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Date: Mon, 01 Sep 2008 23:32:27 +0300
From: Vladislav Bogdanov <slava_reg@...s.by>
To: Adrian Bunk <bunk@...nel.org>
CC: Andrew Morton <akpm@...ux-foundation.org>,
Douglas Thompson <dougthompson@...ssion.com>,
Tim Small <tim@...tersideup.com>, Greg KH <greg@...ah.com>,
bluesmoke-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: [PATCH] Make i82443bxgx_edac coexist with intel_agp
Hi all
Here is working patch for 443BX/GX MCH suppport in a EDAC.
It makes i82443bxgx_edac coexist with intel_agp using the same approach
as several other EDAC drivers.
Tested on Intel's L443GX with redhat's 2.6.18 with whole EDAC subsystem
backported a while ago.
I'm not subscribed to lkml so please CC me in replies to that list.
[root@...t ~]# dmesg|grep -iE '(AGP|EDAC)'
Linux agpgart interface v0.101 (c) Dave Jones
agpgart: Detected an Intel 440GX Chipset.
agpgart: AGP aperture is 64M @ 0xf8000000
EDAC MC: Ver: 2.1.0 Jun 27 2008
EDAC MC0: Giving out device to 'i82443bxgx_edac' 'I82443BXGX': DEV 0000:00:00.0
EDAC PCI0: Giving out device to module 'i82443bxgx_edac' controller 'EDAC PCI controller': DEV '0000:00:00.0' (POLLED)
Signed-off-by: Vladislav Bogdanov <slava@...s.by>
---
--- a/drivers/edac/i82443bxgx_edac.c 2008-02-18 15:04:39.000000000 +0200
+++ a/drivers/edac/i82443bxgx_edac.c 2008-09-01 00:14:45.000000000 +0300
@@ -114,6 +114,12 @@ struct i82443bxgx_edacmc_error_info {
static struct edac_pci_ctl_info *i82443bxgx_pci;
+static struct pci_dev *mci_pdev; /* init dev: in case that AGP code has
+ * already registered driver
+ */
+
+static int i82443bxgx_registered = 1;
+
static void i82443bxgx_edacmc_get_error_info(struct mem_ctl_info *mci,
struct i82443bxgx_edacmc_error_info
*info)
@@ -345,10 +351,17 @@ EXPORT_SYMBOL_GPL(i82443bxgx_edacmc_prob
static int __devinit i82443bxgx_edacmc_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
+ int rc;
+
debugf0("MC: " __FILE__ ": %s()\n", __func__);
/* don't need to call pci_device_enable() */
- return i82443bxgx_edacmc_probe1(pdev, ent->driver_data);
+ rc = i82443bxgx_edacmc_probe1(pdev, ent->driver_data);
+
+ if (mci_pdev == NULL)
+ mci_pdev = pci_dev_get(pdev);
+
+ return rc;
}
static void __devexit i82443bxgx_edacmc_remove_one(struct pci_dev *pdev)
@@ -387,15 +400,61 @@ static struct pci_driver i82443bxgx_edac
static int __init i82443bxgx_edacmc_init(void)
{
+ int pci_rc;
/* Ensure that the OPSTATE is set correctly for POLL or NMI */
opstate_init();
- return pci_register_driver(&i82443bxgx_edacmc_driver);
+ pci_rc = pci_register_driver(&i82443bxgx_edacmc_driver);
+ if (pci_rc < 0)
+ goto fail0;
+
+ if (mci_pdev == NULL) {
+ const struct pci_device_id *id = &i82443bxgx_pci_tbl[0];
+ int i = 0;
+ i82443bxgx_registered = 0;
+
+ while (mci_pdev == NULL && id->vendor != 0) {
+ mci_pdev = pci_get_device(id->vendor,
+ id->device, NULL);
+ i++;
+ id = &i82443bxgx_pci_tbl[i];
+ }
+ if (!mci_pdev) {
+ debugf0("i82443bxgx pci_get_device fail\n");
+ pci_rc = -ENODEV;
+ goto fail1;
+ }
+
+ pci_rc = i82443bxgx_edacmc_init_one(mci_pdev, i82443bxgx_pci_tbl);
+
+ if (pci_rc < 0) {
+ debugf0("i82443bxgx init fail\n");
+ pci_rc = -ENODEV;
+ goto fail1;
+ }
+ }
+
+ return 0;
+
+fail1:
+ pci_unregister_driver(&i82443bxgx_edacmc_driver);
+
+fail0:
+ if (mci_pdev != NULL)
+ pci_dev_put(mci_pdev);
+
+ return pci_rc;
}
static void __exit i82443bxgx_edacmc_exit(void)
{
pci_unregister_driver(&i82443bxgx_edacmc_driver);
+
+ if (!i82443bxgx_registered)
+ i82443bxgx_edacmc_remove_one(mci_pdev);
+
+ if (mci_pdev)
+ pci_dev_put(mci_pdev);
}
module_init(i82443bxgx_edacmc_init);
--
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