commit dc5367bcc556e97555fc94a32cd1aadbebdff47e upstream.
With commit e5374399
("af_iucv: use paged SKBs for big outbound messages"),
we transmit paged skbs for both of AF_IUCV's transport modes
(IUCV or HiperSockets).
The qeth driver for Layer 3 HiperSockets currently doesn't
support NETIF_F_SG, so these skbs would just be linearized again
by the stack.
Avoid that overhead by using paged skbs only for IUCV transport.
cc stable, since this also circumvents a significant skb leak when
sending large messages (where the skb then needs to be linearized).
Signed-off-by: Julian Wiedmann <firstname.lastname@example.org>
Signed-off-by: Ursula Braun <email@example.com>
Fixes: e5374399 ("af_iucv: use paged SKBs for big outbound messages")
Signed-off-by: David S. Miller <firstname.lastname@example.org>
Signed-off-by: Greg Kroah-Hartman <email@example.com>