i7core_edac: fix error injection

There were two stupid error injection bugs introduced by wrong
cut-and-paste: one at socket store, and another at the error inject
register. The last one were causing the code to not work at all.

While here, adds debug messages to allow seeing what registers are being
set while sending error injection.

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

drivers/edac/i7core_edac.c

@@ -625,7 +625,7 @@ static int disable_inject(struct mem_ctl_info *mci)
 		return -ENODEV;
 
 	pci_write_config_dword(pvt->pci_ch[pvt->inject.socket][pvt->inject.channel][0],
-				MC_CHANNEL_ERROR_MASK, 0);
+				MC_CHANNEL_ERROR_INJECT, 0);
 
 	return 0;
 }
@@ -646,7 +646,7 @@ static ssize_t i7core_inject_socket_store(struct mem_ctl_info *mci,
 	if ((rc < 0) || (value >= pvt->sockets))
 		return -EIO;
 
-	pvt->inject.section = (u32) value;
+	pvt->inject.socket = (u32) value;
 	return count;
 }
 
@@ -872,6 +872,10 @@ static int write_and_test(struct pci_dev *dev, int where, u32 val)
 	u32 read;
 	int count;
 
+	debugf0("setting pci %02x:%02x.%x reg=%02x value=%08x\n",
+		dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn),
+		where, val);
+
 	for (count = 0; count < 10; count++) {
 		if (count)
 			msleep (100);
@@ -882,8 +886,10 @@ static int write_and_test(struct pci_dev *dev, int where, u32 val)
 			return 0;
 	}
 
-	debugf0("Error Injection Register 0x%02x: Tried to write 0x%08x, "
-		"but read: 0x%08x\n", where, val, read);
+	i7core_printk(KERN_ERR, "Error during set pci %02x:%02x.%x reg=%02x "
+		"write=%08x. Read=%08x\n",
+		dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn),
+		where, val, read);
 
 	return -EINVAL;
 }
@@ -983,15 +989,6 @@ static ssize_t i7core_inject_enable_store(struct mem_ctl_info *mci,
 	pci_write_config_dword(pvt->pci_noncore[pvt->inject.socket],
 			       MC_CFG_CONTROL, 0x2);
 
-#if 0
-	/* Zeroes error count registers */
-	pci_write_config_dword(pvt->pci_mcr[pvt->inject.socket][4],
-			       MC_TEST_ERR_RCV1, 0);
-	pci_write_config_dword(pvt->pci_mcr[pvt->inject.socket][4],
-			       MC_TEST_ERR_RCV0, 0);
-	pvt->ce_count_available[pvt->inject.socket] = 0;
-#endif
-
 	write_and_test(pvt->pci_ch[pvt->inject.socket][pvt->inject.channel][0],
 			       MC_CHANNEL_ADDR_MATCH, mask);
 	write_and_test(pvt->pci_ch[pvt->inject.socket][pvt->inject.channel][0],
@@ -1001,7 +998,7 @@ static ssize_t i7core_inject_enable_store(struct mem_ctl_info *mci,
 			       MC_CHANNEL_ERROR_MASK, pvt->inject.eccmask);
 
 	write_and_test(pvt->pci_ch[pvt->inject.socket][pvt->inject.channel][0],
-			       MC_CHANNEL_ERROR_MASK, injectmask);
+			       MC_CHANNEL_ERROR_INJECT, injectmask);
 
 	/*
 	 * This is something undocumented, based on my tests
@@ -1026,7 +1023,7 @@ static ssize_t i7core_inject_enable_show(struct mem_ctl_info *mci,
 	u32 injectmask;
 
 	pci_read_config_dword(pvt->pci_ch[pvt->inject.socket][pvt->inject.channel][0],
-			       MC_CHANNEL_ERROR_MASK, &injectmask);
+			       MC_CHANNEL_ERROR_INJECT, &injectmask);
 
 	debugf0("Inject error read: 0x%018x\n", injectmask);