From: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Date: Sat, 11 Feb 2023 01:17:28 +0000 (+0800)
Subject: EDAC/skx: Fix overflows on the DRAM row address mapping arrays
X-Git-Tag: v6.4-rc1~183^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=71b1e3ba3fed5a34c5fac6d3a15c2634b04c1eb7;p=thirdparty%2Flinux.git

EDAC/skx: Fix overflows on the DRAM row address mapping arrays

The current DRAM row address mapping arrays skx_{open,close}_row[]
only support ranks with sizes up to 16G. Decoding a rank address
to a DRAM row address for a 32G rank by using either one of the
above arrays by the skx_edac driver, will result in an overflow on
the array.

For a 32G rank, the most significant DRAM row address bit (the
bit17) is mapped from the bit34 of the rank address. Add this new
mapping item to both arrays to fix the overflow issue.

Fixes: 4ec656bdf43a ("EDAC, skx_edac: Add EDAC driver for Skylake")
Reported-by: Feng Xu <feng.f.xu@intel.com>
Tested-by: Feng Xu <feng.f.xu@intel.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/all/20230211011728.71764-1-qiuxu.zhuo@intel.com
---

diff --git a/drivers/edac/skx_base.c b/drivers/edac/skx_base.c
index 9397abb42c498..0a862336a7ce8 100644
--- a/drivers/edac/skx_base.c
+++ b/drivers/edac/skx_base.c
@@ -510,7 +510,7 @@ rir_found:
 }
 
 static u8 skx_close_row[] = {
-	15, 16, 17, 18, 20, 21, 22, 28, 10, 11, 12, 13, 29, 30, 31, 32, 33
+	15, 16, 17, 18, 20, 21, 22, 28, 10, 11, 12, 13, 29, 30, 31, 32, 33, 34
 };
 
 static u8 skx_close_column[] = {
@@ -518,7 +518,7 @@ static u8 skx_close_column[] = {
 };
 
 static u8 skx_open_row[] = {
-	14, 15, 16, 20, 28, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33
+	14, 15, 16, 20, 28, 21, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34
 };
 
 static u8 skx_open_column[] = {