From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH v2] net/fec_mpc52xx: Fix kernel panic on FEC error Date: Wed, 14 Oct 2009 15:10:25 -0700 (PDT) Message-ID: <20091014.151025.83161886.davem@davemloft.net> References: <20091014174224.29221.18830.stgit@angua> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: bones@secretlab.ca, netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org To: grant.likely@secretlab.ca Return-path: In-Reply-To: <20091014174224.29221.18830.stgit@angua> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linuxppc-dev-bounces+glppd-linuxppc64-dev=m.gmane.org@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+glppd-linuxppc64-dev=m.gmane.org@lists.ozlabs.org List-Id: netdev.vger.kernel.org From: Grant Likely Date: Wed, 14 Oct 2009 11:43:43 -0600 > From: John Bonesio > > The MDIO bus cannot be accessed at interrupt context, but on an FEC > error, the fec_mpc52xx driver reset function also tries to reset the > PHY. Since the error is detected at IRQ context, and the PHY functions > try to sleep, the kernel ends up panicking. > > Resetting the PHY on an FEC error isn't even necessary. This patch > solves the problem by removing the PHY reset entirely. > > Signed-off-by: John Bonesio > Signed-off-by: Grant Likely Applied, thanks.