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| author | Hans Zhang <18255117159@163.com> | 2026-05-18 08:42:40 +0800 |
|---|---|---|
| committer | Manivannan Sadhasivam <mani@kernel.org> | 2026-06-09 20:52:09 +0530 |
| commit | 29fbf582e75015c031e7965fdd4084af123b9ca2 (patch) | |
| tree | 9a26dcba917d11d473938717ba380ca06ab42148 /include/linux/stackprotector.h | |
| parent | 254f49634ee16a731174d2ae34bc50bd5f45e731 (diff) | |
PCI: Add pci_host_common_link_train_delay() helper
PCIe r6.0, sec 6.6.1 (Conventional Reset) requires that for a Downstream
Port supporting Link speeds greater than 5.0 GT/s, software must wait a
minimum of 100 ms after Link training completes before sending any
Configuration Request.
Introduce a static inline helper pci_host_common_link_train_delay() that
checks the given max_link_speed (2 = 5.0 GT/s, 3 = 8.0 GT/s, etc.) and
calls msleep(100) only when the speed is greater than 5.0 GT/s.
This allows multiple host controller drivers to share the same mandatory
delay without duplicating the logic.
Signed-off-by: Hans Zhang <18255117159@163.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20260518004246.1384532-2-18255117159@163.com
Diffstat (limited to 'include/linux/stackprotector.h')
0 files changed, 0 insertions, 0 deletions