From: Mauro Carvalho Chehab <mchehab@redhat.com>
Date: Tue, 23 Nov 2010 17:34:04 -0500
Subject: [edac] i7core_edac: fix refcount error at PCI devices
Message-id: <20101123153404.37f518eb@pedra>
Patchwork-id: 29581
O-Subject: [PATCH RHEL5 26/29] BZ#:651869 i7core_edac: Fix refcount error at
	PCI devices
Bugzilla: 651869
RH-Acked-by: Aristeu Rozanski <aris@redhat.com>

Changeset: 79daef2099a02fed35747c23bad22f30441133ea

Probably due to a bug or some testing logic at PCI level, device
refcount for <bus>:00.0 device is decremented at the end of the
pci_get_device, made by i7core_get_all_devices(). The fact is that
the first versions of the driver relied on those devices to probe
for Nehalem, but the current versions don't use it at all.

So, let's just remove those devices from the driver, making it simpler
and fixing the bug.

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

diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c
index fbdb7f6..b69c51f 100644
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -278,7 +278,8 @@ static const struct pci_id_descr pci_dev_descr_i7core_nehalem[] = {
 		/* Memory controller */
 	{ PCI_DESCR(3, 0, PCI_DEVICE_ID_INTEL_I7_MCR)     },
 	{ PCI_DESCR(3, 1, PCI_DEVICE_ID_INTEL_I7_MC_TAD)  },
-			/* Exists only for RDIMM */
+
+		/* Exists only for RDIMM */
 	{ PCI_DESCR(3, 2, PCI_DEVICE_ID_INTEL_I7_MC_RAS), .optional = 1  },
 	{ PCI_DESCR(3, 4, PCI_DEVICE_ID_INTEL_I7_MC_TEST) },
 
@@ -299,16 +300,6 @@ static const struct pci_id_descr pci_dev_descr_i7core_nehalem[] = {
 	{ PCI_DESCR(6, 1, PCI_DEVICE_ID_INTEL_I7_MC_CH2_ADDR) },
 	{ PCI_DESCR(6, 2, PCI_DEVICE_ID_INTEL_I7_MC_CH2_RANK) },
 	{ PCI_DESCR(6, 3, PCI_DEVICE_ID_INTEL_I7_MC_CH2_TC)   },
-
-		/* Generic Non-core registers */
-	/*
-	 * This is the PCI device on i7core and on Xeon 35xx (8086:2c41)
-	 * On Xeon 55xx, however, it has a different id (8086:2c40). So,
-	 * the probing code needs to test for the other address in case of
-	 * failure of this one
-	 */
-	{ PCI_DESCR(0, 0, PCI_DEVICE_ID_INTEL_I7_NONCORE)  },
-
 };
 
 static const struct pci_id_descr pci_dev_descr_lynnfield[] = {
@@ -325,12 +316,6 @@ static const struct pci_id_descr pci_dev_descr_lynnfield[] = {
 	{ PCI_DESCR( 5, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_ADDR) },
 	{ PCI_DESCR( 5, 2, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_RANK) },
 	{ PCI_DESCR( 5, 3, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH1_TC)   },
-
-	/*
-	 * This is the PCI device has an alternate address on some
-	 * processors like Core i7 860
-	 */
-	{ PCI_DESCR( 0, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE)     },
 };
 
 static const struct pci_id_descr pci_dev_descr_i7core_westmere[] = {
@@ -358,10 +343,6 @@ static const struct pci_id_descr pci_dev_descr_i7core_westmere[] = {
 	{ PCI_DESCR(6, 1, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH2_ADDR_REV2) },
 	{ PCI_DESCR(6, 2, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH2_RANK_REV2) },
 	{ PCI_DESCR(6, 3, PCI_DEVICE_ID_INTEL_LYNNFIELD_MC_CH2_TC_REV2)   },
-
-		/* Generic Non-core registers */
-	{ PCI_DESCR(0, 0, PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE_REV2)  },
-
 };
 
 #define PCI_ID_TABLE_ENTRY(A) { .descr=A, .n_devs = ARRAY_SIZE(A) }
@@ -1343,20 +1324,6 @@ static int i7core_get_onedevice(struct pci_dev **prev,
 	pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
 			      dev_descr->dev_id, *prev);
 
-	/*
-	 * On Xeon 55xx, the Intel Quckpath Arch Generic Non-core regs
-	 * is at addr 8086:2c40, instead of 8086:2c41. So, we need
-	 * to probe for the alternate address in case of failure
-	 */
-	if (dev_descr->dev_id == PCI_DEVICE_ID_INTEL_I7_NONCORE && !pdev)
-		pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
-				      PCI_DEVICE_ID_INTEL_I7_NONCORE_ALT, *prev);
-
-	if (dev_descr->dev_id == PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE && !pdev)
-		pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
-				      PCI_DEVICE_ID_INTEL_LYNNFIELD_NONCORE_ALT,
-				      *prev);
-
 	if (!pdev) {
 		if (*prev) {
 			*prev = pdev;