From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: "Guilherme G. Piccoli" <gpiccoli@linux.vnet.ibm.com>,
linuxppc-dev@lists.ozlabs.org
Cc: paulus@samba.org, gpiccoli@linux.vnet.ibm.com
Subject: Re: [v3] powerpc/powernv: Add ppc_pci_reset_phbs parameter to issue a PHB reset
Date: Mon, 22 Jan 2018 14:34:10 +1100 (AEDT) [thread overview]
Message-ID: <3zPxqk6GsHz9sCZ@ozlabs.org> (raw)
In-Reply-To: <20171117185859.2756-1-gpiccoli@linux.vnet.ibm.com>
On Fri, 2017-11-17 at 18:58:59 UTC, "Guilherme G. Piccoli" wrote:
> During a kdump kernel boot in PowerPC, we request a reset of the PHBs
> to the FW. It makes sense, since if we are booting a kdump kernel it
> means we had some trouble before and we cannot rely in the adapters'
> health; they could be in a bad state, hence the reset is needed.
>
> But this reset is useful not only in kdump - there are situations,
> specially when debugging drivers, that we could break an adapter in
> a way it requires such reset. One can tell to just go ahead and
> reboot the machine, but happens that many times doing kexec is much
> faster, and so preferable than a full power cycle.
>
> This patch adds the ppc_pci_reset_phbs parameter to perform such reset.
>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/45baee1416a0086dccaa8a94c70e67
cheers
prev parent reply other threads:[~2018-01-22 3:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-17 18:58 [PATCH v3] powerpc/powernv: Add ppc_pci_reset_phbs parameter to issue a PHB reset Guilherme G. Piccoli
2018-01-22 3:34 ` Michael Ellerman [this message]
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