mISDN: Delete unnecessary checks before the macro call “dev_kfree_skb”

The dev_kfree_skb() function performs also input parameter validation.
Thus the test around the shown calls is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174

Based on 1 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation this program is
distributed in the hope that it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

mISDN: Fix null pointer dereference at mISDN_FsmNew

If mISDN_FsmNew() fails to allocate memory for jumpmatrix
then null pointer dereference will occur on any write to
jumpmatrix.

The patch adds check on successful allocation and
corresponding error handling.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

networking: introduce and use skb_put_data()

A common pattern with skb_put() is to just want to memcpy()
some data into the new space, introduce skb_put_data() for
this.

An spatch similar to the one for skb_put_zero() converts many
of the places using it:

@@
identifier p, p2;
expression len, skb, data;
type t, t2;
@@
(
-p = skb_put(skb, len);
+p = skb_put_data(skb, data, len);
|
-p = (t)skb_put(skb, len);
+p = skb_put_data(skb, data, len);
)
(
p2 = (t2)p;
-memcpy(p2, data, len);
|
-memcpy(p, data, len);
)

@@
type t, t2;
identifier p, p2;
expression skb, data;
@@
t *p;
...
(
-p = skb_put(skb, sizeof(t));
+p = skb_put_data(skb, data, sizeof(t));
|
-p = (t *)skb_put(skb, sizeof(t));
+p = skb_put_data(skb, data, sizeof(t));
)
(
p2 = (t2)p;
-memcpy(p2, data, sizeof(*p));
|
-memcpy(p, data, sizeof(*p));
)

@@
expression skb, len, data;
@@
-memcpy(skb_put(skb, len), data, len);
+skb_put_data(skb, data, len);

(again, manually post-processed to retain some comments)

Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

mISDN: fix OOM condition for sending queued I-Frames

The old code did not check the return value of skb_clone().
The extra skb_clone() is not needed at all, if using skb_realloc_headroom()
instead, which gives us a private copy with enough headroom as well.
We need to requeue the original skb if the call failed, because we cannot
inform upper layers about the data loss. Restructure the code to minimise
rollback effort if it happens.
This fix kernel bug #86091

Thanks to Insu Yun <wuninsu@gmail.com> to remind me on this issue.

Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

mISDN: Bugfix for layer2 fixed TEI mode

If a fixed TEI is used, the initial state of the layer 2 statmachine need to be
4 (TEI assigned). This was true only for Point to Point connections, but not
for the other fixed TEIs. It was not found before, because usually only the
TEI 0 is used as fixed TEI for PtP mode, but if you try X31 packet mode
connections with SAPI 16, TEI 1, it did fail.

Signed-off-by: Karsten Keil <keil@b1-systems.de>
Cc: <stable@vger.kernel.org> # 3.5.x
Signed-off-by: David S. Miller <davem@davemloft.net>

mISDN: Help to identify the card

With multiple cards is hard to figure out which port caused trouble
int the layer2 routines (e.g. got a timeout).
Now we have the informations in the log output.

Signed-off-by: Karsten Keil <kkeil@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

mISDN: L2 timeouts need to be queued as L2 event

To be full preemptiv safe, we cannot handle a L2 timeout in the timer
context itself, we should do all actions via the D-channel thread.

Signed-off-by: Karsten Keil <kkeil@linux-pingi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

isdn: whitespace coding style cleanup

isdn source code uses a not-current coding style.

Update the coding style used on a per-line basis
so that git diff -w shows only elided blank lines
at EOF.

Done with emacs and some scripts and some typing.

Built x86 allyesconfig.
No detected change in objdump -d or size.

Signed-off-by: Joe Perches <joe@perches.com>

mISDN: fix "persistant" typo

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>

drivers/isdn/mISDN: Use printf extension %pV

Using %pV reduces the number of printk calls and
eliminates any possible message interleaving from
other printk calls.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.

2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).

* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

ISDN: ARRAY_SIZE changes

These changes were a direct result of using a semantic patch
More information can be found at http://www.emn.fr/x-info/coccinelle/

Modified some of the changes to avoid the extra define.

Signed-off-by: Stoyan Gaydarov <sgayda2@uiuc.edu>
Signed-off-by: Karsten Keil <keil@b1-systems.de>

mISDN: Add "sapi" information to debug messages

Using sapi values other than 0 work now.
The "OpenBSC" project does not require special kernel patch anymore.

Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

mISDN: Fix TEI and SAPI handling

Added SAPI value to use SAPIs different than 0.

Now fixed TEIs work in NT mode. This allows PTP endpoint to be connected
to PTMP ports together with other PTMP endpoints.

New enhanced version, thanks to Sam Ravnborg <sam@ravnborg.org> for the
hints.

Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

mISDN: make global symbols static or include header files

The warnings fixed by including an header file for the appropriate
prototype are marked with "*", for all others the corresonponding
symbol has been made static. This patch fixes all such issues in
mISDN.

Fix this sparse warnings:

drivers/isdn/hardware/mISDN/hfcmulti.c:174:5: warning: symbol 'plxsd_master' was not declared. Should it be static?
drivers/isdn/hardware/mISDN/hfcmulti.c:426:1: warning: symbol 'write_fifo_regio' was not declared. Should it be static?
drivers/isdn/hardware/mISDN/hfcmulti.c:447:1: warning: symbol 'write_fifo_pcimem' was not declared. Should it be static?
drivers/isdn/hardware/mISDN/hfcmulti.c:469:1: warning: symbol 'read_fifo_regio' was not declared. Should it be static?
drivers/isdn/hardware/mISDN/hfcmulti.c:491:1: warning: symbol 'read_fifo_pcimem' was not declared. Should it be static?
drivers/isdn/hardware/mISDN/hfcmulti.c:710:1: warning: symbol 'vpm_init' was not declared. Should it be static?
drivers/isdn/hardware/mISDN/hfcmulti.c:793:1: warning: symbol 'vpm_check' was not declared. Should it be static?
drivers/isdn/hardware/mISDN/hfcmulti.c:816:1: warning: symbol 'vpm_echocan_on' was not declared. Should it be static?
drivers/isdn/hardware/mISDN/hfcmulti.c:848:1: warning: symbol 'vpm_echocan_off' was not declared. Should it be static?
* drivers/isdn/mISDN/l1oip_codec.c:224:1: warning: symbol 'l1oip_law_to_4bit' was not declared. Should it be static?
* drivers/isdn/mISDN/l1oip_codec.c:261:1: warning: symbol 'l1oip_4bit_to_law' was not declared. Should it be static?
* drivers/isdn/mISDN/l1oip_codec.c:281:1: warning: symbol 'l1oip_alaw_to_ulaw' was not declared. Should it be static?
* drivers/isdn/mISDN/l1oip_codec.c:294:1: warning: symbol 'l1oip_ulaw_to_alaw' was not declared. Should it be static?
* drivers/isdn/mISDN/l1oip_codec.c:311:1: warning: symbol 'l1oip_4bit_free' was not declared. Should it be static?
* drivers/isdn/mISDN/l1oip_codec.c:322:1: warning: symbol 'l1oip_4bit_alloc' was not declared. Should it be static?
drivers/isdn/mISDN/core.c:29:1: warning: symbol 'device_lock' was not declared. Should it be static?
drivers/isdn/mISDN/core.c:34:1: warning: symbol 'bp_lock' was not declared. Should it be static?
drivers/isdn/mISDN/core.c:196:1: warning: symbol 'mISDNInit' was not declared. Should it be static?
drivers/isdn/mISDN/core.c:227:6: warning: symbol 'mISDN_cleanup' was not declared. Should it be static?
drivers/isdn/mISDN/stack.c:40:1: warning: symbol 'mISDN_queue_message' was not declared. Should it be static?
* drivers/isdn/mISDN/layer1.c:388:1: warning: symbol 'l1_init' was not declared. Should it be static?
* drivers/isdn/mISDN/layer1.c:400:1: warning: symbol 'l1_cleanup' was not declared. Should it be static?
drivers/isdn/mISDN/layer2.c:469:1: warning: symbol 'iframe_error' was not declared. Should it be static?
drivers/isdn/mISDN/layer2.c:487:1: warning: symbol 'super_error' was not declared. Should it be static?
drivers/isdn/mISDN/layer2.c:496:1: warning: symbol 'unnum_error' was not declared. Should it be static?
drivers/isdn/mISDN/layer2.c:509:1: warning: symbol 'UI_error' was not declared. Should it be static?
drivers/isdn/mISDN/layer2.c:522:1: warning: symbol 'FRMR_error' was not declared. Should it be static?
drivers/isdn/mISDN/layer2.c:1069:1: warning: symbol 'enquiry_cr' was not declared. Should it be static?
* drivers/isdn/mISDN/layer2.c:2196:1: warning: symbol 'Isdnl2_Init' was not declared. Should it be static?
* drivers/isdn/mISDN/layer2.c:2210:1: warning: symbol 'Isdnl2_cleanup' was not declared. Should it be static?
drivers/isdn/mISDN/tei.c:397:1: warning: symbol 'random_ri' was not declared. Should it be static?
* drivers/isdn/mISDN/timerdev.c:277:1: warning: symbol 'mISDN_inittimer' was not declared. Should it be static?
* drivers/isdn/mISDN/timerdev.c:288:6: warning: symbol 'mISDN_timer_cleanup' was not declared. Should it be static?
drivers/isdn/mISDN/dsp_core.c:164:12: warning: symbol 'mISDN_dsp_revision' was not declared. Should it be static?
drivers/isdn/mISDN/dsp_cmx.c:1543:5: warning: symbol 'samplecount' was not declared. Should it be static?
drivers/isdn/mISDN/dsp_cmx.c:1546:5: warning: symbol 'dsp_start_jiffies' was not declared. Should it be static?
drivers/isdn/mISDN/dsp_cmx.c:1547:16: warning: symbol 'dsp_start_tv' was not declared. Should it be static?
drivers/isdn/mISDN/dsp_tones.c:239:3: warning: symbol 'pattern' was not declared. Should it be static?
drivers/isdn/mISDN/dsp_audio.c:33:4: warning: symbol 'dsp_audio_ulaw_to_alaw' was not declared. Should it be static?

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Acked-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

mISDN: consistently define 'debug' as '*u_int'

Impact: change data type for variable 'debug' from *int to *u_int,
same for the argument type of mISDN_inittimer

In "core.h" mISDN_inittimer is declared with the argument type "*u_int", make
the definition in "timerdev.c" match this.

This fixes also this warnings:

drivers/isdn/mISDN/layer1.c:391:8: warning: incorrect type in assignment (different signedness)
drivers/isdn/mISDN/layer1.c:391:8: expected int *static [toplevel] debug
drivers/isdn/mISDN/layer1.c:391:8: got unsigned int [usertype] *deb
drivers/isdn/mISDN/layer2.c:2200:8: warning: incorrect type in assignment (different signedness)
drivers/isdn/mISDN/layer2.c:2200:8: expected int *static [toplevel] debug
drivers/isdn/mISDN/layer2.c:2200:8: got unsigned int [usertype] *deb
drivers/isdn/mISDN/socket.c:769:8: warning: incorrect type in assignment (different signedness)
drivers/isdn/mISDN/socket.c:769:8: expected int *static [toplevel] debug
drivers/isdn/mISDN/socket.c:769:8: got unsigned int [usertype] *deb

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Acked-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix namespace issue with Hisax

you can pull this git://git./linux/kernel/git/kkeil/ISDN-2.6 master

rename release_tei() to TEIrelease() because release_tei() was
already exported bei the old HiSax driver.

Signed-off-by: Karsten Keil <kkeil@suse.de>

Add mISDN core files

Add mISDN core files

Signed-off-by: Karsten Keil <kkeil@suse.de>