[RFC PATCH v3 0/3] PCI/ASPM: Remove struct aspm_latency

From: Saheed O. Bolarinwa
Date: Tue Sep 28 2021 - 20:41:26 EST

From: "Bolarinwa O. Saheed" <refactormyself@xxxxxxxxx>

To validate and set link latency capability, `struct aspm_latency` and
related members defined within `struct pcie_link_state` are used.
However, since there are not many access to theses values, it is
possible to directly access and compute these values.

Doing this will also reduce the dependency on `struct pcie_link_state`.

The series removes `struct aspm_latency` and related members within
`struct pcie_link_state`. All latencies are now calculated when needed.

- v2:
- directly access downstream by calling `pci_function_0()`
instead of using the `struct pcie_link_state`
- v3(this version):
- rebase on Linux 5.15-rc2

These series are based on
'commit e4e737bb5c17 ("Linux 5.15-rc2")'

Saheed O. Bolarinwa (3):
PCI/ASPM: Remove link latencies cached within struct pcie_link_state
PCI/ASPM: Remove struct pcie_link_state.acceptable
PCI/ASPM: Remove struct aspm_latency

drivers/pci/pcie/aspm.c | 89 ++++++++++++++++++-----------------------
1 file changed, 38 insertions(+), 51 deletions(-)