[PATCH 2/7] EDAC/aspeed: Set the DIMM grain

[Ryan Chen]

The driver never sets dimm->grain, leaving it zero. Since commit
3724ace582d9 ("EDAC/mc: Fix grain_bits calculation")
edac_raw_mc_handle_error() runs WARN_ON_ONCE(!e->grain) and forces the
grain to 1, so the first ECC error reported on any Aspeed BMC SoC emits a
warning splat, e.g. on the AST2600:

  WARNING: CPU: 0 PID: 0 at drivers/edac/edac_mc.c:924 edac_raw_mc_handle_error+0x4b4/0x604
  ...
  edac_raw_mc_handle_error from edac_mc_handle_error+0x364/0x4a8
  edac_mc_handle_error from count_rec+0xdc/0x124
  count_rec from mcr_isr+0x110/0x1e8

Fixes: 9b7e6242ee4e ("EDAC, aspeed: Add an Aspeed AST2500 EDAC driver")
Cc: stable at vger.kernel.org
Signed-off-by: Ryan Chen <ryan_chen at aspeedtech.com>
---
 drivers/edac/aspeed_edac.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/edac/aspeed_edac.c b/drivers/edac/aspeed_edac.c
index 6e069b255595..83d60414f89a 100644
--- a/drivers/edac/aspeed_edac.c
+++ b/drivers/edac/aspeed_edac.c
@@ -266,6 +266,7 @@ static int init_csrows(struct mem_ctl_info *mci)
 	dimm->mtype = dram_type;
 	dimm->edac_mode = EDAC_SECDED;
 	dimm->nr_pages = nr_pages / csrow->nr_channels;
+	dimm->grain = 16;
 
 	dev_dbg(mci->pdev, "initialized dimm with first_page=0x%lx and nr_pages=0x%x\n",
 		csrow->first_page, nr_pages);

-- 
2.34.1