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| author | Lukas Wunner <lukas@wunner.de> | 2026-05-03 15:34:46 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2026-05-18 17:27:42 -0500 |
| commit | 10baa9b4df4005ca53c59c30c2d4b774469e10b6 (patch) | |
| tree | 03120be75fe672c4c396528a36c14c31d6556cbc /tools/perf/scripts/python | |
| parent | 41167a1e98536b4baf0846fd259c8124bd1c4e1b (diff) | |
PCI: Drop unnecessary retries when restoring BARs
In 2012, commit 26f41062f28d ("PCI: check for pci bar restore completion
and retry") amended pci_restore_state() to attempt BAR restoration up to 10
times. This was necessary because back in the day, only a 100 msec delay
was observed after pcie_flr() carried out a Function Level Reset. The
retries ensured that BARs were restored even if devices needed more time to
come out of reset.
In 2016, commit 5adecf817dd6 ("PCI: Wait for up to 1000ms after FLR reset")
extended the delay to 1 sec. Commit a2758b6b8fdb ("PCI: Rename
pci_flr_wait() to pci_dev_wait() and make it generic") subsequently
extended it further to 60 sec.
The lengthened delay makes it unnecessary to retry BAR restoration, so
drop it.
Reported-by: Bjorn Helgaas <bhelgaas@google.com>
Closes: https://lore.kernel.org/r/20260416225745.GA41850@bhelgaas/
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/785c98b50a7a00d0698848c75d51b8f5669ad18f.1777814679.git.lukas@wunner.de
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions