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path: root/drivers/usb/serial/navman.c
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2017-11-04USB: serial: fix module-license macrosJohan Hovold
Several GPL-2.0 drivers used "GPL" rather than "GPL v2" in their MODULE_LICENSE macros; fix the macros to match the licenses. Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-04USB: serial: Remove redundant license textGreg Kroah-Hartman
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-04USB: add SPDX identifiers to all remaining files in drivers/usb/Greg Kroah-Hartman
It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the drivers/usb/ and include/linux/usb* files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-08usb: delete non-required instances of include <linux/init.h>Paul Gortmaker
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15TTY: switch tty_flip_buffer_pushJiri Slaby
Now, we start converting tty buffer functions to actually use tty_port. This will allow us to get rid of the need of tty in many call sites. Only tty_port will needed and hence no more tty_port_tty_get in those paths. Now, the one where most of tty_port_tty_get gets removed: tty_flip_buffer_push. IOW we also closed all the races in drivers not using tty_port_tty_get at all yet. Also we move tty_flip_buffer_push declaration from include/linux/tty.h to include/linux/tty_flip.h to all others while we are changing it anyway. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-15TTY: switch tty_insert_flip_stringJiri Slaby
Now, we start converting tty buffer functions to actually use tty_port. This will allow us to get rid of the need of tty in many call sites. Only tty_port will needed and hence no more tty_port_tty_get in those paths. tty_insert_flip_string this time. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-18USB: Serial: navman.c: remove debug module parameterGreg Kroah-Hartman
Now that all usb-serial modules are only using dev_dbg() the debug module parameter does not do anything at all, so remove it to reduce any confusion if someone were to try to use it. CC: Rusty Russell <rusty@rustcorp.com.au> CC: Alan Stern <stern@rowland.harvard.edu> CC: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-18USB: serial: remove debug parameter from usb_serial_debug_data()Greg Kroah-Hartman
We should use dev_dbg() for usb_serial_debug_data() like all of the rest of the usb-serial drivers use, so remove the debug parameter as it's not needed. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-15USB: navman.c: remove dbg() usageGreg Kroah-Hartman
dbg() is a usb-serial specific macro. This patch converts the navman.c driver to use dev_dbg() instead to tie into the dynamic debug infrastructure. CC: Rusty Russell <rusty@rustcorp.com.au> CC: Alan Stern <stern@rowland.harvard.edu> CC: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-08USB: serial: rework usb_serial_register/deregister_drivers()Greg Kroah-Hartman
This reworks the usb_serial_register_drivers() and usb_serial_deregister_drivers() to not need a pointer to a struct usb_driver anymore. The usb_driver structure is now created dynamically and registered and unregistered as needed. This saves lines of code in each usb-serial driver. All in-kernel users of these functions were also fixed up at this time. The pl2303 driver was tested that everything worked properly. Thanks for the idea to do this from Alan Stern. Cc: Adhir Ramjiawan <adhirramjiawan0@gmail.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Al Borchers <alborchers@steinerpoint.com> Cc: Aleksey Babahin <tamerlan311@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andrew Worsley <amworsley@gmail.com> Cc: Bart Hartgers <bart.hartgers@gmail.com> Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Dan Carpenter <error27@gmail.com> Cc: Dan Williams <dcbw@redhat.com> Cc: Donald Lee <donald@asix.com.tw> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Gary Brubaker <xavyer@ix.netcom.com> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Johan Hovold <jhovold@gmail.com> Cc: Julia Lawall <julia@diku.dk> Cc: Kautuk Consul <consul.kautuk@gmail.com> Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Cc: Lonnie Mendez <dignome@gmail.com> Cc: Matthias Bruestle and Harald Welte <support@reiner-sct.com> Cc: Matthias Urlichs <smurf@smurf.noris.de> Cc: Mauro Carvalho Chehab <mchehab@redhat.com> Cc: Michal Sroczynski <msroczyn@gmail.com> Cc: "Michał Wróbel" <michal.wrobel@flytronic.pl> Cc: Oliver Neukum <oliver@neukum.name> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Peter Berger <pberger@brimson.com> Cc: Preston Fick <preston.fick@silabs.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Rigbert Hamisch <rigbert@gmx.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Simon Arlott <simon@fire.lp0.eu> Cc: Support Department <support@connecttech.com> Cc: Thomas Tuttle <ttuttle@chromium.org> Cc: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de> Cc: Wang YanQing <Udknight@gmail.com> Cc: William Greathouse <wgreathouse@smva.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-07USB: serial: remove usb_serial_disconnect call in all driversGreg Kroah-Hartman
This is now set by the usb-serial core, no need for the driver to individually set it. Thanks to Alan Stern for the idea to get rid of it. Cc: William Greathouse <wgreathouse@smva.com> Cc: Matthias Bruestle and Harald Welte <support@reiner-sct.com> Cc: Lonnie Mendez <dignome@gmail.com> Cc: Peter Berger <pberger@brimson.com> Cc: Al Borchers <alborchers@steinerpoint.com> Cc: Gary Brubaker <xavyer@ix.netcom.com> Cc: Oliver Neukum <oliver@neukum.name> Cc: Matthias Urlichs <smurf@smurf.noris.de> Cc: Support Department <support@connecttech.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Mauro Carvalho Chehab <mchehab@redhat.com> Cc: Kautuk Consul <consul.kautuk@gmail.com> Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Bart Hartgers <bart.hartgers@gmail.com> Cc: Johan Hovold <jhovold@gmail.com> Cc: Preston Fick <preston.fick@silabs.com> Cc: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de> Cc: Simon Arlott <simon@fire.lp0.eu> Cc: Andrew Worsley <amworsley@gmail.com> Cc: "Michał Wróbel" <michal.wrobel@flytronic.pl> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Aleksey Babahin <tamerlan311@gmail.com> Cc: Dan Carpenter <error27@gmail.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Donald Lee <donald@asix.com.tw> Cc: Julia Lawall <julia@diku.dk> Cc: Michal Sroczynski <msroczyn@gmail.com> Cc: Wang YanQing <Udknight@gmail.com> Cc: Dan Williams <dcbw@redhat.com> Cc: Thomas Tuttle <ttuttle@chromium.org> Cc: Rigbert Hamisch <rigbert@gmx.de> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Adhir Ramjiawan <adhirramjiawan0@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-07USB: serial: remove usb_serial_probe call in all driversGreg Kroah-Hartman
This is now set by the usb-serial core, no need for the driver to individually set it. Thanks to Alan Stern for the idea to get rid of it. Cc: William Greathouse <wgreathouse@smva.com> Cc: Matthias Bruestle and Harald Welte <support@reiner-sct.com> Cc: Lonnie Mendez <dignome@gmail.com> Cc: Peter Berger <pberger@brimson.com> Cc: Al Borchers <alborchers@steinerpoint.com> Cc: Gary Brubaker <xavyer@ix.netcom.com> Cc: Oliver Neukum <oliver@neukum.name> Cc: Matthias Urlichs <smurf@smurf.noris.de> Cc: Support Department <support@connecttech.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Mauro Carvalho Chehab <mchehab@redhat.com> Cc: Kautuk Consul <consul.kautuk@gmail.com> Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Bart Hartgers <bart.hartgers@gmail.com> Cc: Johan Hovold <jhovold@gmail.com> Cc: Preston Fick <preston.fick@silabs.com> Cc: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de> Cc: Simon Arlott <simon@fire.lp0.eu> Cc: Andrew Worsley <amworsley@gmail.com> Cc: "Michał Wróbel" <michal.wrobel@flytronic.pl> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Aleksey Babahin <tamerlan311@gmail.com> Cc: Dan Carpenter <error27@gmail.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Donald Lee <donald@asix.com.tw> Cc: Julia Lawall <julia@diku.dk> Cc: Michal Sroczynski <msroczyn@gmail.com> Cc: Wang YanQing <Udknight@gmail.com> Cc: Dan Williams <dcbw@redhat.com> Cc: Thomas Tuttle <ttuttle@chromium.org> Cc: Rigbert Hamisch <rigbert@gmx.de> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Cc: Jesper Juhl <jj@chaosbits.net> Cc: Adhir Ramjiawan <adhirramjiawan0@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-03USB: navman.c: remove dbg() tracing callsGreg Kroah-Hartman
dbg() was used a lot a long time ago to trace code flow. Now that we have ftrace, this isn't needed at all, so remove these calls. CC: Rusty Russell <rusty@rustcorp.com.au> CC: Alan Stern <stern@rowland.harvard.edu> CC: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-28USB: serial: navman.c: use module_usb_serial_driverGreg Kroah-Hartman
This converts the navman.c driver to use the module_usb_serial_driver() call instead of having to have a module_init/module_exit function, saving a lot of duplicated code. CC: Rusty Russell <rusty@rustcorp.com.au> CC: Alan Stern <stern@rowland.harvard.edu> CC: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-24usb-serial: use new registration API in [n-p]* driversAlan Stern
This patch (as1527) modifies the following usb-serial drivers to utilize the new usb_serial_{de}register_drivers() routines: navman, omninet, opticon, option, oti6858, and pl2303. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-01-13module_param: make bool parameters really bool (drivers & misc)Rusty Russell
module_param(bool) used to counter-intuitively take an int. In fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy trick. It's time to remove the int/unsigned int option. For this version it'll simply give a warning, but it'll break next kernel version. Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-08-23USB: add device IDs for igotu to navmanRoss Burton
I recently bought a i-gotU USB GPS, and whilst hunting around for linux support discovered this post by you back in 2009: http://kerneltrap.org/mailarchive/linux-usb/2009/3/12/5148644 >Try the navman driver instead. You can either add the device id to the > driver and rebuild it, or do this before you plug the device in: > modprobe navman > echo -n "0x0df7 0x0900" > /sys/bus/usb-serial/drivers/navman/new_id > > and then plug your device in and see if that works. I can confirm that the navman driver works with the right device IDs on my i-gotU GT-600, which has the same device IDs. Attached is a patch adding the IDs. From: Ross Burton <ross@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo
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>
2010-03-02USB: tty: Prune uses of tty_request_room in the USB layerAlan Cox
We have lots of callers that do not need to do this in the first place. Remove the calls as they both cost CPU and for big buffers can mess up the multi-page allocation avoidance. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-02USB serial: make USB device id constantNémeth Márton
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>
2009-09-19tty: USB does not need the filp argument in the driversAlan Cox
And indeed none of them use it. Clean this up as it will make moving to a standard open method rather easier. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-11tty: Bring the usb tty port structure into more useAlan Cox
This allows us to clean stuff up, but is probably also going to cause some app breakage with buggy apps as we now implement proper POSIX behaviour for USB ports matching all the other ports. This does also mean other apps that break on USB will now work properly. Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-13tty: usb-serial krefsAlan Cox
Use kref in the USB serial drivers so that we don't free tty structures from under the URB receive handlers as has historically been the case if you were unlucky. This also gives us a framework for general tty drivers to use tty_port objects and refcount. Contains two err->dev_err changes merged together to fix clashes in the -next tree. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-22usb_serial: API all changeAlan Cox
USB serial likes to use port->tty back pointers for the real work it does and to do so without any actual locking. Unfortunately when you consider hangup events, hangup/parallel reopen or even worse hangup followed by parallel close events the tty->port and port->tty pointers are not guaranteed to be the same as port->tty is the active tty while tty->port is the port the tty may or may not still be attached to. So rework the entire API to pass the tty struct. For console cases we need to pass both for now. This shows up multiple drivers that immediately crash with USB console some of which have been fixed in the process. Longer term we need a proper tty as console abstraction Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-24usb serial: more fixes and groundwork for tty changesAlan Cox
- If a termios change fails due to lack of memory we should copy the old settings back over as the device has not changed - Note various locking problems - kl5kusb105 had various remaining tty flag handling problems - Make safe_serial use tty_insert_flip_string not open coded loops - set termios speed properly in usb_serial Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: replace remaining __FUNCTION__ occurrencesHarvey Harrison
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: serial: remove unneeded number endpoints settingsGreg Kroah-Hartman
The usb-serial core no longer checks these fields so remove them from all of the individual drivers. They will be removed from the usb-serial core in a patch later in the series. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-12USB: serial: navman: clean up urb->status usageGreg Kroah-Hartman
This done in anticipation of removal of urb->status, which will make that patch easier to review and apply in the future. Cc: <linux-usb-devel@lists.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-02-07USB serial: add driver pointer to all usb-serial driversJohannes Hölzl
Every usb serial driver should have a pointer to the corresponding usb driver. So the usb serial core can add a new id not only to the usb serial driver, but also to the usb driver. Also the usb drivers of ark3116, mos7720 and mos7840 missed the flag no_dynamic_id=1. This is added now. Signed-off-by: Johannes Hölzl <johannes.hoelzl@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-01usb: navman kill urb cleanupMariusz Kozlowski
- usb_kill_urb() cleanup Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-10-05IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-07-12[PATCH] USB: move usb-serial.h to include/linux/usb/Greg Kroah-Hartman
USB serial outside of the kernel tree can not build properly due to usb-serial.h being buried down in the source tree. This patch moves the location of the file to include/linux/usb and fixes up all of the usb serial drivers to handle the move properly. Cc: Sergei Organov <osv@javad.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-03-20[PATCH] USB serial: add navman driverGreg Kroah-Hartman
Thanks to Warren Lewis <wlewis@scn.org> for the information needed to write the driver and for testing it out. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>