Re: [PATCH v2 2/3] PCI: tegra194: Avoid full Endpoint reinit on PERST#

[sashiko-bot@kernel.org]

> Tegra194 and Tegra234 lose controller register state across PERST#, but
> the driver remains bound. The common DWC initialization path now
> restores those registers while preserving its software resources. Tegra
> therefore no longer needs to call dw_pcie_ep_cleanup() on each PERST#
> cycle.
> 
> Remove the per-reset dw_pcie_ep_cleanup() call. The existing
> dw_pcie_ep_init_registers() entry point now restores reset-lost
> registers after the first initialization while retaining software
> resources until final driver teardown. The allocation guards already
> reuse the bitmaps, address array and per-function descriptors; this
> change also avoids repeating the full debugfs/eDMA teardown and setup.
> 
> Keep the EPF deinit notification in the PERST# deassert path after
> REFCLK is available and core reset has been deasserted, because EPF
> deinit callbacks can clear BARs and need register access. The final
> dw_pcie_ep_deinit() during driver removal still performs full cleanup.
> 
> Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>

Sashiko has reviewed this patch and found no issues.

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Sashiko AI review · https://sashiko.dev/#/patchset/20261021061903.1269605-1-mmaddireddy@nvidia.com?part=2