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authorBjorn Helgaas <bhelgaas@google.com>2018-03-30 22:41:49 +0300
committerBjorn Helgaas <bhelgaas@google.com>2018-05-26 01:29:49 +0300
commite5b1db0186bfb3bede41e412b27c9bcf2b336622 (patch)
treea8108847dd2b5f06782536e6dd8fc2c9715d3a1b /drivers/pci/probe.c
parent4695ca9d17a2f47e0be3011ef25a4d77b973b547 (diff)
downloadlinux-e5b1db0186bfb3bede41e412b27c9bcf2b336622.tar.xz
PCI: Remove unused pcie_get_minimum_link()
In some cases pcie_get_minimum_link() returned misleading information because it found the slowest link and the narrowest link without considering the total bandwidth of the link. For example, consider a path with these two links: - 16.0 GT/s x1 link (16.0 * 10^9 * 128 / 130) * 1 / 8 = 1969 MB/s - 2.5 GT/s x16 link ( 2.5 * 10^9 * 8 / 10) * 16 / 8 = 4000 MB/s The available bandwidth of the path is limited by the 16 GT/s link to about 1969 MB/s, but pcie_get_minimum_link() returned 2.5 GT/s x1, which corresponds to only 250 MB/s. Callers should use pcie_print_link_status() instead, or pcie_bandwidth_available() if they need more detailed information. Remove pcie_get_minimum_link() since there are no callers left. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/probe.c')
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