Hi,
This patch series is a follow-up to a side discussion that started from
Niklas' comment at:
https://lore.kernel.org/all/aXtrW7viGZfMNZur@ryzen/
This series:
1) Makes BAR Match vs Address Match teardown in DesignWare EP explicit
by returning right after clearing a BAR-match inbound mapping.
2) Fixes the dw_pcie_ep_set_bar() mapping-update path to run
dw_pcie_ep_clear_ib_maps() unconditionally, since the driver cannot
reliably distinguish BAR Match -> BAR Match from Address Match ->
BAR Match transitions when the same epf_bar instance is updated in
place and passed in again.
Base: controller/dwc branch, latest:
commit a24149881558 ("PCI: dwc: ep: Add comment explaining controller level
PTM access in multi PF setup")
Changes since v1:
- Switched from the v1 approach (Y) to the alternative approach (X)
that was proposed earlier in the discussion.
Details of the v1 (Y) vs v2 (X) are described at:
https://lore.kernel.org/all/sextbnbmsur2xjfoun2l4lr5vekmpzae7sx6or2ird44t6ud6d@yprcz43tpq4p/
- Changed the subject.
v1: https://lore.kernel.org/all/20260131133655.218018-1-den@valinux.co.jp/
Thanks,
Koichiro Den (2):
PCI: dwc: ep: Return after clearing BAR-match inbound mapping
PCI: dwc: ep: Always clear IB maps on BAR update
drivers/pci/controller/dwc/pcie-designware-ep.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
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2.51.0