netdev - Re: [PATCH net] qeth: don't query for info if hardware not ready.

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Date:	Tue, 02 Sep 2014 13:54:53 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	blaschka@...ux.vnet.ibm.com
Cc:	netdev@...r.kernel.org, linux-s390@...r.kernel.org
Subject: Re: [PATCH net] qeth: don't query for info if hardware not ready.

From: Frank Blaschka <blaschka@...ux.vnet.ibm.com>
Date: Tue, 2 Sep 2014 08:20:17 +0200

> From: Eugene Crosser <Eugene.Crosser@...ibm.com>
> 
> When qeth device is queried for ethtool data, hardware operation
> is performed to extract the necessary information from the card.
> If the card is not online at the moment (e.g. it is undergoing
> recovery), this operation produces undesired effects like
> temporarily freezing the system. This patch prevents execution
> of the hardware query operation when the card is not online.
> In such case, ioctl() operation returns error with errno ENODEV.
> 
> Reviewed-by: Ursula Braun <ursula.braun@...ibm.com>
> Signed-off-by: Eugene Crosser <Eugene.Crosser@...ibm.com>
> Signed-off-by: Frank Blaschka <blaschka@...ux.vnet.ibm.com>

Applied.
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