linux-kernel - Re: [PATCH v2] tg3: driver sleeps indefinitely when EEH errors exceed eeh_max

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Message-Id: <20200618.203547.1927187219633676867.davem@davemloft.net>
Date:   Thu, 18 Jun 2020 20:35:47 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     drc@...ux.vnet.ibm.com
Cc:     netdev@...r.kernel.org, siva.kallam@...adcom.com,
        prashant@...adcom.com, mchan@...adcom.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] tg3: driver sleeps indefinitely when EEH errors
 exceed eeh_max_freezes

From: David Christensen <drc@...ux.vnet.ibm.com>
Date: Wed, 17 Jun 2020 11:51:17 -0700

> The driver function tg3_io_error_detected() calls napi_disable twice,
> without an intervening napi_enable, when the number of EEH errors exceeds
> eeh_max_freezes, resulting in an indefinite sleep while holding rtnl_lock.
> 
> Add check for pcierr_recovery which skips code already executed for the
> "Frozen" state.
> 
> Signed-off-by: David Christensen <drc@...ux.vnet.ibm.com>

Applied and queued up for -stable, thanks.