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Subject: Re: [PATCH 2/2] cxl: Workaround XSL bug that does not clear the RA
 bit after a reset
To: Ian Munsie <imunsie@au1.ibm.com>, Michael Ellerman <mpe@ellerman.id.au>,
 mikey <mikey@neuling.org>, linuxppc-dev@lists.ozlabs.org,
 Frederic Barrat <frederic.barrat@fr.ibm.com>,
 Huy Nguyen <huyn@mellanox.com>
References: <1467226286-28547-1-git-send-email-imunsie@au.ibm.com>
 <1467226286-28547-2-git-send-email-imunsie@au.ibm.com>
From: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Date: Thu, 30 Jun 2016 13:05:30 +0200
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Le 29/06/2016 20:51, Ian Munsie a écrit :
> From: Ian Munsie <imunsie@au1.ibm.com>
>
> An issue was noted in our debug logs where the XSL would leave the RA
> bit asserted after an AFU reset operation, which would effectively
> prevent further AFU reset operations from working.
>
> Workaround the issue by clearing the RA bit with an MMIO write if it is
> still asserted after any AFU control operation.
>
> Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>


OK, should be safe and valid even on non-xsl hardware.

Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>


   Fred