Resending this in PLAIN TEXT.
Description:
The Kernel PCI driver that probes the devices always reports the config space as 256 bytes for the PCI devices that are not PCI-e or PCI-X.
There are some vendor devices that are not PCI-e or PCI-X, but might have the configuration space data that is more than 256 bytes in size to
be made accessible through the standard sys-fs "/sys/bus/pci/devices/./config" link.
Currently, the current Kernel does not provide the extended config space access for those devices, and a proprietary mechanism is
oftentimes used by the vendor utilities to address that. As the problem could be seen, use of proprietary tools and utilities automatically
leads to user confusion of using non-standard tools across different vendor devices.
Patch:
--- linux-4.4-rc8/drivers/pci/probe.c.orig 2016-01-07 13:30:54.310392700 -0800
+++ linux-4.4-rc8/drivers/pci/probe.c 2016-01-07 13:32:14.586392700 -0800
@@ -1119,28 +1119,8 @@ static int pci_cfg_space_size_ext(struct
int pci_cfg_space_size(struct pci_dev *dev)
{
- int pos;
- u32 status;
- u16 class;
-
- class = dev->class >> 8;
- if (class == PCI_CLASS_BRIDGE_HOST)
- return pci_cfg_space_size_ext(dev);
-
- if (!pci_is_pcie(dev)) {
- pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
- if (!pos)
- goto fail;
-
- pci_read_config_dword(dev, pos + PCI_X_STATUS, &status);
- if (!(status & (PCI_X_STATUS_266MHZ | PCI_X_STATUS_533MHZ)))
- goto fail;
- }
-
return pci_cfg_space_size_ext(dev);
- fail:
- return PCI_CFG_SPACE_SIZE;
}
#define LEGACY_IO_RESOURCE (IORESOURCE_IO | IORESOURCE_PCI_FIXED)
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Signed-off-by: Rajesh A Developer <rajesh.ananth@xxxxxxxxxx>
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