[PATCH 0/4] PCI: Enable LTR/OBFF before device is used by driver

[Xudong Hao]

The series of patches enable LTR and OBFF before device is used by driver, and
introduce a couple of functions to save/restore LTR latency value.

Patch 1/4 introduce new function pci_obff_supported() as pci_ltr_support().

Patch 2/4 enable LTR(Latency tolerance reporting) before device is used by
driver.

Patch 3/4 enable OBFF(optimized buffer flush/fill) before device is used by
driver.

Patch 4/4 introduce a couple of functions pci_save_ltr_value() and
pci_restore_ltr_value() to save and restore LTR latency value, while device is
reset.
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