amd64_edac: Correct DIMM sizes

We were filling the csrow size with a wrong value. 16a528e ("EDAC:
Fix csrow size reported in sysfs") tried to address the issue. It fixed
the report with the old API but not with the new one. Correct it for the
new API too.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[ make it a per-csrow accounting regardless of ->channel_count ]
Signed-off-by: Borislav Petkov <bp@suse.de>

drivers/edac/amd64_edac.c

@@ -2048,12 +2048,18 @@ static int init_csrows(struct mem_ctl_info *mci)
 		edac_dbg(1, "MC node: %d, csrow: %d\n",
 			    pvt->mc_node_id, i);
 
-		if (row_dct0)
+		if (row_dct0) {
 			nr_pages = amd64_csrow_nr_pages(pvt, 0, i);
+			csrow->channels[0]->dimm->nr_pages = nr_pages;
+		}
 
 		/* K8 has only one DCT */
-		if (boot_cpu_data.x86 != 0xf && row_dct1)
-			nr_pages += amd64_csrow_nr_pages(pvt, 1, i);
+		if (boot_cpu_data.x86 != 0xf && row_dct1) {
+			int row_dct1_pages = amd64_csrow_nr_pages(pvt, 1, i);
+
+			csrow->channels[1]->dimm->nr_pages = row_dct1_pages;
+			nr_pages += row_dct1_pages;
+		}
 
 		mtype = amd64_determine_memory_type(pvt, i);
 
@@ -2072,9 +2078,7 @@ static int init_csrows(struct mem_ctl_info *mci)
 			dimm = csrow->channels[j]->dimm;
 			dimm->mtype = mtype;
 			dimm->edac_mode = edac_mode;
-			dimm->nr_pages = nr_pages;
 		}
-		csrow->nr_pages = nr_pages;
 	}
 
 	return empty;

drivers/edac/edac_mc_sysfs.c

@@ -180,9 +180,6 @@ static ssize_t csrow_size_show(struct device *dev,
 	int i;
 	u32 nr_pages = 0;
 
-	if (csrow->mci->csbased)
-		return sprintf(data, "%u\n", PAGES_TO_MiB(csrow->nr_pages));
-
 	for (i = 0; i < csrow->nr_channels; i++)
 		nr_pages += csrow->channels[i]->dimm->nr_pages;
 	return sprintf(data, "%u\n", PAGES_TO_MiB(nr_pages));
@@ -778,14 +775,10 @@ static ssize_t mci_size_mb_show(struct device *dev,
 	for (csrow_idx = 0; csrow_idx < mci->nr_csrows; csrow_idx++) {
 		struct csrow_info *csrow = mci->csrows[csrow_idx];
 
-		if (csrow->mci->csbased) {
-			total_pages += csrow->nr_pages;
-		} else {
-			for (j = 0; j < csrow->nr_channels; j++) {
-				struct dimm_info *dimm = csrow->channels[j]->dimm;
+		for (j = 0; j < csrow->nr_channels; j++) {
+			struct dimm_info *dimm = csrow->channels[j]->dimm;
 
-				total_pages += dimm->nr_pages;
-			}
+			total_pages += dimm->nr_pages;
 		}
 	}
 

include/linux/edac.h

@@ -561,7 +561,6 @@ struct csrow_info {
 
 	u32 ue_count;		/* Uncorrectable Errors for this csrow */
 	u32 ce_count;		/* Correctable Errors for this csrow */
-	u32 nr_pages;		/* combined pages count of all channels */
 
 	struct mem_ctl_info *mci;	/* the parent */