PCI: Add sysfs max_link_speed/width, current_link_speed/width, etc

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Expose PCIe bridges attributes such as secondary bus number, subordinate
bus number, max link speed and link width, current link speed and link
width via sysfs in /sys/bus/pci/devices/...

This information is available via lspci, but that requires root privilege.

Signed-off-by: Wong Vee Khee <vee.khee.wong@ni.com>
Signed-off-by: Hui Chun Ong <hui.chun.ong@ni.com>
[bhelgaas: changelog, return errors early to unindent usual case, return
errors with same style throughout]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

...

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Wong Vee Khee 2017-06-01 17:43:06 +08:00 • committed by Bjorn Helgaas

parent 99b3c58f7b

commit 56c1af4606

2 changed files with 196 additions and 4 deletions

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199

drivers/pci/pci-sysfs.c

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1

include/uapi/linux/pci_regs.h

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