Re: [PATCH 2/8] farsync: Fix confusion about DMA address and bufferoffset types
From: Ben Hutchings
Date: Mon Oct 28 2013 - 00:51:50 EST
On Mon, 2013-10-28 at 00:26 -0400, David Miller wrote:
> From: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
> Date: Sun, 27 Oct 2013 21:51:44 +0000
> > - dbg(DBG_TX, "In fst_tx_dma %p %p %d\n", skb, mem, len);
> > + dbg(DBG_TX, "In fst_tx_dma %x %x %d\n", (u32)skb, mem, len);
> Please use %p for the skb pointer instead of casting it (which btw
> will introduce a warning on 64-bit).
skb is the DMA address of the data in the sk_buff. Yes, this is really
[W]e found...that it wasn't as easy to get programs right as we had thought.
... I realized that a large part of my life from then on was going to be spent
in finding mistakes in my own programs. - Maurice Wilkes, 1949
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