| From | Paul Gortmaker <> | Subject | [34-longterm 042/179] PCI: Add quirk for setting valid class for TI816X Endpoint | Date | Mon, 14 May 2012 22:12:18 -0400 |
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From: Hemant Pedanekar <hemantp@ti.com>
------------------- This is a commit scheduled for the next v2.6.34 longterm release. http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git If you see a problem with using this for longterm, please comment. -------------------
commit 63c4408074cbcc070ac17fc10e524800eb9bd0b0 upstream.
TI816X (common name for DM816x/C6A816x/AM389x family) devices configured to boot as PCIe Endpoint have class code = 0. This makes kernel PCI bus code to skip allocating BARs to these devices resulting into following type of error when trying to enable them:
"Device 0000:01:00.0 not available because of resource collisions"
The device cannot be operated because of the above issue.
This patch adds a ID specific (TI VENDOR ID and 816X DEVICE ID based) 'early' fixup quirk to replace class code with PCI_CLASS_MULTIMEDIA_VIDEO as class.
Signed-off-by: Hemant Pedanekar <hemantp@ti.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> --- drivers/pci/quirks.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 46aca60..6938fdc 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2682,6 +2682,16 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x342e, vtd_mask_spec_errors); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x3c28, vtd_mask_spec_errors); #endif +static void __devinit fixup_ti816x_class(struct pci_dev* dev) +{ + /* TI 816x devices do not have class code set when in PCIe boot mode */ + if (dev->class == PCI_CLASS_NOT_DEFINED) { + dev_info(&dev->dev, "Setting PCI class for 816x PCIe device\n"); + dev->class = PCI_CLASS_MULTIMEDIA_VIDEO; + } +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_TI, 0xb800, fixup_ti816x_class); + static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f, struct pci_fixup *end) { -- 1.7.9.6
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