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* device create: misc: convert device_create_drvdata to device_createGreg Kroah-Hartman2008-10-16
| | | | | | | | Now that device_create() has been audited, rename things back to the original call to be sane. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tty: Fallout from tty-move-canon-specialsStephen Rothwell2008-10-13
| | | | | | | | | | | | | | | | | Today's linux-next build (x86_64 allmodconfig) failed like this: /drivers/char/tty_ioctl.c: In function 'change_termios': drivers/isdn/capi/capi.c:1234: error: implicit declaration of function 'n_tty_ioctl' drivers/isdn/gigaset/ser-gigaset.c: In function 'gigaset_tty_ioctl': drivers/isdn/gigaset/ser-gigaset.c:648: error: implicit declaration of function 'n_tty_ioctl' Introduced by commit 686b5e4aea05a80e370dc931b7f4a8d03c80da54 ("tty-move-canon-specials"). I added the following patch (which may not be correct). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/isdn/capi/kcapi.c: Adjust error handling code involving capi_ctr_putJulia Lawall2008-09-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After calling capi_ctr_get, error handling code should call capi_ctr_put. The semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r@ expression x,E; statement S; position p1,p2,p3; @@ ( if ((x = capi_ctr_get@p1(...)) == NULL || ...) S | x = capi_ctr_get@p1(...) ... when != x if (x == NULL || ...) S ) <... if@p3 (...) { ... when != capi_ctr_put(x) when != if (x) { ... capi_ctr_put(x); ...} return@p2 ...; } ...> ( return x; | return 0; | x = E | E = x | capi_ctr_put(x) ) @exists@ position r.p1,r.p2,r.p3; expression x; int ret != 0; statement S; @@ * x = capi_ctr_get@p1(...) <... * if@p3 (...) S ...> * return@p2 \(NULL\|ret\); // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds2008-07-22
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (79 commits) arm: bus_id -> dev_name() and dev_set_name() conversions sparc64: fix up bus_id changes in sparc core code 3c59x: handle pci_name() being const MTD: handle pci_name() being const HP iLO driver sysdev: Convert the x86 mce tolerant sysdev attribute to generic attribute sysdev: Add utility functions for simple int/ulong variable sysdev attributes sysdev: Pass the attribute to the low level sysdev show/store function driver core: Suppress sysfs warnings for device_rename(). kobject: Transmit return value of call_usermodehelper() to caller sysfs-rules.txt: reword API stability statement debugfs: Implement debugfs_remove_recursive() HOWTO: change email addresses of James in HOWTO always enable FW_LOADER unless EMBEDDED=y uio-howto.tmpl: use unique output names uio-howto.tmpl: use standard copyright/legal markings sysfs: don't call notify_change sysdev: fix debugging statements in registration code. kobject: should use kobject_put() in kset-example kobject: reorder kobject to save space on 64 bit builds ...
| * device create: isdn: convert device_create to device_create_drvdataGreg Kroah-Hartman2008-07-22
| | | | | | | | | | | | | | | | device_create() is race-prone, so use the race-free device_create_drvdata() instead as device_create() is going away. Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | tty: rework break handlingAlan Cox2008-07-22
|/ | | | | | | | | Some hardware needs to do break handling itself and may have partial support only. Make break_ctl return an error code. Add a tty driver flag so you can indicate driver hardware side break support. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: Ldisc revampAlan Cox2008-07-20
| | | | | | | | | | | | Move the line disciplines towards a conventional ->ops arrangement. For the moment the actual 'tty_ldisc' struct in the tty is kept as part of the tty struct but this can then be changed if it turns out that when it all settles down we want to refcount ldiscs separately to the tty. Pull the ldisc code out of /proc and put it with our ldisc code. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge commit 'v2.6.26' into bkl-removalJonathan Corbet2008-07-14
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| * isdn/capi: Return proper errnos on module init.Marcin Slusarz2008-05-15
| | | | | | | | | | | | | | | | | | | | cdebug_init() is called from kcapi_init() which is module initialization function, so it must return negative values on errors. Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | CAPI: BKL pushdownJonathan Corbet2008-06-20
|/ | | | | | Put explicit lock_kernel() calls into capi_open() Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* isdn: switch to int put_char methodAlan Cox2008-04-30
| | | | | | | Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* isdn: use non-racy method for proc entries creationDenis V. Lunev2008-04-29
| | | | | | | | | | | | | | Use proc_create()/proc_create_data() to make sure that ->proc_fops and ->data be setup before gluing PDE to main tree. Add correct ->owner to proc_fops to fix reading/module unloading race. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Karsten Keil <kkeil@suse.de> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* isdn: rename CONFIG_AVMB1_COMPAT to not look like a Kconfig variableRobert P. J. Day2008-04-28
| | | | | | | | | | Since CONFIG_AVMB1_COMPAT is not a Kconfig variable, move it out of the Kconfig namespace. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* capifs: fix memory leak on remountCyrill Gorcunov2008-04-28
| | | | | | | | | | capifs_remount may reach 'return' statement without freeing of memory allocated by kstrdup call Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* isdn: replace remaining __FUNCTION__ occurrencesHarvey Harrison2008-04-28
| | | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* capi: fix sparse warnings using integer as NULL pointerHarvey Harrison2008-04-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | drivers/isdn/capi/kcapi.c:829:30: warning: Using plain integer as NULL pointer drivers/isdn/capi/kcapi.c:838:27: warning: Using plain integer as NULL pointer drivers/isdn/capi/kcapi.c:954:17: warning: Using plain integer as NULL pointer drivers/isdn/capi/kcapi.c:1007:37: warning: Using plain integer as NULL pointer drivers/isdn/capi/kcapi.c:1009:33: warning: Using plain integer as NULL pointer drivers/isdn/capi/capiutil.c:453:24: warning: Using plain integer as NULL pointer drivers/isdn/capi/capilib.c:47:30: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:353:29: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:369:15: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:486:48: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:515:46: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:541:47: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:692:47: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:699:49: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:704:14: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:943:53: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:948:32: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:969:42: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:989:48: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:1026:69: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:1028:19: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:1061:20: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:1529:37: warning: Using plain integer as NULL pointer drivers/isdn/capi/capi.c:1531:33: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:338:15: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:758:32: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:880:40: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:407:15: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:429:49: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:407:15: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:444:49: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:429:49: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:429:49: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:429:49: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:429:49: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:429:49: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:1664:61: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:1969:37: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:2294:37: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:2297:33: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:2338:37: warning: Using plain integer as NULL pointer drivers/isdn/capi/capidrv.c:2341:33: warning: Using plain integer as NULL pointer drivers/isdn/capi/capifs.c:192:37: warning: Using plain integer as NULL pointer drivers/isdn/capi/capifs.c:194:33: warning: Using plain integer as NULL pointer Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Karsten Keil <kkeil@suse.de> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mount options: fix capifsMiklos Szeredi2008-02-08
| | | | | | | | | | | | Add a .show_options super operation to capifs. Use generic_show_options() and save the complete option string in capifs_remount(). Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6Linus Torvalds2008-01-25
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This can be broken down into these major areas: - Documentation updates (language translations and fixes, as well as kobject and kset documenatation updates.) - major kset/kobject/ktype rework and fixes. This cleans up the kset and kobject and ktype relationship and architecture, making sense of things now, and good documenation and samples are provided for others to use. Also the attributes for kobjects are much easier to handle now. This cleaned up a LOT of code all through the kernel, making kobjects easier to use if you want to. - struct bus_type has been reworked to now handle the lifetime rules properly, as the kobject is properly dynamic. - struct driver has also been reworked, and now the lifetime issues are resolved. - the block subsystem has been converted to use struct device now, and not "raw" kobjects. This patch has been in the -mm tree for over a year now, and finally all the issues are worked out with it. Older distros now properly work with new kernels, and no userspace updates are needed at all. - nozomi driver is added. This has also been in -mm for a long time, and many people have asked for it to go in. It is now in good enough shape to do so. - lots of class_device conversions to use struct device instead. The tree is almost all cleaned up now, only SCSI and IB is the remaining code to fix up... * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6: (196 commits) Driver core: coding style fixes Kobject: fix coding style issues in kobject c files Kobject: fix coding style issues in kobject.h Driver core: fix coding style issues in device.h spi: use class iteration api scsi: use class iteration api rtc: use class iteration api power supply : use class iteration api ieee1394: use class iteration api Driver Core: add class iteration api Driver core: Cleanup get_device_parent() in device_add() and device_move() UIO: constify function pointer tables Driver Core: constify the name passed to platform_device_register_simple driver core: fix build with SYSFS=n sysfs: make SYSFS_DEPRECATED depend on SYSFS Driver core: use LIST_HEAD instead of call to INIT_LIST_HEAD in __init kobject: add sample code for how to use ksets/ktypes/kobjects kobject: add sample code for how to use kobjects in a simple manner. kobject: update the kobject/kset documentation kobject: remove old, outdated documentation. ...
| * ISDN: Convert from class_device to device for ISDN capiTony Jones2008-01-24
| | | | | | | | | | | | | | | | Signed-off-by: Tony Jones <tonyj@suse.de> Cc: Kay Sievers <kay.sievers@vrfy.org> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | fix oops on rmmod capidrvKarsten Keil2008-01-25
|/ | | | | | | | | | | | | Fix overwriting the stack with the version string (it is currently 10 bytes + zero) when unloading the capidrv module. Safeguard against overwriting it should the version string grow in the future. Should fix Kernel Bug Tracker Bug 9696. Signed-off-by: Gerd v. Egidy <gerd.von.egidy@intra2net.com> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [ISDN] capidrv: address two longstanding warningsJeff Garzik2007-10-29
| | | | | | | | | | | * change #warning to a code comment * add comment and special ifdef'd 64-bit code for a situation where we must store a pointer into a CAPI field 'Data', which is fixed by the interface at 32 bits. Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Acked-by: Karsten Keil <kkeil@suse.de>
* isdn: guard against a potential NULL pointer dereference in ↵Jesper Juhl2007-10-16
| | | | | | | | | | | | | | | old_capi_manufacturer() In drivers/isdn/capi/kcapi.c::old_capi_manufacturer(), if the call to get_capi_ctr_by_nr(ldef.contr); in line 823 returns NULL, then we'll be dereferencing a NULL pointer in the very next line. (Found by Coverity checker as bug #402) Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fix possible NULL deref on low memory condition in capidrv.c::send_message()Jesper Juhl2007-10-16
| | | | | | | | | | | | | | | | If we fail to allocate an skb in drivers/isdn/capi/capidrv.c::send_message(), then we'll end up dereferencing a NULL pointer. Since out of memory conditions are not unheard of, I believe it is better to print a error message and just return rather than bring down the whole kernel. Sure, doing this may upset some application, but that's still better than crashing the whole system. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* isdn/capi warning fixesAndrew Morton2007-07-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | drivers/isdn/capi/capi.c: In function 'handle_minor_send': drivers/isdn/capi/capi.c:552: warning: cast from pointer to integer of different size Of course, the code here might actually be buggy, in which case this patch should not be applied? Answer: No this field is ignored inside linux kernel.Yes this is ugly, but it's the CAPI spec for all OS. CAPI DATA_B3 Request/Indication CAPI Message has a mandatory field which represent the 32 bit buffer address of the payload data. In linux the payload data do not use a sperate buffer, data follows directely after the CAPI Message in the same skb and we use this assumption inside the drivers, so we can ignore this field. Inside the linux CAPI implemetation we never use this field, so it could also have no value, but since random data in a message is bad as well (e.g. displayed in CAPI traces) we set is to the most adequate value. Outside the kernel the capi20 library sets the correct addresses (there is an optional second field for 64 bit adresses for 64 bit systems, we do not use here). Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Use menuconfig objects: ISDN: CONFIG_ISDN_CAPIJan Engelhardt2007-07-17
| | | | | | | | | Transform "depends on" into a simpler if-endif block style dependency. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Make ISDN CAPI use seq_list_xxx helpersPavel Emelianov2007-07-17
| | | | | | | | | | | The similar code exists here and is called capi_driver_get_idx(). Use generic helpers now and remember to convert list_head to struct capi_driver in .show callback. Signed-off-by: Pavel Emelianov <xemul@openvz.org> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Use mutex instead of semaphore in CAPI 2.0 driverMatthias Kaehlcke2007-07-17
| | | | | | | | | | The CAPI 2.0 driver uses a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* misc doc and kconfig typosMatt LaPlante2007-05-09
| | | | | | | Fix various typos in kernel docs and Kconfigs, 2.6.21-rc4. Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* use mutex instead of semaphore in CAPI 2.0 interfaceMatthias Kaehlcke2007-05-08
| | | | | | | | | | The CAPI 2.0 interface uses a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* make drivers/isdn/capi/capiutil.c:cdebbuf_alloc() staticAdrian Bunk2007-05-08
| | | | | | | Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* header cleaning: don't include smp_lock.h when not usedRandy Dunlap2007-05-08
| | | | | | | | | | | | Remove includes of <linux/smp_lock.h> where it is not used/needed. Suggested by Al Viro. Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc, sparc64, and arm (all 59 defconfigs). Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] Fix buffer overflow and races in capi debug functionsKarsten Keil2007-03-01
| | | | | | | | | | | | | The CAPI trace debug functions were using a fixed size buffer, which can be overflowed if wrong formatted CAPI messages were sent to the kernel capi layer. The code was also not protected against multiple callers. This fix bug 8028. Additionally the patch make the CAPI trace functions optional. Signed-off-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] remove many unneeded #includes of sched.hTim Schmielau2007-02-14
| | | | | | | | | | | | | | | | | | | | | | | | After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] mark struct file_operations const 3Arjan van de Ven2007-02-12
| | | | | | | | | | | Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] Workaround CAPI subsystem locking issueMichael Buesch2007-02-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | I think the following patch should go into the kernel, until the ISDN/CAPI guys create the real fix for this issue. The issue is a concurrency issue with some internal CAPI data structure which can crash the kernel. On my FritzCard DSL with the AVM driver it crashes about once a day without this workaround patch. With this workaround patch it's rock-stable (at least on UP, but I don't see why this shouldn't work on SMP as well. But maybe I'm missing something.) This workaround is kind of a sledgehammer which inserts a global lock to wrap around all the critical sections. Of course, this is a scalability issue, if you have many ISDN/CAPI cards. But it prevents a crash. So I vote for this fix to get merged, until people come up with a better solution. Better have a stable kernel that's less scalable, than a crashing and useless kernel. This bug is in the kernel since 2.6.15 (at least). Signed-off-by: Michael Buesch <mb@bu3sch.de> Cc: Kai Germaschewski <kai.germaschewski@gmx.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] isdn/capi: use ARRAY_SIZE when appropriateAhmed S. Darwish2007-02-12
| | | | | | | Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] getting rid of all casts of k[cmz]alloc() callsRobert P. J. Day2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Run this: #!/bin/sh for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do echo "De-casting $f..." perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f done And then go through and reinstate those cases where code is casting pointers to non-pointers. And then drop a few hunks which conflicted with outstanding work. Cc: Russell King <rmk@arm.linux.org.uk>, Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Greg KH <greg@kroah.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Paul Fulghum <paulkf@microgate.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Karsten Keil <kkeil@suse.de> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Ian Kent <raven@themaw.net> Cc: Steven French <sfrench@us.ibm.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Neil Brown <neilb@cse.unsw.edu.au> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] isdn: replace kmalloc+memset with kzallocBurman Yan2006-12-08
| | | | | | Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] tty: switch to ktermiosAlan Cox2006-12-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the grungy swap all the occurrences in the right places patch that goes with the updates. At this point we have the same functionality as before (except that sgttyb() returns speeds not zero) and are ready to begin turning new stuff on providing nobody reports lots of bugs If you are a tty driver author converting an out of tree driver the only impact should be termios->ktermios name changes for the speed/property setting functions from your upper layers. If you are implementing your own TCGETS function before then your driver was broken already and its about to get a whole lot more painful for you so please fix it 8) Also fill in c_ispeed/ospeed on init for most devices, although the current code will do this for you anyway but I'd like eventually to lose that extra paranoia [akpm@osdl.org: bluetooth fix] [mp3@de.ibm.com: sclp fix] [mp3@de.ibm.com: warning fix for tty3270] [hugh@veritas.com: fix tty_ioctl powerpc build] [jdike@addtoit.com: uml: fix ->set_termios declaration] Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Martin Peschke <mp3@de.ibm.com> Acked-by: Peter Oberparleiter <oberpar@de.ibm.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] struct path: convert isdnJosef Sipek2006-12-08
| | | | | | Signed-off-by: Josef Sipek <jsipek@fsl.cs.sunysb.edu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* WorkStruct: make allyesconfigDavid Howells2006-11-22
| | | | | | Fix up for make allyesconfig. Signed-Off-By: David Howells <dhowells@redhat.com>
* [PATCH] ISDN: check for userspace copy faultsJeff Garzik2006-10-17
| | | | | | | | | | Most of the ISDN ->readstat() implementations needed to check copy_to_user() and put_user() return values. Signed-off-by: Jeff Garzik <jeff@garzik.org> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] const struct tty_operationsJeff Dike2006-10-02
| | | | | | | | | | | | | | | | | | | | | | | As part of an SMP cleanliness pass over UML, I consted a bunch of structures in order to not have to document their locking. One of these structures was a struct tty_operations. In order to const it in UML without introducing compiler complaints, the declaration of tty_set_operations needs to be changed, and then all of its callers need to be fixed. This patch declares all struct tty_operations in the tree as const. In all cases, they are static and used only as input to tty_set_operations. As an extra check, I ran an i386 allyesconfig build which produced no extra warnings. 53 drivers are affected. I checked the history of a bunch of them, and in most cases, there have been only a handful of maintenance changes in the last six months. serial_core.c was the busiest one that I looked at. Signed-off-by: Jeff Dike <jdike@addtoit.com> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] inode-diet: Eliminate i_blksize from the inode structureTheodore Ts'o2006-09-27
| | | | | | | | | | | | | | | | This eliminates the i_blksize field from struct inode. Filesystems that want to provide a per-inode st_blksize can do so by providing their own getattr routine instead of using the generic_fillattr() function. Note that some filesystems were providing pretty much random (and incorrect) values for i_blksize. [bunk@stusta.de: cleanup] [akpm@osdl.org: generic_fillattr() fix] Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-30
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [PATCH] devfs: Remove the tty_driver devfs_name field as it's no longer neededGreg Kroah-Hartman2006-06-26
| | | | | | Also fixes all drivers that set this field. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] devfs: Remove the devfs_fs_kernel.h file from the treeGreg Kroah-Hartman2006-06-26
| | | | | | Also fixes up all files that #include it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] devfs: Remove devfs_remove() function from the kernel treeGreg Kroah-Hartman2006-06-26
| | | | | | Removes the devfs_remove() function and all callers of it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] devfs: Remove devfs_mk_cdev() function from the kernel treeGreg Kroah-Hartman2006-06-26
| | | | | | Removes the devfs_mk_cdev() function and all callers of it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] CAPI crash / race conditionMichael Buesch2006-06-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I am getting more or less reproducible crashes from the CAPI subsystem using the fcdsl driver: Unable to handle kernel NULL pointer dereference at virtual address 00000010 printing eip: c39bbca4 *pde = 00000000 Oops: 0000 [#1] Modules linked in: netconsole capi capifs 3c59x mii fcdsl kernelcapi uhci_hcd usbcore ide_cd cdrom CPU: 0 EIP: 0060:[<c39bbca4>] Tainted: P VLI EFLAGS: 00010202 (2.6.16.11 #3) EIP is at handle_minor_send+0x17a/0x241 [capi] eax: c24abbc0 ebx: c0b4c980 ecx: 00000010 edx: 00000010 esi: c1679140 edi: c2783016 ebp: 0000c28d esp: c0327e24 ds: 007b es: 007b ss: 0068 Process swapper (pid: 0, threadinfo=c0326000 task=c02e1300) Stack: <0>000005b4 c1679180 00000000 c28d0000 c1ce04e0 c2f69654 c221604e c1679140 c39bc19a 00000038 c20c0400 c075c560 c1f2f800 00000000 c01dc9b5 c1e96a40 c075c560 c2ed64c0 c1e96a40 c01dcd3b c2fb94e8 c075c560 c0327f00 c1e96a40 Call Trace: [<c39bc19a>] capinc_tty_write+0xda/0xf3 [capi] [<c01dc9b5>] ppp_sync_push+0x52/0xfe [<c01dcd3b>] ppp_sync_send+0x1f5/0x204 [<c01d9bc1>] ppp_push+0x3e/0x9c [<c01dacd4>] ppp_xmit_process+0x422/0x4cc [<c01daf3f>] ppp_start_xmit+0x1c1/0x1f6 [<c0213ea5>] qdisc_restart+0xa7/0x135 [<c020b112>] dev_queue_xmit+0xba/0x19e [<c0223f69>] ip_output+0x1eb/0x236 [<c0220907>] ip_forward+0x1c1/0x21a [<c021fa6c>] ip_rcv+0x38e/0x3ea [<c020b4c2>] netif_receive_skb+0x166/0x195 [<c020b55e>] process_backlog+0x6d/0xd2 [<c020a30f>] net_rx_action+0x6a/0xff [<c0112909>] __do_softirq+0x35/0x7d [<c0112973>] do_softirq+0x22/0x26 [<c0103a9d>] do_IRQ+0x1e/0x25 [<c010255a>] common_interrupt+0x1a/0x20 [<c01013c5>] default_idle+0x2b/0x53 [<c0101426>] cpu_idle+0x39/0x4e [<c0328386>] start_kernel+0x20b/0x20d Code: c0 e8 b3 b6 77 fc 85 c0 75 10 68 d8 c8 9b c3 e8 82 3d 75 fc 8b 43 60 5a eb 50 8d 56 50 c7 00 00 00 00 00 66 89 68 04 eb 02 89 ca <8b> 0a 85 c9 75 f8 89 02 89 da ff 46 54 8b 46 10 e8 30 79 fd ff <0>Kernel panic - not syncing: Fatal exception in interrupt That oops took me to the "ackqueue" implementation in capi.c. The crash occured in capincci_add_ack() (auto-inlined by the compiler). I read the code a bit and finally decided to replace the custom linked list implementation (struct capiminor->ackqueue) by a struct list_head. That did not solve the crash, but produced the following interresting oops: Unable to handle kernel paging request at virtual address 00200200 printing eip: c39bb1f5 *pde = 00000000 Oops: 0002 [#1] Modules linked in: netconsole capi capifs 3c59x mii fcdsl kernelcapi uhci_hcd usbcore ide_cd cdrom CPU: 0 EIP: 0060:[<c39bb1f5>] Tainted: P VLI EFLAGS: 00010246 (2.6.16.11 #3) EIP is at capiminor_del_ack+0x18/0x49 [capi] eax: 00200200 ebx: c18d41a0 ecx: c1385620 edx: 00100100 esi: 0000d147 edi: 00001103 ebp: 0000d147 esp: c1093f3c ds: 007b es: 007b ss: 0068 Process events/0 (pid: 3, threadinfo=c1092000 task=c1089030) Stack: <0>c2a17580 c18d41a0 c39bbd16 00000038 c18d41e0 00000000 d147c640 c29e0b68 c29e0b90 00000212 c29e0b68 c39932b2 c29e0bb0 c10736a0 c0119ef0 c399326c c10736a8 c10736a0 c10736b0 c0119f93 c011a06e 00000001 00000000 00000000 Call Trace: [<c39bbd16>] handle_minor_send+0x1af/0x241 [capi] [<c39932b2>] recv_handler+0x46/0x5f [kernelcapi] [<c0119ef0>] run_workqueue+0x5e/0x8d [<c399326c>] recv_handler+0x0/0x5f [kernelcapi] [<c0119f93>] worker_thread+0x0/0x10b [<c011a06e>] worker_thread+0xdb/0x10b [<c010c998>] default_wake_function+0x0/0xc [<c011c399>] kthread+0x90/0xbc [<c011c309>] kthread+0x0/0xbc [<c0100a65>] kernel_thread_helper+0x5/0xb Code: 7e 02 89 ee 89 f0 5a f7 d0 c1 f8 1f 5b 21 f0 5e 5f 5d c3 56 53 8b 48 50 89 d6 89 c3 8b 11 eb 2f 66 39 71 08 75 25 8b 41 04 8b 11 <89> 10 89 42 04 c7 01 00 01 10 00 89 c8 c7 41 04 00 02 20 00 e8 The interresting part of it is the "virtual address 00200200", which is LIST_POISON2. I thought about some race condition, but as this is an UP system, it leads to questions on how it can happen. If we look at EFLAGS: 00010202, we see that interrupts are enabled at the time of the crash (eflags & 0x200). Finally, I don't understand all the capi code, but I think that handle_minor_send() is racing somehow against capi_recv_message(), which call both capiminor_del_ack(). So if an IRQ occurs in the middle of capiminor_del_ack() and another instance of it is invoked, it leads to linked list corruption. I came up with the following patch. With this, I could not reproduce the crash anymore. Clearly, this is not the correct fix for the issue. As this seems to be some locking issue, there might be more locking issues in that code. For example, doesn't the whole struct capiminor have to be locked somehow? Cc: Carsten Paeth <calle@calle.de> Cc: Kai Germaschewski <kai.germaschewski@gmx.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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