node *np = op->dev.of_node;
 	struct mem_ctl_info *mci = NULL;
 	struct edac_mc_layer layers[2];
-	static int ppc4xx_edac_instance;
 
 	/*
 	 * At this point, we only support the controller realized on
@@ -1265,7 +1264,7 @@ static int ppc4xx_edac_probe(struct platform_device *op)
 	layers[1].type = EDAC_MC_LAYER_CHANNEL;
 	layers[1].size = ppc4xx_edac_nr_chans;
 	layers[1].is_virt_csrow = false;
-	mci = edac_mc_alloc(ppc4xx_edac_instance, ARRAY_SIZE(layers), layers,
+	mci = edac_mc_alloc(EDAC_AUTO_MC_NUM, ARRAY_SIZE(layers), layers,
 			    sizeof(struct ppc4xx_edac_pdata));
 	if (mci == NULL) {
 		ppc4xx_edac_printk(KERN_ERR, "%pOF: "
@@ -1303,8 +1302,6 @@ static int ppc4xx_edac_probe(struct platform_device *op)
 			goto fail1;
 	}
 
-	ppc4xx_edac_instance++;
-
 	return 0;
 
  fail1:
-- 
2.43.0