From mboxrd@z Thu Jan 1 00:00:00 1970 From: Becky Bruce Subject: Re: [PATCH] net/fec_mpc52xx: fix BUG on missing dma_ops Date: Mon, 30 Mar 2009 17:30:01 -0500 Message-ID: <48A51477-AF94-4E65-A224-A3D5125D22E4@kernel.crashing.org> References: <20090330184423.31699.61150.stgit@localhost.localdomain> Mime-Version: 1.0 (Apple Message framework v930.3) Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linuxppc-dev@ozlabs.org, David Miller To: Grant Likely Return-path: Received: from gate.crashing.org ([63.228.1.57]:44541 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753175AbZC3WaO (ORCPT ); Mon, 30 Mar 2009 18:30:14 -0400 In-Reply-To: <20090330184423.31699.61150.stgit@localhost.localdomain> Sender: netdev-owner@vger.kernel.org List-ID: On Mar 30, 2009, at 1:53 PM, Grant Likely wrote: > From: Grant Likely > > The driver triggers a BUG_ON() when allocating DMA buffers if the > arch/powerpc dma_ops from the of_platform device are not copied > into net_device structure. > > Signed-off-by: Grant Likely > --- > David, do you want to pick this one up right away, or should I merge > it > through Ben's powerpc tree? Grant, I really think you need to do what Kumar did for gianfar (http://patchwork.ozlabs.org/patch/24562/ ) - your patch just fixes the dma_ops problem, not the problem with getting to the correct archdata, which contains an offset (dma_data) that is used to form a bus address used in the various dma operations. Grep for get_dma_direct_offset in arch/powerpc and you'll see it used in the various dma operations. Cheers, B > > > g. > > drivers/net/fec_mpc52xx.c | 3 +++ > 1 files changed, 3 insertions(+), 0 deletions(-) > > > diff --git a/drivers/net/fec_mpc52xx.c b/drivers/net/fec_mpc52xx.c > index 049b0a7..215207d 100644 > --- a/drivers/net/fec_mpc52xx.c > +++ b/drivers/net/fec_mpc52xx.c > @@ -928,6 +928,9 @@ mpc52xx_fec_probe(struct of_device *op, const > struct of_device_id *match) > if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), > DRIVER_NAME)) > return -EBUSY; > > + /* Copy the PowerPC dma_ops from the of_device */ > + set_dma_ops(&ndev->dev, get_dma_ops(&op->dev)); > + > /* Init ether ndev with what we have */ > ndev->open = mpc52xx_fec_open; > ndev->stop = mpc52xx_fec_close; > > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-dev