[PATCH v3 0/6] PowerNV PCIe Hotplug Driver Fixes
Ganesh G R
ganeshgr at linux.ibm.com
Wed Jul 23 21:47:25 AEST 2025
On 7/16/25 3:01 AM, Timothy Pearson wrote:
> Hello all,
>
> This series includes several fixes for bugs in the PowerNV PCIe hotplug
> driver that were discovered in testing with a Microsemi Switchtec PM8533
> PFX 48xG3 PCIe switch on a PowerNV system, as well as one workaround for
> PCIe switches that don't correctly implement slot presence detection
> such as the aforementioned one. Without the workaround, the switch works
> and downstream devices can be hot-unplugged, but the devices never come
> back online after being plugged in again until the system is rebooted.
> Other hotplug drivers (like pciehp_hpc) use a similar workaround.
>
> Also included are fixes for the EEH driver to make it hotplug safe,
> and a small patch to enable all three attention indicator states per
> the PCIe specification.
>
> Thanks,
>
> Shawn Anastasio (2):
> PCI: pnv_php: Properly clean up allocated IRQs on unplug
> PCI: pnv_php: Work around switches with broken presence detection
>
> Timothy Pearson (4):
> powerpc/eeh: Export eeh_unfreeze_pe()
> powerpc/eeh: Make EEH driver device hotplug safe
> PCI: pnv_php: Fix surprise plug detection and recovery
> PCI: pnv_php: Enable third attention indicator state
>
> arch/powerpc/kernel/eeh.c | 1 +
> arch/powerpc/kernel/eeh_driver.c | 48 ++++--
> arch/powerpc/kernel/eeh_pe.c | 10 +-
> arch/powerpc/kernel/pci-hotplug.c | 3 +
> drivers/pci/hotplug/pnv_php.c | 244 +++++++++++++++++++++++++++---
> 5 files changed, 263 insertions(+), 43 deletions(-)
>
Tested the patch series for EEH and hotplug on powernv, recovery is
working as expected, EEH changes looks good to me.
Tested-by: Ganesh Goudar <ganeshgr at linux.ibm.com>
Thanks
Ganesh
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