linux-kernel - [PATCH 1/3] EDAC: Fix in e752x mc driver

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Date:	Wed, 13 Dec 2006 17:17:45 -0800 (PST)
From:	Doug Thompson <norsk5@...oo.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] EDAC: Fix in e752x mc driver

From: Mike Chan <mikechan@...gle.com>

Diff against 2.6.19

This fix/change returns the offset into the page for
the ce/ue error, instead of just 0. The e752x dram controller reads
34:6 of the
linear address with the error.

Mike Chan

Signed-off-by: Mike Chan <mikechan@...gle.com>
Signed-off-by: doug thompson <norsk5@...ssion.com>

---

 e752x_edac.c |   17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

Index: linux-2.6.19/drivers/edac/e752x_edac.c
===================================================================
--- linux-2.6.19.orig/drivers/edac/e752x_edac.c
+++ linux-2.6.19/drivers/edac/e752x_edac.c
@@ -285,8 +285,9 @@ static void do_process_ce(struct mem_ctl
 	if (!pvt->map_type)
 		row = 7 - row;
 
-	edac_mc_handle_ce(mci, page, 0, sec1_syndrome, row, channel,
-		"e752x CE");
+	/* e752x mc reads 34:6 of the DRAM linear address */
+	edac_mc_handle_ce(mci, page, offset_in_page(sec1_add << 4),
+			sec1_syndrome, row, channel, "e752x CE");
 }
 
 static inline void process_ce(struct mem_ctl_info *mci, u16 error_one,
@@ -319,8 +320,10 @@ static void do_process_ue(struct mem_ctl
 			((block_page >> 1) & 3) :
 			edac_mc_find_csrow_by_page(mci, block_page);
 
-		edac_mc_handle_ue(mci, block_page, 0, row,
-			"e752x UE from Read");
+		/* e752x mc reads 34:6 of the DRAM linear address */
+		edac_mc_handle_ue(mci, block_page,
+					offset_in_page(error_2b << 4),
+					row, "e752x UE from Read");
 	}
 	if (error_one & 0x0404) {
 		error_2b = scrb_add;
@@ -333,8 +336,10 @@ static void do_process_ue(struct mem_ctl
 			((block_page >> 1) & 3) :
 			edac_mc_find_csrow_by_page(mci, block_page);
 
-		edac_mc_handle_ue(mci, block_page, 0, row,
-				"e752x UE from Scruber");
+		/* e752x mc reads 34:6 of the DRAM linear address */
+		edac_mc_handle_ue(mci, block_page,
+					offset_in_page(error_2b << 4),
+					row, "e752x UE from Scruber");
 	}
 }

-
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