From: Mauro Carvalho Chehab <mchehab@redhat.com>
Date: Tue, 28 Sep 2010 14:34:07 -0400
Subject: [edac] i7300_edac: add error registers cleanup support
Message-id: <20100928113407.5c66799c@pedra>
Patchwork-id: 28471
O-Subject: [PATCH RHEL5 12/27] i7300_edac: Add a code to cleanup error registers
Bugzilla: 487428
RH-Acked-by: Prarit Bhargava <prarit@redhat.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>

diff --git a/drivers/edac/i7300_edac.c b/drivers/edac/i7300_edac.c
index 728f9b0..3b6da20 100644
--- a/drivers/edac/i7300_edac.c
+++ b/drivers/edac/i7300_edac.c
@@ -470,9 +470,34 @@ static void i7300_process_error_info(struct mem_ctl_info *mci,
  */
 static void i7300_clear_error(struct mem_ctl_info *mci)
 {
-	struct i7300_error_info info;
+	struct i7300_pvt *pvt = mci->pvt_info;
+	u32 value;
+	/*
+	 * All error values are RWC - we need to read and write 1 to the
+	 * bit that we want to cleanup
+	 */
 
-	i7300_get_error_info(mci, &info);
+	/* Clear global error registers */
+	pci_read_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
+			      FERR_GLOBAL_HI, &value);
+	pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
+			      FERR_GLOBAL_HI, value);
+
+	pci_read_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
+			      FERR_GLOBAL_LO, &value);
+	pci_write_config_dword(pvt->pci_dev_16_2_fsb_err_regs,
+			      FERR_GLOBAL_LO, value);
+
+	/* Clear FBD error registers */
+	pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
+			      FERR_FAT_FBD, &value);
+	pci_write_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
+			      FERR_FAT_FBD, value);
+
+	pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
+			      FERR_NF_FBD, &value);
+	pci_write_config_dword(pvt->pci_dev_16_1_fsb_addr_map,
+			      FERR_NF_FBD, value);
 }
 
 /*