Hi
I am trying to enable the pci device in the driver by calling the
function, pci_enable_device and i get the below error.
fpga_pci_uio_driver 0000:4e:00.0: can't enable device: BAR 0 [mem
0x00000000-0x000fffff 64bit pref] not claimed
fpga_pci_uio_driver 0000:4e:00.0: Failed to enable fpga_pci_uio device
rc=-22
fpga_pci_uio_driver: probe of 0000:4e:00.0 failed with error -22
I am guessing its coming from pci_enable_resource function in
pci_setup.c. ( trying to setup debug env to trace exact location)
if (!r->parent) {
dev_err(&dev->dev, "can't enable device: BAR %d
%pR not claimed\n",
i, r);
return -EINVAL;
}
I am not sure why this condition is false. I am running kernel 3.19 and
this is a pcie endpoint device sitting on one of the port of the pcie
switch. Below is the dmesg output for the pcie switch port.
[ 13.586987] pci 0000:4b:04.0: PCI bridge to [bus 4e]
[ 13.591069] pci 0000:4b:04.0: bridge window [mem 0xc7c00000-0xc7ffffff
64bit pref]
lspci output for my device
lspci -v -s 4e:00.0
4e:00.0 Non-VGA unclassified device: Company Device 0180
(rev 01)
Flags: fast devsel
Memory at <unassigned> (64-bit, prefetchable) [size=1M]
Capabilities: [50] MSI: Enable- Count=1/32 Maskable- 64bit+
Capabilities: [78] Power Management version 3
Capabilities: [80] Express Endpoint, MSI 00
Capabilities: [100] Multi-Function Virtual Channel <?>
The other device on different port of the switch work fine. That device
driver also calls pci_enable_device(dev).
I found a thread http://www.spinics.net/lists/linux-pci/msg49725.html
discussing something similar. Should i apply any patch to solve it? or
am i missing something?
Thanks
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