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-rw-r--r--drivers/edac/amd64_edac.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 81dca957fce0..54acd3a7acdc 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -3326,8 +3326,14 @@ static int init_one_instance(unsigned int nid)
* Always allocate two channels since we can have setups with DIMMs on
* only one channel. Also, this simplifies handling later for the price
* of a couple of KBs tops.
+ *
+ * On Fam17h+, the number of controllers may be greater than two. So set
+ * the size equal to the maximum number of UMCs.
*/
- layers[1].size = 2;
+ if (pvt->fam >= 0x17)
+ layers[1].size = num_umcs;
+ else
+ layers[1].size = 2;
layers[1].is_virt_csrow = false;
mci = edac_mc_alloc(nid, ARRAY_SIZE(layers), layers, 0);