[dpdk-dev] [dpdk-stable] [PATCH v1] net/tap: fix CRC stripping capability report
Thomas Monjalon
thomas at monjalon.net
Mon Feb 12 18:55:22 CET 2018
The title should be "add CRC stripping capability".
12/02/2018 15:43, Ophir Munk:
> CRC stripping is executed outside of TAP PMD scope. There is no
> prevention that TAP reports on Rx CRC stripping capability.
We could mention that the CRC stripping is done in the kernel.
> It is especially required when TAP is operating as failsafe sub-device
> with another PCI sub-device which supports CRC stripping.
> In the corrupted code TAP did not report on this capability which
> caused failsafe to not report on it as well.
You discover the bug with failsafe but it is not related at all.
I think you squeeze this part of the explanation.
> The fix is for TAP to report that Rx CRC stripping is supported.
>
> Fixes: 95ae196ae10b ("net/tap: use new Rx offloads API")
I don't think it is a root cause.
This capability is missing from day one:
Fixes: 02f96a0a82d1 ("net/tap: add TUN/TAP device PMD")
> Cc: stable at dpdk.org
>
> Signed-off-by: Ophir Munk <ophirmu at mellanox.com>
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