Patch "x86 EDAC, sb_edac.c: Repair damage introduced when "fixing" channel address" has been added to the 4.5-stable tree

This is a note to let you know that I've just added the patch titled

x86 EDAC, sb_edac.c: Repair damage introduced when "fixing" channel address

to the 4.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
x86-edac-sb_edac.c-repair-damage-introduced-when-fixing-channel-address.patch
and it can be found in the queue-4.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Tony Luck <[email protected]>
Date: Thu, 14 Apr 2016 10:21:52 -0700
Subject: x86 EDAC, sb_edac.c: Repair damage introduced when "fixing" channel address

From: Tony Luck <[email protected]>

commit ff15e95c82768d589957dbb17d7eb7dba7904659 upstream.

In commit:

eb1af3b71f9d ("Fix computation of channel address")

I switched the "sck_way" variable from holding the log2 value read from the h/w to instead be the actual number. Unfortunately it is needed in log2 form when used to shift the address.

---
 drivers/edac/sb_edac.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

@@ -2118,7 +2118,7 @@ static int get_memory_error_data(struct
 	}
 
 	ch_way = TAD_CH(reg) + 1;
-	sck_way = 1 << TAD_SOCK(reg);
+	sck_way = TAD_SOCK(reg);
 
 	if (ch_way == 3)
 		idx = addr >> 6;

@@ -2157,7 +2157,7 @@ static int get_memory_error_data(struct
 		switch(ch_way) {
 		case 2:
 		case 4:
-			sck_xch = 1 << sck_way * (ch_way >> 1);
+			sck_xch = (1 << sck_way) * (ch_way >> 1);
 			break;
 		default:
 			sprintf(msg, "Invalid mirror set. Can't decode addr");

@@ -2193,7 +2193,7 @@ static int get_memory_error_data(struct
 
 	ch_addr = addr - offset;
 	ch_addr >>= (6 + shiftup);
-	ch_addr /= ch_way * sck_way;
+	ch_addr /= sck_xch;
 	ch_addr <<= (6 + shiftup);
 	ch_addr |= addr & ((1 << (6 + shiftup)) - 1);
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.5/x86-edac-sb_edac.c-repair-damage-introduced-when-fixing-channel-address.patch queue-4.5/x86-mce-avoid-using-object-after-free-in-genpool.patch queue-4.5/x86-edac-sb_edac.c-take-account-of-channel-hashing-when-needed.patch