From: Michael Ellerman <patch-notifications@ellerman•id.au>
To: Gavin Shan <gwshan@linux•vnet.ibm.com>, linuxppc-dev@ozlabs•org
Cc: Gavin Shan <gwshan@linux•vnet.ibm.com>
Subject: Re: powerpc/powernv: Call opal_pci_poll() if needed
Date: Thu, 29 Sep 2016 23:13:14 +1000 (AEST) [thread overview]
Message-ID: <3slFPQ43Brz9sBg@ozlabs.org> (raw)
In-Reply-To: <1466750659-17400-1-git-send-email-gwshan@linux.vnet.ibm.com>
On Fri, 2016-24-06 at 06:44:19 UTC, Gavin Shan wrote:
> When issuing PHB reset, OPAL API opal_pci_poll() is called to drive
> the state machine in OPAL forward. However, we needn't always call
> the function under some circumstances like reset deassert.
>
> This avoids calling opal_pci_poll() when OPAL_SUCCESS is returned
> from opal_pci_reset(). Except the overhead introduced by additional
> one unnecessary OPAL call, I didn't run into real issue because of
> this.
>
> Reported-by: Pridhiviraj Paidipeddi <ppaiddipe@in•ibm.com>
> Signed-off-by: Gavin Shan <gwshan@linux•vnet.ibm.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/fbce44d0ed42e4653172376f4dfeaa
cheers
prev parent reply other threads:[~2016-09-29 13:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-24 6:44 [PATCH] powerpc/powernv: Call opal_pci_poll() if needed Gavin Shan
2016-09-29 13:13 ` Michael Ellerman [this message]
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