Messages in this thread | | | Date | Thu, 13 Apr 2017 12:40:23 -0400 (EDT) | Subject | Re: [PATCH net-next] net: stmmac: set total length of the packet to be transmitted in TDES3 | From | David Miller <> |
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From: Niklas Cassel <niklas.cassel@axis.com> Date: Mon, 10 Apr 2017 20:33:29 +0200
> From: Niklas Cassel <niklas.cassel@axis.com> > > Field FL/TPL in register TDES3 is not correctly set on GMAC4. > TX appears to be functional on GMAC 4.10a even if this field is not set, > however, to avoid relying on undefined behavior, set the length in TDES3. > > The field has a different meaning depending on if the TSE bit in TDES3 > is set or not (TSO). However, regardless of the TSE bit, the field is > not optional. The field is already set correctly when the TSE bit is set. > > Since there is no limit for the number of descriptors that can be > used for a single packet, the field should be set to the sum of > the buffers contained in: > [<desc with First Descriptor bit set> ... <desc n> ... > <desc with Last Descriptor bit set>], which should be equal to skb->len. > > Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Applied, thanks.
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