lkml.org 
[lkml]   [2015]   [Oct]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3.13.y-ckt 66/85] PCI: Fix TI816X class code quirk
Date
3.13.11-ckt28 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bjorn Helgaas <bhelgaas@google.com>

commit d1541dc977d376406f4584d8eb055488655c98ec upstream.

In fixup_ti816x_class(), we assigned "class = PCI_CLASS_MULTIMEDIA_VIDEO".
But PCI_CLASS_MULTIMEDIA_VIDEO is only the two-byte base class/sub-class
and needs to be shifted to make space for the low-order interface byte.

Shift PCI_CLASS_MULTIMEDIA_VIDEO to set the correct class code.

Fixes: 63c4408074cb ("PCI: Add quirk for setting valid class for TI816X Endpoint")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Hemant Pedanekar <hemantp@ti.com>

Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
drivers/pci/quirks.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 8dcee88..7e6cdb2d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2832,12 +2832,15 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x3c28, vtd_mask_spec_errors);

static void fixup_ti816x_class(struct pci_dev *dev)
{
+ u32 class = dev->class;
+
/* TI 816x devices do not have class code set when in PCIe boot mode */
- dev_info(&dev->dev, "Setting PCI class for 816x PCIe device\n");
- dev->class = PCI_CLASS_MULTIMEDIA_VIDEO;
+ dev->class = PCI_CLASS_MULTIMEDIA_VIDEO << 8;
+ dev_info(&dev->dev, "PCI class overridden (%#08x -> %#08x)\n",
+ class, dev->class);
}
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_TI, 0xb800,
- PCI_CLASS_NOT_DEFINED, 0, fixup_ti816x_class);
+ PCI_CLASS_NOT_DEFINED, 0, fixup_ti816x_class);

/* Some PCIe devices do not work reliably with the claimed maximum
* payload size supported.
--
1.9.1


\
 
 \ /
  Last update: 2015-10-21 00:01    [W:0.311 / U:0.704 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site