From: "David S. Miller" <davem@redhat.com>
To: carstenl@mips.com
Cc: jgarzik@pobox.com, ralf@linux-mips.org,
linux-mips@linux-mips.org, tsbogend@alpha.franken.de,
linux-net@vger.kernel.org, kevink@mips.com
Subject: Re: BUG in the PCNET32 ethernet driver
Date: Wed, 13 Nov 2002 20:11:55 -0800 (PST) [thread overview]
Message-ID: <20021113.201155.106013477.davem@redhat.com> (raw)
In-Reply-To: <3DD2B128.62DFB392@mips.com>
From: Carsten Langgaard <carstenl@mips.com>
Date: Wed, 13 Nov 2002 21:08:08 +0100
Jeff Garzik wrote:
> Why does this line not reference PKT_BUF_SZ when all the others do?
In this case we know the size of the packet and therefore only need to handle that.
In the other cases we don't know have big the receiving packet is going to be, so we has to
take care of the whole buffer.
When you unmap a DMA buffer, which is a resource so this is just like
freeing memory, you must specify the exact size you used when creating
the mapping to begin with.
Franks a lot,
David S. Miller
davem@redhat.com
next prev parent reply other threads:[~2002-11-14 4:13 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-13 13:34 BUG in the PCNET32 ethernet driver Carsten Langgaard
2002-11-13 16:42 ` Jeff Garzik
2002-11-13 20:08 ` Carsten Langgaard
2002-11-14 4:11 ` David S. Miller [this message]
2002-11-13 20:20 ` Jeff Garzik
2002-11-13 20:46 ` Carsten Langgaard
2002-12-11 12:37 ` Carsten Langgaard
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