net: mhi: Add support for non-linear MBIM skb processing

Browse source

Currently, if skb is non-linear, due to MHI skb chaining, it is
linearized in MBIM RX handler prior MBIM decoding, causing extra
allocation and copy that can be as large as the maximum MBIM frame
size (32K).

This change introduces MBIM decoding for non-linear skb, allowing to
process 'large' non-linear MBIM packets without skb linearization.
The IP packets are simply extracted from the MBIM frame using the
skb_copy_bits helper.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Loic Poulain 2021-03-29 17:39:31 +02:00 • committed by David S. Miller

parent 24ad92c841

commit d9f0713c92

1 changed files with 25 additions and 26 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

51

drivers/net/mhi/proto_mbim.c

View file