From: David Miller <davem@davemloft.net>
To: andrianov@ispras.ru
Cc: mugunthanvnm@ti.com, a@unstable.cc, felipe.balbi@linux.intel.com,
fw@strlen.de, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, vaishali.thakkar@oracle.com,
ldv-project@linuxtesting.org
Subject: Re: [PATCH] smc91c92_cs : add a spinlock to avoid race condition
Date: Thu, 18 Aug 2016 21:07:34 -0700 (PDT) [thread overview]
Message-ID: <20160818.210734.1003452853595787957.davem@davemloft.net> (raw)
In-Reply-To: <1471354746-27110-1-git-send-email-andrianov@ispras.ru>
From: Pavel Andrianov <andrianov@ispras.ru>
Date: Tue, 16 Aug 2016 16:39:06 +0300
> smc_reset may be executed in parallel with timer function media_check.
> To avoid data race in smc_set_xcvr a spinlock was added.
>
> Found by Linux Driver Verification project (linuxtesting.org).
>
> Signed-off-by: Pavel Andrianov <andrianov@ispras.ru>
This is not sufficient.
You have to block basically the entire function, because both
smc_reset and media_check program the bank selection so could
corrupt eachother's register accesses.
next prev parent reply other threads:[~2016-08-19 4:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-16 13:39 [PATCH] smc91c92_cs : add a spinlock to avoid race condition Pavel Andrianov
2016-08-19 4:07 ` David Miller [this message]
2016-08-19 4:41 ` Vaishali Thakkar
2016-08-19 6:00 ` David Miller
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