linux-toradex.git/net/iucv, branch v5.8

net/af_iucv: clean up function prototypes

2020-05-19T19:50:14+00:00

Remove a bunch of forward declarations (trivially shifting code around
where needed), and make a few functions static.

Signed-off-by: Julian Wiedmann 
Signed-off-by: David S. Miller

net/af_iucv: remove a redundant zero initialization

2020-05-19T19:50:14+00:00

txmsg is declared as {0}, no need to clear individual fields later on.

Signed-off-by: Julian Wiedmann 
Signed-off-by: David S. Miller

net/af_iucv: replace open-coded U16_MAX

2020-05-19T19:50:14+00:00

Improve the readability of a range check.

Signed-off-by: Julian Wiedmann 
Signed-off-by: David S. Miller

net/af_iucv: remove pm support

2020-05-19T19:50:14+00:00

commit 394216275c7d ("s390: remove broken hibernate / power management support")
removed support for ARCH_HIBERNATION_POSSIBLE from s390.

So drop the unused pm ops from the s390-only af_iucv socket code.

Signed-off-by: Julian Wiedmann 
Signed-off-by: David S. Miller

net/iucv: remove pm support

2020-05-19T19:50:14+00:00

commit 394216275c7d ("s390: remove broken hibernate / power management support")
removed support for ARCH_HIBERNATION_POSSIBLE from s390.

So drop the unused pm ops from the s390-only iucv bus driver.

CC: Hendrik Brueckner 
Signed-off-by: Julian Wiedmann 
Signed-off-by: David S. Miller

treewide: Use sizeof_field() macro

2019-12-09T18:36:44+00:00

Replace all the occurrences of FIELD_SIZEOF() with sizeof_field() except
at places where these are defined. Later patches will remove the unused
definition of FIELD_SIZEOF().

This patch is generated using following script:

EXCLUDE_FILES="include/linux/stddef.h|include/linux/kernel.h"

git grep -l -e "\bFIELD_SIZEOF\b" | while read file;
do

	if [[ "$file" =~ $EXCLUDE_FILES ]]; then
		continue
	fi
	sed -i  -e 's/\bFIELD_SIZEOF\b/sizeof_field/g' $file;
done

Signed-off-by: Pankaj Bharadiya 
Link: https://lore.kernel.org/r/20190924105839.110713-3-pankaj.laxminarayan.bharadiya@intel.com
Co-developed-by: Kees Cook 
Signed-off-by: Kees Cook 
Acked-by: David Miller  # for net

net/af_iucv: mark expected switch fall-throughs

2019-07-29T17:26:14+00:00

Mark switch cases where we are expecting to fall through.

This patch fixes the following warnings:

net/iucv/af_iucv.c: warning: this statement may fall
through [-Wimplicit-fallthrough=]:  => 537:3, 519:6, 2246:6, 510:6

Notice that, in this particular case, the code comment is
modified in accordance with what GCC is expecting to find.

Reported-by: Geert Uytterhoeven 
Signed-off-by: Gustavo A. R. Silva 
Reviewed-by: Kees Cook 
Signed-off-by: David S. Miller

net/af_iucv: always register net_device notifier

2019-06-19T20:26:33+00:00

Even when running as VM guest (ie pr_iucv != NULL), af_iucv can still
open HiperTransport-based connections. For robust operation these
connections require the af_iucv_netdev_notifier, so register it
unconditionally.

Also handle any error that register_netdevice_notifier() returns.

Fixes: 9fbd87d41392 ("af_iucv: handle netdev events")
Signed-off-by: Julian Wiedmann 
Reviewed-by: Ursula Braun 
Signed-off-by: David S. Miller

net/af_iucv: build proper skbs for HiperTransport

2019-06-19T20:26:33+00:00

The HiperSockets-based transport path in af_iucv is still too closely
entangled with qeth.
With commit a647a02512ca ("s390/qeth: speed-up L3 IQD xmit"), the
relevant xmit code in qeth has begun to use skb_cow_head(). So to avoid
unnecessary skb head expansions, af_iucv must learn to
1) respect dev->needed_headroom when allocating skbs, and
2) drop the header reference before cloning the skb.

While at it, also stop hard-coding the LL-header creation stage and just
use the appropriate helper.

Fixes: a647a02512ca ("s390/qeth: speed-up L3 IQD xmit")
Signed-off-by: Julian Wiedmann 
Signed-off-by: David S. Miller

net/af_iucv: remove GFP_DMA restriction for HiperTransport

2019-06-19T20:26:33+00:00

af_iucv sockets over z/VM IUCV require that their skbs are allocated
in DMA memory. This restriction doesn't apply to connections over
HiperSockets. So only set this limit for z/VM IUCV sockets, thereby
increasing the likelihood that the large (and linear!) allocations for
HiperTransport messages succeed.

Fixes: 3881ac441f64 ("af_iucv: add HiperSockets transport")
Signed-off-by: Julian Wiedmann 
Reviewed-by: Ursula Braun 
Reviewed-by: Hendrik Brueckner 
Signed-off-by: David S. Miller