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Julian Wiedmann dc5367bcc5 net/af_iucv: don't use paged skbs for TX on HiperSockets 
With commit e53743994e
("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 <jwi@linux.vnet.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org> # v4.8+
Fixes: e53743994e ("af_iucv: use paged SKBs for big outbound messages")
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2017-01-10 21:08:29 -05:00
..
Kconfig iucv: kernel option for z/VM IUCV and HiperSockets 2011-08-13 01:10:16 -07:00
Makefile
…
af_iucv.c net/af_iucv: don't use paged skbs for TX on HiperSockets 2017-01-10 21:08:29 -05:00
iucv.c net/iucv: Use explicit clean up labels in iucv_init() 2016-11-28 17:29:04 +01:00