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Subject[PATCH] ipmi:pci: Blacklist a Realtek "IPMI" device
Date
From: Corey Minyard <cminyard@mvista.com>

Realtek has some sort of "Virtual" IPMI device on the PCI bus as a
KCS controller, but whatever it is, it's not one. Ignore it if seen.

Reported-by: Chris Chiu <chiu@endlessm.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
---

I haven't heard anything from you on this. Here is a patch that should
blacklist that device, though I don't have a way to easily test it.
If you would prefer this, could you test it?

drivers/char/ipmi/ipmi_si_pci.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/char/ipmi/ipmi_si_pci.c b/drivers/char/ipmi/ipmi_si_pci.c
index 27dd11c..d24990b 100644
--- a/drivers/char/ipmi/ipmi_si_pci.c
+++ b/drivers/char/ipmi/ipmi_si_pci.c
@@ -65,6 +65,15 @@ static int ipmi_pci_probe_regspacing(struct si_sm_io *io)
return DEFAULT_REGSPACING;
}

+static struct pci_device_id ipmi_pci_blacklist[] = {
+ /*
+ * This is a "Virtual IPMI device", whatever that is. It appears
+ * as a KCS device by the class, but it is not one.
+ */
+ { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x816c) },
+ { 0, }
+};
+
static int ipmi_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
@@ -72,6 +81,9 @@ static int ipmi_pci_probe(struct pci_dev *pdev,
int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
struct si_sm_io io;

+ if (pci_match_id(ipmi_pci_blacklist, pdev))
+ return -ENODEV;
+
memset(&io, 0, sizeof(io));
io.addr_source = SI_PCI;
dev_info(&pdev->dev, "probing via PCI");
--
2.7.4
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