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
-
To unsubscribe from this list: send the line "unsubscribe linux-net" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
This archive was generated by hypermail 2b29 : Fri Nov 15 2002 - 22:00:01 EST