linux-kernel - Re: [PATCH v2] PCI: merge slot and bus reset implementations

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Date:   Sun, 11 Apr 2021 12:31:58 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Raphael Norwitz <raphael.norwitz@...anix.com>
Cc:     "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "ameynarkhede03@...il.com" <ameynarkhede03@...il.com>
Subject: Re: [PATCH v2] PCI: merge slot and bus reset implementations

On Thu, Apr 08, 2021 at 06:23:40PM +0000, Raphael Norwitz wrote:
> Slot resets are bus resets with additional logic to prevent a device
> from being removed during the reset. Currently slot and bus resets have
> separate implementations in pci.c, complicating higher level logic. As
> discussed on the mailing list, they should be combined into a generic
> function which performs an SBR. This change adds a function,
> pci_reset_bus_function(), which first attempts a slot reset and then
> attempts a bus reset if -ENOTTY is returned, such that there is now a
> single device agnostic function to perform an SBR.
> 
> This new function is also needed to add SBR reset quirks and therefore
> is exposed in pci.h.
> 
> Link: https://lkml.org/lkml/2021/3/23/911
> 
> Suggested-by: Alex Williamson <alex.williamson@...hat.com>
> Signed-off-by: Amey Narkhede <ameynarkhede03@...il.com>
> Signed-off-by: Raphael Norwitz <raphael.norwitz@...anix.com>
> ---
>  drivers/pci/pci.c   | 19 +++++++++++--------
>  include/linux/pci.h |  1 +
>  2 files changed, 12 insertions(+), 8 deletions(-)
> 

Thanks,
Reviewed-by: Leon Romanovsky <leonro@...dia.com>