Commit Graph

91 Commits

Author SHA1 Message Date
Johannes Thumshirn 0f64507473 staging: line6/config.h: Delete unused header
Delete unused header file drivers/staging/line6/config.h

Signed-off-by: Johannes Thumshirn <morbidrsa@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-18 17:13:52 -07:00
Johannes Thumshirn c15974ef1f staging: line6/config.h: Remove CHECKPOINT macro
Kill unused debugging macro CHECKPOINT

Signed-off-by: Johannes Thumshirn <morbidrsa@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-14 13:01:44 -07:00
Johannes Thumshirn 82a74d4a80 staging: line6/pcm.c: Removed trailing whitespace
Removed a line of only whitespace

Signed-off-by: Johannes Thumshirn <morbidrsa@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-09 13:49:40 -07:00
Johannes Thumshirn bc8fa144af staging: line6/midi.c: Added space between switch and open parenthesis
Added space between switch and open parenthesis to make checkpatch.pl happy

Signed-off-by: Johannes Thumshirn <morbidrsa@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-09 13:49:01 -07:00
Johannes Thumshirn 8878451510 staging: line6/midibuf.c changed printk(KERN_DEBUG, ... to pr_debug(
Changed printk(KERN_DEBUG, ...) call to pr_debug call in function
void line6_midibuf_status(struct MidiBuffer *this)

Signed-off-by: Johannes Thumshirn <morbidrsa@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-09 13:48:08 -07:00
Greg Kroah-Hartman aa8f827a4d staging: line6: toneport.c: remove err() usage
err() was a very old USB-specific macro that I thought had
gone away.  This patch removes it from being used in the
driver and uses dev_err() instead.

CC: Markus Grabner <grabner@icg.tugraz.at>
CC: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-23 16:46:04 -07:00
Greg Kroah-Hartman 4a6313644c Staging: line6: use module_usb_driver()
Now that our module_init/exit path is just registering and unregistering
the usb driver, we can use module_usb_driver() instead.  This also has
the nice side affect of removing the unneeded printk for the module
version number.

CC: Markus Grabner <grabner@icg.tugraz.at>
CC: Stefan Hajnoczi <stefanha@gmail.com>
CC: Julia Lawall <julia@diku.dk>
CC: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-23 16:13:19 -07:00
Greg Kroah-Hartman 15a89dc83b Staging: line6: remove teardown code from module_exit path
These pcm values should all be stopped properly when the device is
removed from the system (i.e. when disconnect is called), so there's no
need to duplicate this when the module is unloaded as well.

CC: Markus Grabner <grabner@icg.tugraz.at>
CC: Stefan Hajnoczi <stefanha@gmail.com>
CC: Julia Lawall <julia@diku.dk>
CC: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-23 16:11:26 -07:00
Greg Kroah-Hartman c46b8a6567 Staging: line6: only allocate a buffer if it is needed
Only allocate the version request buffer if it is needed, not when the
module starts up.  This will let us make the module_init path much
smaller.

CC: Markus Grabner <grabner@icg.tugraz.at>
CC: Stefan Hajnoczi <stefanha@gmail.com>
CC: Julia Lawall <julia@diku.dk>
CC: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-23 16:09:56 -07:00
Greg Kroah-Hartman 305b8766a9 Staging: line6: remove unneeded initialization
Static variables are initialized to NULL, no need to do it again in the
module_init function.

CC: Markus Grabner <grabner@icg.tugraz.at>
CC: Stefan Hajnoczi <stefanha@gmail.com>
CC: Julia Lawall <julia@diku.dk>
CC: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-04-23 15:59:17 -07:00
Markus Grabner 0ca5488806 staging: line6: separate handling of buffer allocation and stream startup
There are several features of the Line6 USB driver which require PCM
data to be exchanged with the device:
*) PCM playback and capture via ALSA
*) software monitoring (for devices without hardware monitoring)
*) optional impulse response measurement
However, from the device's point of view, there is just a single
capture and playback stream, which must be shared between these
subsystems. It is therefore necessary to maintain the state of the
subsystems with respect to PCM usage. We define several constants of
the form LINE6_BIT_PCM_<subsystem>_<direction>_<resource> with the
following meanings:
*) <subsystem> is one of
-) ALSA: PCM playback and capture via ALSA
-) MONITOR: software monitoring
-) IMPULSE: optional impulse response measurement
*) <direction> is one of
-) PLAYBACK: audio output (from host to device)
-) CAPTURE: audio input (from device to host)
*) <resource> is one of
-) BUFFER: buffer required by PCM data stream
-) STREAM: actual PCM data stream

The subsystems call line6_pcm_acquire() to acquire the (shared)
resources needed for a particular operation (e.g., allocate the buffer
for ALSA playback or start the capture stream for software monitoring).
When a resource is no longer needed, it is released by calling
line6_pcm_release(). Buffer allocation and stream startup are handled
separately to allow the ALSA kernel driver to perform them at
appropriate places (since the callback which starts a PCM stream is not
allowed to sleep).

Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-09 09:14:35 -08:00
Markus Grabner 12177acdec staging: line6: use source select control for UX2 devices
Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-09 09:14:35 -08:00
Markus Grabner 3784129a9d staging: line6: removed obsolete code
Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-09 09:14:35 -08:00
Markus Grabner 6b02a17ee5 staging: line6: fixed ALSA/PCM interaction
The PCM subsystem in the Line6 driver is mainly used for PCM playback and
capture by ALSA, but also has other tasks, most notably providing a
low-latency software monitor for devices which don't support hardware
monitoring (e.g., the TonePort series). This patch makes ALSA "play nicely"
with the other components, i.e., prevents it from resetting the isochronous
USB transfer while other PCM tasks (software monitoring) are running.

Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-12-09 19:26:09 -08:00
Stefan Hajnoczi 665f3f506b staging: line6: wait for urbs in snd_line6_prepare()
The .trigger() pcm callbacks are not allowed to block and cannot wait
until urbs have completed.  We need to ensure that stopping, preparing,
and then restarting a stream always works.

Currently the driver will sometimes return -EBUSY when restarting the
stream because urbs have not completed yet.  This can be triggered by
jackd from userspace.

The solution is to wait on urbs in the .prepare() pcm callback since
blocking is allowed in that callback.  This guarantees that all urbs are
quiesced and ready to be submitted when the start trigger callback is
invoked.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-12-09 19:26:09 -08:00
Stefan Hajnoczi 188e664502 staging: line6: eliminate useless NULL checks
The line6 driver checks struct field addresses for NULL where it does
not make sense to do so.  The struct has already been checked for NULL
and there is no value in checking the first field's address too.

Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-12-09 19:26:09 -08:00
Stefan Hajnoczi 153e38761d staging: line6: eliminate useless index_out variable
Playback urbs use the index_out counter to decide which part of the
playback buffer to use.  Since the urb already has a unique index in
range [0, LINE6_ISO_BUFFERS) there is no need to keep a separate
counter.

Use the urb index instead.  This also eliminates the possibility of two
urbs using the same playback buffer space if they ever complete
out-of-order for some reason.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-12-09 19:26:09 -08:00
Stefan Hajnoczi 2f637ee42d staging: line6: fix playback urb transfer buffer calculation
The playback urb transfer buffer calculation does not factor in
LINE6_ISO_PACKETS.  Buffer memory is organized like this in the driver:

  Buffer 0                 Buffer 1                 ...
  [Packet 0, Packet 1, ...][Packet 0, Packet 1, ...][Packet 0, ...]

However, we're lucky that LINE6_ISO_PACKETS is currently defined as 1 so
this patch does not change any behavior.  It's still worth including
this fix in case the LINE6_ISO_PACKETS value is changed in the future.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-12-09 19:26:09 -08:00
Stefan Hajnoczi 60c01a9778 staging: line6: fix memory leak in .hw_params()
The .hw_params() pcm callback can be invoked multiple times in a row.
Ensure that the URB data buffer is only allocated once.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-12-09 19:26:09 -08:00
Markus Grabner 4c6fb5fc05 staging/line6: refactor device information and add POD HD 500
This patch refactors the device information code and adds preliminary support for the POD HD 500 device.

Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-12-08 12:33:49 -08:00
Markus Grabner 3b35de4126 staging/line6: Remove obsolete code
This patch removes experimental code which is no longer used.

Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-12-08 12:33:48 -08:00
Andor Daam 251c394880 Staging: line6/midi.c: Fixed call of obsolete function strict_strtoul
The obsolete function strict_strtoul should be replaced by the kstrto*
functions.

In this context kstrtou16 should be use, as midi_mask_receive is only
used as unsigned short. All corresponding datatypes were adapted
accordingly.

Signed-off-by: Andor Daam <andor.daam@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-12-08 12:32:55 -08:00
Andor Daam 4d85fae04f Staging: line6/midi.c: Fixed call of obsolete function strict_strtoul
The function strict_strtoul is obsolete and should be replaced by the
new kstrto* functions.

The variable midi_mask_transmit is only used as unsigned short and the
datatypes of all affected variables were adjusted accordingly.

Signed-off-by: Andor Daam <andor.daam@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-12-08 12:32:54 -08:00
Dan Carpenter 4bd8b4de6f Staging: line6: NULL dereference in dev_err()
"line6" hasn't been set at this point and we should be using
&interface->dev instead.

Gcc would have complained about this if it weren't for the fact that we
initialized line6 to NULL.  I removed the initialization.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-12-01 09:57:32 -08:00
Thomas Meyer cff863871e Staging: line6: Use kmemdup rather than duplicating its implementation
Use kmemdup rather than duplicating its implementation

 The semantic patch that makes this change is available
 in scripts/coccinelle/api/memdup.cocci.

 More information about semantic patching is available at
 http://coccinelle.lip6.fr/

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-11-26 16:14:57 -08:00
Stefan Hajnoczi 140e28b83c staging: line6: alloc/free buffers in hw_params/hw_free
It is unsafe to free buffers in line6_pcm_stop(), which is not allowed
to sleep, since urbs cannot be killed completely there and only
unlinked.  This means I/O may still be in progress and the URB
completion function still gets invoked.  This may result in memory
corruption when buffer_in is freed but I/O is still pending.

Additionally, line6_pcm_start() is not supposed to sleep so it should
not use kmalloc(GFP_KERNEL).

These issues can be resolved by performing buffer allocation/freeing in
the .hw_params/.hw_free callbacks instead.  The ALSA documentation also
recommends doing buffer allocation/freeing in these callbacks.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-11-26 16:14:12 -08:00
Stefan Hajnoczi 3b08db37cb staging: line6: use smallest iso ep packet size
The POD HD300 isochronous endpoints have different max packet sizes for
read and write.  Using the read endpoint max packet size may be too
large for the write endpoint.  Instead we should use the minimum of both
endpoints to be sure the size is acceptable.

In theory we could decouple read and write packet sizes but the driver
currently uses a single size which I chose not to mess with since other
features like software monitoring may depend on a single packet size for
both endpoints.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-11-26 16:14:12 -08:00
Stefan Hajnoczi 1dc403ffec staging: line6: add missing MIDI postprocessing case for POD HD300
The driver leaves MIDI processing up to userspace for the POD HD300
device.  Add a missing case statement to skip MIDI postprocessing in the
driver.  This change has no effect other than silencing a printk:

  line6usb driver bug: missing case in linux/drivers/staging/line6/midi.c:179

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-11-26 16:14:11 -08:00
Stefan Hajnoczi 16dc104011 staging: line6: add Pod HD300 support
The Pod HD device family uses new MIDI SysEx messages and therefore
cannot reuse the existing Pod code.  Instead of hardcoding Pod HD MIDI
messages into the driver, leave MIDI up to userspace.  This driver
simply presents MIDI and pcm ALSA devices.

This device is similar to the Pod except that it has 48 kHz audio and
does not respond to Pod SysEx messages.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-11-26 16:14:11 -08:00
Jesper Juhl 982d6ab501 line6: fix memory leaks in line6_init_midi()
If the first call to line6_midibuf_init() fails we'll leak a little
bit of memory. If the second call fails we'll leak a bit more. This
happens when we return from the function and the local variable
'line6midi' goes out of scope.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-11-26 16:14:11 -08:00
Paul Gortmaker 8e336a722b staging: Add export.h for THIS_MODULE/EXPORT_SYMBOL to drivers/staging users.
Lots of drivers have in the past expected the presence of basic things
like THIS_MODULE and EXPORT_SYMBOL.  With the header cleanup, they wont
have these.  Call out the include explicitly.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-31 19:32:08 -04:00
Julia Lawall c5cbebf87f drivers/staging/line6/driver.c: Drop unneeded put functions.
This seems to be the result of patches ab366c1a and 1027f476 crossing each
other.  Patch ab366c1a adds calls to usb_put_intf and usb_put_dev at the
end of the function line6_probe, in the error handling code, while patch
1027f476 moves the calls to the corresponding get function from the
beginning to the end of line6_probe, making the calls to put in the error
handling code unnecessary.

// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-17 13:31:32 -07:00
Ilia Mirkin 43c04d42c3 staging: line6: Remove NULL check before kfree
This patch was generated by the following semantic patch:
// <smpl>
@@ expression E; @@
- if (E != NULL) { kfree(E); }
+ kfree(E);

@@ expression E; @@
- if (E != NULL) { kfree(E); E = NULL; }
+ kfree(E);
+ E = NULL;
// </smpl>

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-03-14 11:57:33 -07:00
Peter Huewe 597a1e7ccc staging/line6: Fix sparse warning 'Using plain integer as NULL pointer'
This patch fixes the warning generated by sparse: "Using plain integer
as NULL pointer" by replacing the offending 0s with NULL.

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-12-08 14:31:01 -08:00
Greg Kroah-Hartman a3a972a053 Staging: line6: fix up my fixup for some sysfs attribute permissions
They should be writable by root, not readable.
Doh, stupid me with the wrong flags.

Reported-by: Jonathan Cameron <jic23@cam.ac.uk>
Cc: Markus Grabner <grabner@icg.tugraz.at>
Cc: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-18 11:27:20 -08:00
Greg Kroah-Hartman 2018845b6a Staging: line6: fix up some sysfs attribute permissions
They should not be writable by any user

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Markus Grabner <grabner@icg.tugraz.at>
Cc: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-11-16 11:23:33 -08:00
Tracey Dent 1954cbf0bf Staging: line6: Makefile: replace the use of <module>-objs with <module>-y
Changed <module>-objs to <module>-y in Makefile.

Signed-off-by: Tracey Dent <tdent48227@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-10-08 07:23:47 -07:00
Greg Kroah-Hartman 027360c564 Staging: line6: minor coding style cleanups
This fixes up all of the remaining coding style issues that
make any sense to make in the line6 driver.

Cc: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-21 16:58:00 -07:00
Greg Kroah-Hartman 79be7254eb staging: line6: remove unneeded EXPORT_SYMBOL() usage
These symbols don't need to be exported as nothing uses them, so don't.

Cc: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-21 16:18:13 -07:00
Markus Grabner c7fcf25525 Staging: line6: workaround for null pointer bug
Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-09-20 17:04:35 -07:00
Markus Grabner e1a164d7a3 Staging: line6: another upstream sync
Everything should be in sync now.

Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-08-31 15:28:16 -07:00
Markus Grabner 1027f476f5 staging: line6: sync with upstream
Big upstream sync.

Signed-off-by: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-08-31 15:28:15 -07:00
Randy Dunlap e928c077e5 Staging: line6: needs to select SND_PCM
line6 uses snd_pcm*() functions, so it should select SND_PCM.

ERROR: "snd_pcm_period_elapsed" [drivers/staging/line6/line6usb.ko] undefined!
ERROR: "snd_pcm_set_ops" [drivers/staging/line6/line6usb.ko] undefined!
ERROR: "snd_pcm_lib_free_pages" [drivers/staging/line6/line6usb.ko] undefined!
ERROR: "snd_pcm_lib_ioctl" [drivers/staging/line6/line6usb.ko] undefined!
ERROR: "snd_pcm_lib_malloc_pages" [drivers/staging/line6/line6usb.ko] undefined!
ERROR: "snd_pcm_hw_constraint_ratdens" [drivers/staging/line6/line6usb.ko] undefined!
ERROR: "snd_pcm_format_physical_width" [drivers/staging/line6/line6usb.ko] undefined!
ERROR: "snd_pcm_lib_preallocate_pages_for_all" [drivers/staging/line6/line6usb.ko] undefined!
ERROR: "snd_pcm_new" [drivers/staging/line6/line6usb.ko] undefined!

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Markus Grabner <grabner@icg.tugraz.at>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-28 08:20:55 -07:00
Kulikov Vasiliy ab366c1a23 Staging: line6: fix leaks in line6_probe()
If error occurs line6_probe() must put interface and usbdev that were
got before.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-22 11:30:49 -07:00
Julia Lawall 94002c07ff Staging: Use kmemdup
Use kmemdup when some other buffer is immediately copied into the
allocated region.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
statement S;
@@

-  to = \(kmalloc\|kzalloc\)(size,flag);
+  to = kmemdup(from,size,flag);
   if (to==NULL || ...) S
-  memcpy(to, from, size);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-17 16:31:15 -07:00
Greg Kroah-Hartman 1e18c0d5b4 Staging: line6: driver: fix up sparse warnings
minor stuff.

Cc: Markus Grabner <grabner@icg.tugraz.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-11 11:36:11 -07:00
Johan Meiring c98aaf8555 Staging: line6: rewrote inline comments in control.h
This is a patch to control.h that presents certain inline comments in a
neater way, and which eliminates the 80 character error found by the
checkpatch.pl tool.

Signed-off-by: Johan Meiring <johanmeiring@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-11 11:35:53 -07:00
Tejun Heo 5a0e3ad6af 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>
2010-03-30 22:02:32 +09:00
Sylvain Trias 0f7cf0034c Staging: line6: variax.c: fixed a space a "x ? a : b" coding style issue
Fixed a coding style issue.

Signed-off-by: Sylvain Trias <bozo@nobodix.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:43:04 -08:00
Németh Márton a457732b83 staging: make USB device id constant
The id_table field of the struct usb_device_id is constant in <linux/usb.h>
so it is worth to make the initialization data also constant.

The semantic match that finds this kind of pattern is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
disable decl_init,const_decl_init;
identifier I1, I2, x;
@@
	struct I1 {
	  ...
	  const struct I2 *x;
	  ...
	};
@s@
identifier r.I1, y;
identifier r.x, E;
@@
	struct I1 y = {
	  .x = E,
	};
@c@
identifier r.I2;
identifier s.E;
@@
	const struct I2 E[] = ... ;
@depends on !c@
identifier r.I2;
identifier s.E;
@@
+	const
	struct I2 E[] = ...;
// </smpl>

Signed-off-by: Németh Márton <nm127@freemail.hu>
Cc: Julia Lawall <julia@diku.dk>
Cc: cocci@diku.dk
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-03 16:42:42 -08:00