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path: root/drivers/s390/char/sclp.c
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* s390/sclp: fix possible control register corruptionHeiko Carstens2016-01-111-3/+2
| | | | | | | | | | | | | | | | sclp_sync_wait() disables all external interrupt classes except for the service signal subclass. The static mask used for that however is wrong. It clears a couple of bits which shouldn't be cleared and on the other hand potentially does not clear bits which should be cleared. Fix this by using the same generic mask like we do it in our delay implementation. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/sclp: Change SCLP console default buffer-full behaviorPeter Oberparleiter2015-07-221-3/+3
| | | | | | | | | | | | Dropping kernel messages during a console-buffer-full condition is preferable to halting the system until console messages are delivered, especially for production systems. Update default for sclp_console_drop kernel parameter accordingly. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@linux.vnet.ibm.com> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/sclp: move sclp_facilities into "struct sclp"David Hildenbrand2015-05-131-1/+1
| | | | | | | | | Let's also move the facilities into the sclp struct, so we can avoid another separate external variable. Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: char: drop owner assignment from platform_driversWolfram Sang2014-10-201-1/+0
| | | | | | | A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* s390/sclp: replace PTR_RET with PTR_ERR_OR_ZERODuan Jiong2014-04-111-1/+1
| | | | | | | | PTR_RET is deprecated. Do not recommend its usage anymore. Use PTR_ERR_OR_ZERO instead. Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/irq: Use defines for external interruption codesThomas Huth2014-04-031-3/+3
| | | | | | | | | | | Use the new defines for external interruption codes to get rid of "magic" numbers in the s390 source code. And while we're at it, also rename the (un-)register_external_interrupt function to something shorter so that this patch does not exceed the 80 columns all over the place. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/sclp: add timeout for queued requestsGerald Schaefer2014-04-011-0/+82
| | | | | | | | | | | | | This patch adds a timeout option for queued requests and introduces sclp_sync_request_timeout() to use this timer. With this, blocking the system too long, e.g. during an SE reboot, can be avoided in critical situations like CPU and memory hotplug. Since there is no way to cancel a running request, this timeout only applies to queued requests that have not yet been started. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/time: correct use of store clock fastMartin Schwidefsky2013-10-221-2/+2
| | | | | | | | | | | | | | | | | The result of the store-clock-fast (STCKF) instruction is a bit fuzzy. It can happen that the value stored on one CPU is smaller than the value stored on another CPU, although the order of the stores is the other way around. This can cause deltas of get_tod_clock() values to become negative when they should not be. We need to be more careful with store-clock-fast, this patch partially reverts git commit e4b7b4238e666682555461fa52eecd74652f36bb "time: always use stckf instead of stck if available". The get_tod_clock() function now uses the store-clock-extended (STCKE) instruction. get_tod_clock_fast() can be used if the fuzziness of store-clock-fast is acceptable e.g. for wait loops local to a CPU. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/irq: rework irq subclass handlingHeiko Carstens2013-09-041-3/+3
| | | | | | | | | | | Let's not add a function for every external interrupt subclass for which we need reference counting. Just have two register/unregister functions which have a subclass parameter: void irq_subclass_register(enum irq_subclass subclass); void irq_subclass_unregister(enum irq_subclass subclass); Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* s390/drivers: Cocci spatch "ptr_ret.spatch"Thomas Meyer2013-06-261-1/+1
| | | | | | Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/sclp: Add SCLP character device driverMichael Holzheu2013-06-261-5/+10
| | | | | | | | Add a character misc device "sclp_ctl" that allows to run SCCBs from user space using the SCLP_CTL_SCCB ioctl. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/sclp: add parameter to specify number of buffer pagesMartin Schwidefsky2013-06-261-0/+69
| | | | | | | | | | | | | | | | Add a kernel parameter to be able to specify the number of pages to be used as output buffer by the line-mode sclp driver and the vt220 sclp driver. The current number of output pages is 6, if the service element is unavailable the boot messages alone can fill up the output buffer. If this happens the system blocks until the service element is working again. For a large LPAR with many devices it is sensible to have the ability to increase the output buffer size. To help to debug this situation add a counter for the page-pool-empty situation and make it available as a sclp driver attribute. To avoid the system to stall until the service element works again add another kernel parameter to allow to drop output buffers. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/time: rename tod clock access functionsHeiko Carstens2013-02-141-2/+2
| | | | | | | | Fix name clash with some common code device drivers and add "tod" to all tod clock access function names. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/irq: remove split irq fields from /proc/statHeiko Carstens2013-01-081-2/+2
| | | | | | | | | | | | | | | | | | | | | Now that irq sum accounting for /proc/stat's "intr" line works again we have the oddity that the sum field (first field) contains only the sum of the second (external irqs) and third field (I/O interrupts). The reason for that is that these two fields are already sums of all other fields. So if we would sum up everything we would count every interrupt twice. This is broken since the split interrupt accounting was merged two years ago: 052ff461c8427629aee887ccc27478fc7373237c "[S390] irq: have detailed statistics for interrupt types". To fix this remove the split interrupt fields from /proc/stat's "intr" line again and only have them in /proc/interrupts. This restores the old behaviour, seems to be the only sane fix and mimics a behaviour from other architectures where /proc/interrupts also contains more than /proc/stat's "intr" line does. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/sclp: use -EOPNOTSUPP instead of -ENOSYSHeiko Carstens2012-09-261-1/+1
| | | | | | | The return value was only internally used, so it's ok to change. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* KVM: s390: Perform early event mask processing during bootHeinz Graalfs2012-06-131-10/+0
| | | | | | | | | | | | For processing under KVM it is required to detect the actual SCLP console type in order to set it as preferred console. Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* [S390] irq: external interrupt code passingHeiko Carstens2012-03-111-2/+2
| | | | | | | | | | | | | | | The external interrupt handlers have a parameter called ext_int_code. Besides the name this paramter does not only contain the ext_int_code but in addition also the "cpu address" (POP) which caused the external interrupt. To make the code a bit more obvious pass a struct instead so the called function can easily distinguish between external interrupt code and cpu address. The cpu address field however is named "subcode" since some external interrupt sources do not pass a cpu address but a different parameter (or none at all). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] irq: merge irq.c and s390_ext.cHeiko Carstens2011-05-261-1/+0
| | | | | | | | Merge irq.c and s390_ext.c into irq.c. That way all external interrupt related functions are together. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] irq: fix service signal external interrupt handlingHeiko Carstens2011-05-261-3/+3
| | | | | | | | | | | | | | | | | Interrupt sources like pfault, sclp, dasd_diag and virtio all use the service signal external interrupt subclass mask in control register 0 to enable and disable the corresponding interrupt. Because no reference counting is implemented each subsystem thinks it is the only user of subclass and sets and clears the bit like it wants. This leads to case that unloading the dasd diag module under z/VM causes both sclp and pfault interrupts to be masked. The result will be locked up system sooner or later. Fix this by introducing a new way to set (register) and clear (unregister) the service signal subclass mask bit in cr0. Also convert all drivers. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: use register_external_interrupt()Heiko Carstens2011-01-051-9/+3
| | | | | | | | Use register_external_interrupt() instead of register_early_external_interrupt(). The early variant is not necessary since kmalloc works already. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] irq: have detailed statistics for interrupt typesHeiko Carstens2011-01-051-1/+5
| | | | | | | | | | | | | | | | | | | | | | Up to now /proc/interrupts only has statistics for external and i/o interrupts but doesn't split up them any further. This patch adds a line for every single interrupt source so that it is possible to easier tell what the machine is/was doing. Part of the output now looks like this; CPU0 CPU2 CPU4 EXT: 3898 4232 2305 I/O: 782 315 245 CLK: 1029 1964 727 [EXT] Clock Comparator IPI: 2868 2267 1577 [EXT] Signal Processor TMR: 0 0 0 [EXT] CPU Timer TAL: 0 0 0 [EXT] Timing Alert PFL: 0 0 0 [EXT] Pseudo Page Fault [...] NMI: 0 1 1 [NMI] Machine Checks Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cleanup lowcore access from external interruptsMartin Schwidefsky2010-10-251-7/+7
| | | | | | | Read external interrupts parameters from the lowcore in the first level interrupt handler in entry[64].S. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Fix IRQ flag handling namingDavid Howells2010-10-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the IRQ flag handling naming. In linux/irqflags.h under one configuration, it maps: local_irq_enable() -> raw_local_irq_enable() local_irq_disable() -> raw_local_irq_disable() local_irq_save() -> raw_local_irq_save() ... and under the other configuration, it maps: raw_local_irq_enable() -> local_irq_enable() raw_local_irq_disable() -> local_irq_disable() raw_local_irq_save() -> local_irq_save() ... This is quite confusing. There should be one set of names expected of the arch, and this should be wrapped to give another set of names that are expected by users of this facility. Change this to have the arch provide: flags = arch_local_save_flags() flags = arch_local_irq_save() arch_local_irq_restore(flags) arch_local_irq_disable() arch_local_irq_enable() arch_irqs_disabled_flags(flags) arch_irqs_disabled() arch_safe_halt() Then linux/irqflags.h wraps these to provide: raw_local_save_flags(flags) raw_local_irq_save(flags) raw_local_irq_restore(flags) raw_local_irq_disable() raw_local_irq_enable() raw_irqs_disabled_flags(flags) raw_irqs_disabled() raw_safe_halt() with type checking on the flags 'arguments', and then wraps those to provide: local_save_flags(flags) local_irq_save(flags) local_irq_restore(flags) local_irq_disable() local_irq_enable() irqs_disabled_flags(flags) irqs_disabled() safe_halt() with tracing included if enabled. The arch functions can now all be inline functions rather than some of them having to be macros. Signed-off-by: David Howells <dhowells@redhat.com> [X86, FRV, MN10300] Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> [Tile] Signed-off-by: Michal Simek <monstr@monstr.eu> [Microblaze] Tested-by: Catalin Marinas <catalin.marinas@arm.com> [ARM] Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> [AVR] Acked-by: Tony Luck <tony.luck@intel.com> [IA-64] Acked-by: Hirokazu Takata <takata@linux-m32r.org> [M32R] Acked-by: Greg Ungerer <gerg@uclinux.org> [M68K/M68KNOMMU] Acked-by: Ralf Baechle <ralf@linux-mips.org> [MIPS] Acked-by: Kyle McMartin <kyle@mcmartin.ca> [PA-RISC] Acked-by: Paul Mackerras <paulus@samba.org> [PowerPC] Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [S390] Acked-by: Chen Liqin <liqin.chen@sunplusct.com> [Score] Acked-by: Matt Fleming <matt@console-pimps.org> [SH] Acked-by: David S. Miller <davem@davemloft.net> [Sparc] Acked-by: Chris Zankel <chris@zankel.net> [Xtensa] Reviewed-by: Richard Henderson <rth@twiddle.net> [Alpha] Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp> [H8300] Cc: starvik@axis.com [CRIS] Cc: jesper.nilsson@axis.com [CRIS] Cc: linux-cris-kernel@axis.com
* tree-wide: Assorted spelling fixesDaniel Mack2010-02-091-1/+1
| | | | | | | | | | | In particular, several occurances of funny versions of 'success', 'unknown', 'therefore', 'acknowledge', 'argument', 'achieve', 'address', 'beginning', 'desirable', 'separate' and 'necessary' are fixed. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Joe Perches <joe@perches.com> Cc: Junio C Hamano <gitster@pobox.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* const: constify remaining dev_pm_opsAlexey Dobriyan2009-12-151-1/+1
| | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [S390] pm: power management support for SCLP drivers.Michael Holzheu2009-06-161-30/+218
| | | | | | | | | | | | | | | | | | | | | | | The SCLP base driver defines a new notifier call back for all upper level SCLP drivers, like the SCLP console, etc. This guarantees that in suspend first the upper level drivers are suspended and afterwards the SCLP base driver. For resume it is the other way round. The SCLP base driver itself registers a new platform device at the platform bus and gets PM notifications via the dev_pm_ops. In suspend, the SCLP base driver switches off the receiver and sender mask This is done in sclp_deactivate(). After suspend all new requests will be rejected with -EIO and no more interrupts will be received, because the masks are switched off. For resume the sender and receiver masks are reset in the sclp_reactivate() function. When the SCLP console is suspended, all new messages are cached in the sclp console buffers. In resume, all the cached messages are written to the console. In addition to that we have an early resume function that removes the cached messages from the suspend image. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: handle empty event buffersPeter Oberparleiter2009-02-191-1/+4
| | | | | | | | | Handle a malformed hardware response which some versions of the Support Element (SE) may present during SE restart and which otherwise would result in an endless loop in function sclp_dispatch_evbufs. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] nohz/sclp: disable timer on synchronous waits.Heiko Carstens2008-08-011-2/+4
| | | | | | | | | | | sclp_sync_wait wait synchronously for an sclp interrupt and disables timer interrupts. However on the irq enter paths there is an extra check if a timer interrupt would be due and calls the timer callback. This would schedule softirqs in the wrong context. So introduce local_tick_enable/disable which prevents this. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Remove P390 support.Heiko Carstens2008-07-141-2/+0
| | | | | | | | | Most likely it is broken anyway because of the changes in memory detection. Since we can't test it and there are probably better ways that using a P390 card, remove support for it. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Cleanup sclp printk messages.Martin Schwidefsky2008-07-141-5/+3
| | | | | Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] sclp: keep facility mask up to date.Heiko Carstens2008-07-141-0/+2
| | | | | | | | | In case the supported sclp facilities change the new mask should be saved. Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: clean up send/receive naming schemePeter Oberparleiter2008-02-191-6/+6
| | | | | | | | | Make state change events adjust the correct mask by cleaning up naming inconsistencies. Also remove chance for lockup by removing unnecessary mask related check before reading events. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Get rid of a bunch of sparse warnings again.Heiko Carstens2007-10-121-3/+2
| | | | | | | Also removes a bunch of ^L in drivers/s390/cio/cmf.c Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: fix coding style.Stefan Haberland2007-04-271-1/+1
| | | | | | | | | Use only capital letters for defines. Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: initialize early.Peter Oberparleiter2007-04-271-0/+8
| | | | | | | | | Add explicit sclp initialization for those sclp users that do not register with the interface. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Avoid excessive inlining.Heiko Carstens2007-02-051-1/+1
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Convert memory detection into C code.Heiko Carstens2007-02-051-6/+6
| | | | | | | | | | | | | | Hopefully this will make it more maintainable and less error prone. Code makes use of search_exception_tables(). Since it calls this function before the kernel exeception table is sorted, there is an early call to sort_main_extable(). This way it's easy to use the already present infrastructure of fixup sections. Also this would allows to easily convert the rest of head[31|64].S into C code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Small barrier() and cpu_relax() cleanup.Heiko Carstens2007-02-051-1/+0
| | | | | | | | | cpu_relax() has barrier() semantics hence there is no need to use both of them in conjunction in sclp_sync_wait(). Also change cpu_relax() so it's more obvious that it has barrier semantics. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: don't call local_bh_disable/_local_bh_enable if in_interrupt()Heiko Carstens2007-02-051-2/+6
| | | | | | | | | local_bh_disable/_local_bh_enable must not be called if in_irq() is true. Besides that if in_interrupt() is true bottom halves are disabled anyway. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: invalid handling of temporary 'not operational' statusPeter Oberparleiter2007-02-051-21/+49
| | | | | | | | | | | Requests are aborted when the sclp interface reports 'not operational' even though they may still be active at the sclp, leading to concurrent writes to request memory by both the kernel and the sclp interface. Do not abort requests for which the sclp interface reports not operational status during request retry. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>5A Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] irq change build fixes.Heiko Carstens2006-10-061-2/+2
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Inline assembly cleanup.Martin Schwidefsky2006-09-281-22/+9
| | | | | | | | | | | | Major cleanup of all s390 inline assemblies. They now have a common coding style. Quite a few have been shortened, mainly by using register asm variables. Use of the EX_TABLE macro helps as well. The atomic ops, bit ops and locking inlines new use the Q-constraint if a newer gcc is used. That results in slightly better code. Thanks to Christian Borntraeger for proof reading the changes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [PATCH] lockdep: irqtrace subsystem, s390 supportHeiko Carstens2006-07-031-4/+6
| | | | | | | | | | | irqtrace support for s390. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: fix sclp memory corruption in tty pages listPeter Oberparleiter2006-02-111-8/+5
| | | | | | | | | | | | | | | | | When the sclp interface takes very long to serve a request, the sclp core driver will report a failed request to the sclp tty driver even though the request is still being processed by the sclp interface. Eventually the sclp interface completes the request and updates some fields in the request buffer which leads to a corrupted tty pages list. The next time function sclp_tty_write_room is called, the corrupted list will be traversed, resulting in an oops. To avoid this remove the busy retry limit and increase retry intervals. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+915
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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