Re: [PATCH v3 0/6] mpt3sas: Hot-Plug Surprise removal support on IOC.

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On Mon, Sep 24, 2018 at 9:36 AM Suganath Prabu S
<suganath-prabu.subramani@xxxxxxxxxxxx> wrote:
>
> Posting below set of patches to support PCIe Hot Plug surprise removal,
> and few defect fixes.
>
> This is NOT the normal PCIe Hot Plug support, whereby the user informs the
> OS that a hot removal is desired, the OS does an orderly shutdown of the
> driver on the device, special hot plug circuitry removes power from the
> PCIe slot, then the user can remove the device and replace it
> (where orderly bring-up of the device is done).
>
> With a true surprise removal (just removing HBA from a slot)
> there is a possibility to get all kinds of PCIe transaction errors,
> Below patches addresses those issues and remove HBA without bringing
> the system down.
>
> For surprise removal detection, driver does a PCI
> read of IOC's vendor field in IOC's PCI configuration space.
> If the read value is 0xFFFFFFFF this indicates that the device
> might have hot removed and the device will be removed from driver.
>

AFAIR Lukas asked you to Cc new versions to Linux PCI mailing list
and, if I'm not mistaken, to him.

> V1 changes:
> In Patch 0001 - unlock mutex, if active reset is in progress.
>
> V2 changes:
> Replaced mpt3sas_base_pci_device_is_unplugged with
> pci_device_is_present.
>
> V3 Change Set:
> Simplified function "mpt3sas_base_pci_device_is_available" and
> made inline
>
> Suganath Prabu S (6):
>   mpt3sas: Introduce      mpt3sas_base_pci_device_is_available
>   mpt3sas: Separate out      mpt3sas_wait_for_ioc_to_operational
>   mpt3sas: Introdude  _scsih_get_shost_and_ioc.
>   mpt3sas: Fix Sync cache command failure during driver      unload.
>   mpt3sas: Fix driver modifying NVRAM/persistent data.
>   mpt3sas: Bump driver version to 27.100.00.00.
>
>  drivers/scsi/mpt3sas/mpt3sas_base.c      | 135 +++++++++++++++-------
>  drivers/scsi/mpt3sas/mpt3sas_base.h      |  11 +-
>  drivers/scsi/mpt3sas/mpt3sas_config.c    |  32 +-----
>  drivers/scsi/mpt3sas/mpt3sas_ctl.c       |  26 +----
>  drivers/scsi/mpt3sas/mpt3sas_scsih.c     | 189 +++++++++++++++++++++++++++----
>  drivers/scsi/mpt3sas/mpt3sas_transport.c |  82 +++-----------
>  6 files changed, 298 insertions(+), 177 deletions(-)
>
> --
> 1.8.3.1
>


-- 
With Best Regards,
Andy Shevchenko



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