netdev - Re: [PATCH net] dpaa2-switch: fix size of the dma

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Date: Wed, 6 Dec 2023 14:39:32 +0200
From: Ioana Ciornei <ioana.ciornei@....com>
To: Paolo Abeni <pabeni@...hat.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, 
	netdev@...r.kernel.org
Subject: Re: [PATCH net] dpaa2-switch: fix size of the dma_unmap

On Wed, Dec 06, 2023 at 12:04:17PM +0100, Paolo Abeni wrote:
> Hi,
> On Mon, 2023-12-04 at 16:21 +0200, Ioana Ciornei wrote:
> > The size of the DMA unmap was wrongly put as a sizeof of a pointer.
> > Change the value of the DMA unmap to be the actual macro used for the
> > allocation and the DMA map.
> > 
> > Fixes: 1110318d83e8 ("dpaa2-switch: add tc flower hardware offload on ingress traffic")
> > Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
> > ---
> >  drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
> > index 4798fb7fe35d..609dfde0a64a 100644
> > --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
> > +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch-flower.c
> > @@ -139,7 +139,8 @@ int dpaa2_switch_acl_entry_add(struct dpaa2_switch_filter_block *filter_block,
> >  	err = dpsw_acl_add_entry(ethsw->mc_io, 0, ethsw->dpsw_handle,
> >  				 filter_block->acl_id, acl_entry_cfg);
> >  
> > -	dma_unmap_single(dev, acl_entry_cfg->key_iova, sizeof(cmd_buff),
> > +	dma_unmap_single(dev, acl_entry_cfg->key_iova,
> > +			 DPAA2_ETHSW_PORT_ACL_CMD_BUF_SIZE,
> >  			 DMA_TO_DEVICE);
> 
> I see a similar unmap in dpaa2_switch_acl_entry_remove() that looks
> like being affect by the same issue. Why a similar change is not needed
> there?
> 

My bad, it's needed there also.

Thanks!
Ioana