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Message-ID: <20230911180113.GA113013@kernel.org>
Date: Mon, 11 Sep 2023 20:01:13 +0200
From: Simon Horman <horms@...nel.org>
To: Shinas Rasheed <srasheed@...vell.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, hgani@...vell.com,
vimleshk@...vell.com, mschmidt@...hat.com, egallen@...hat.com,
Veerasenareddy Burru <vburru@...vell.com>,
Sathesh Edara <sedara@...vell.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Satananda Burla <sburla@...vell.com>,
Abhijit Ayarekar <aayarekar@...vell.com>
Subject: Re: [net PATCH] octeon_ep: fix tx dma unmap len values in SG
On Mon, Sep 11, 2023 at 02:23:06AM -0700, Shinas Rasheed wrote:
> Lengths of SG pointers are in big-endian
>
> Fixes: 37d79d059606 ("octeon_ep: add Tx/Rx processing and interrupt support")
> Signed-off-by: Shinas Rasheed <srasheed@...vell.com>
> ---
> drivers/net/ethernet/marvell/octeon_ep/octep_tx.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c
> index 5a520d37bea0..7e99486c274b 100644
> --- a/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c
> +++ b/drivers/net/ethernet/marvell/octeon_ep/octep_tx.c
> @@ -69,12 +69,12 @@ int octep_iq_process_completions(struct octep_iq *iq, u16 budget)
> compl_sg++;
>
> dma_unmap_single(iq->dev, tx_buffer->sglist[0].dma_ptr[0],
> - tx_buffer->sglist[0].len[0], DMA_TO_DEVICE);
> + tx_buffer->sglist[0].len[3], DMA_TO_DEVICE);
>
> i = 1; /* entry 0 is main skb, unmapped above */
> while (frags--) {
> dma_unmap_page(iq->dev, tx_buffer->sglist[i >> 2].dma_ptr[i & 3],
> - tx_buffer->sglist[i >> 2].len[i & 3], DMA_TO_DEVICE);
> + tx_buffer->sglist[i >> 2].len[3 - (i & 3)], DMA_TO_DEVICE);
> i++;
> }
Hi Shinas,
is this change also needed in octep_iq_process_completions() ?
The code there looks rather similar.
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