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* Merge branch 'core-debug-for-linus' of ↵Linus Torvalds2009-09-11
|\ | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: debug lockups: Improve lockup detection, fix generic arch fallback debug lockups: Improve lockup detection
| * debug lockups: Improve lockup detection, fix generic arch fallbackIngo Molnar2009-08-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As Andrew noted, my previous patch ("debug lockups: Improve lockup detection") broke/removed SysRq-L support from architecture that do not provide a __trigger_all_cpu_backtrace implementation. Restore a fallback path and clean up the SysRq-L machinery a bit: - Rename the arch method to arch_trigger_all_cpu_backtrace() - Simplify the define - Document the method a bit - in the hope of more architectures adding support for it. [ The patch touches Sparc code for the rename. ] Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: "David S. Miller" <davem@davemloft.net> LKML-Reference: <20090802140809.7ec4bb6b.akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * debug lockups: Improve lockup detectionIngo Molnar2009-08-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When debugging a recent lockup bug i found various deficiencies in how our current lockup detection helpers work: - SysRq-L is not very efficient as it uses a workqueue, hence it cannot punch through hard lockups and cannot see through most soft lockups either. - The SysRq-L code depends on the NMI watchdog - which is off by default. - We dont print backtraces from the RCU code's built-in 'RCU state machine is stuck' debug code. This debug code tends to be one of the first (and only) mechanisms that show that a lockup has occured. This patch changes the code so taht we: - Trigger the NMI backtrace code from SysRq-L instead of using a workqueue (which cannot punch through hard lockups) - Trigger print-all-CPU-backtraces from the RCU lockup detection code Also decouple the backtrace printing code from the NMI watchdog: - Dont use variable size cpumasks (it might not be initialized and they are a bit more fragile anyway) - Trigger an NMI immediately via an IPI, instead of waiting for the NMI tick to occur. This is a lot faster and can produce more relevant backtraces. It will also work if the NMI watchdog is disabled. - Dont print the 'dazed and confused' message when we print a backtrace from the NMI - Do a show_regs() plus a dump_stack() to get maximum info out of the dump. Worst-case we get two stacktraces - which is not a big deal. Sometimes, if register content is corrupted, the precise stack walker in show_regs() wont give us a full backtrace - in this case dump_stack() will do it. Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds2009-09-11
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (102 commits) crypto: sha-s390 - Fix warnings in import function crypto: vmac - New hash algorithm for intel_txt support crypto: api - Do not displace newly registered algorithms crypto: ansi_cprng - Fix module initialization crypto: xcbc - Fix alignment calculation of xcbc_tfm_ctx crypto: fips - Depend on ansi_cprng crypto: blkcipher - Do not use eseqiv on stream ciphers crypto: ctr - Use chainiv on raw counter mode Revert crypto: fips - Select CPRNG crypto: rng - Fix typo crypto: talitos - add support for 36 bit addressing crypto: talitos - align locks on cache lines crypto: talitos - simplify hmac data size calculation crypto: mv_cesa - Add support for Orion5X crypto engine crypto: cryptd - Add support to access underlaying shash crypto: gcm - Use GHASH digest algorithm crypto: ghash - Add GHASH digest algorithm for GCM crypto: authenc - Convert to ahash crypto: api - Fix aligned ctx helper crypto: hmac - Prehash ipad/opad ...
| * | crypto: talitos - add support for 36 bit addressingKim Phillips2009-08-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | Enabling extended addressing in the h/w requires we always assign the extended address component (eptr) of the talitos h/w pointer. This is for e500 based platforms with large memories. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | crypto: talitos - align locks on cache linesKim Phillips2009-08-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | align channel access locks onto separate cache lines (for performance reasons). This is done by placing per-channel variables into their own private struct, and using the cacheline_aligned attribute within that struct. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | crypto: talitos - simplify hmac data size calculationKim Phillips2009-08-12
| | | | | | | | | | | | | | | | | | | | | | | | don't do request->src vs. assoc pointer math - it's the same as adding assoclen and ivsize (just with more effort). Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | crypto: mv_cesa - Add support for Orion5X crypto engineSebastian Andrzej Siewior2009-08-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds support for Marvell's Cryptographic Engines and Security Accelerator (CESA) which can be found on a few SoC. Tested with dm-crypt. Acked-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | crypto: padlock - Fix hashing of partial blocksHerbert Xu2009-07-15
| | | | | | | | | | | | | | | | | | | | | | | | When we encounter partial blocks in finup, we'll invoke the xsha instruction with a bogus count that is not a multiple of the block size. This patch fixes it. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | crypto: padlock - Fix compile error on i386Herbert Xu2009-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The previous change to allow hashing from states other than the initial broke compilation on i386 because the inline assembly tried to squeeze a u64 into a 32-bit register. As we've already checked for 32-bit overflows we can simply truncate it to u32, or unsigned long so that we don't truncate at all on x86-64. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | crypto: crypto4xx - Disable SHA implementationHerbert Xu2009-07-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The crypto4xx SHA implementation keeps the hash state in the tfm data structure. This breaks a fundamental requirement of ahash implementations that they must be reentrant. This patch disables the broken implementation. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | crypto: crypto4xx - Switch to new style ahashHerbert Xu2009-07-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes crypto4xx to use the new style ahash type. In particular, we now use ahash_alg to define ahash algorithms instead of crypto_alg. This is achieved by introducing a union that encapsulates the new type and the existing crypto_alg structure. They're told apart through a u32 field containing the type value. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | crypto: crypto4xx - Use crypto_ahash_set_reqsizeHerbert Xu2009-07-14
| | | | | | | | | | | | | | | | | | | | | This patch makes crypto4xx use crypto_ahash_set_reqsize to avoid accessing crypto_ahash directly. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | crypto: padlock - Switch sha to shashHerbert Xu2009-07-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch converts the padlock-sha implementation to shash. In doing so the existing mechanism of storing the data until final is no longer viable as we do not have a way of allocating data in crypto_shash_init and then reliably freeing it. This is just as well because a better way of handling the problem is to hash everything but the last chunk using normal sha code and then provide the intermediate result to the padlock device. This is good enough because the primary application of padlock-sha is IPsec and there the data is laid out in the form of an hmac header followed by the rest of the packet. In essence we can provide all the data to the padlock as the hmac header only needs to be hashed once. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | crypto: padlock - Use shash fallback for shaHerbert Xu2009-07-11
| | | | | | | | | | | | | | | | | | This patch changes padlock sha fallback to shash instead of hash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | hwrng: Use PCI_VDEVICEJoe Perches2009-06-25
| | | | | | | | | | | | | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * | random: Add optional continuous repetition test to entropy store based rngsNeil Horman2009-06-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | FIPS-140 requires that all random number generators implement continuous self tests in which each extracted block of data is compared against the last block for repetition. The ansi_cprng implements such a test, but it would be nice if the hw rng's did the same thing. Obviously its not something thats always needed, but it seems like it would be a nice feature to have on occasion. I've written the below patch which allows individual entropy stores to be flagged as desiring a continuous test to be run on them as is extracted. By default this option is off, but is enabled in the event that fips mode is selected during bootup. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | | Merge branch 'writeback' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2009-09-11
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'writeback' of git://git.kernel.dk/linux-2.6-block: writeback: check for registered bdi in flusher add and inode dirty writeback: add name to backing_dev_info writeback: add some debug inode list counters to bdi stats writeback: get rid of pdflush completely writeback: switch to per-bdi threads for flushing data writeback: move dirty inodes from super_block to backing_dev_info writeback: get rid of generic_sync_sb_inodes() export
| * | | writeback: add name to backing_dev_infoJens Axboe2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This enables us to track who does what and print info. Its main use is catching dirty inodes on the default_backing_dev_info, so we can fix that up. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | | writeback: get rid of generic_sync_sb_inodes() exportJens Axboe2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds two new exported functions: - writeback_inodes_sb(), which only attempts to writeback dirty inodes on this super_block, for WB_SYNC_NONE writeout. - sync_inodes_sb(), which writes out all dirty inodes on this super_block and also waits for the IO to complete. Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | | | Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds2009-09-11
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (54 commits) [S390] tape: Use pr_xxx instead of dev_xxx in shared driver code [S390] Wire up page fault events for software perf counters. [S390] Remove smp_cpu_not_running. [S390] Get rid of cpuid.h header file. [S390] Limit cpu detection to 256 physical cpus. [S390] tape: Fix device online messages [S390] Enable guest page hinting by default. [S390] use generic scatterlist.h [S390] s390dbf: Add description for usage of "%s" in sprintf events [S390] Initialize __LC_THREAD_INFO early. [S390] fix recursive locking on page_table_lock [S390] kvm: use console_initcall() to initialize s390 virtio console [S390] tape: reversed order of labels [S390] hypfs: Use "%u" instead of "%d" for unsigned ints in snprintf [S390] kernel: Print an error message if kernel NSS cannot be defined [S390] zcrypt: Free ap_device if dev_set_name fails. [S390] zcrypt: Use spin_lock_bh in suspend callback [S390] xpram: Remove checksum validation for suspend/resume [S390] vmur: Invalid allocation sequence for vmur class [S390] hypfs: remove useless variable qname ...
| * | | | [S390] tape: Use pr_xxx instead of dev_xxx in shared driver codeMichael Holzheu2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For messages from the tape core that is shared between the 3590 and 34xx tape disciplines, we want to have the "tape" prefix instead of "tape_3590" or "tape_34xx". In order to fix this, we now use the pr_xxx printk macros. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] Get rid of cpuid.h header file.Heiko Carstens2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge cpuid.h header file into cpu.h. While at it convert from typedef to struct declaration and also convert cio code to use proper lowcore structure instead of casts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] tape: Fix device online messagesMichael Holzheu2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, when a tape device is set online and no cartridge is loaded, we get the messages "The tape cartridge has been successfully unloaded" and "Determining the size of the recorded area". These messages are not correct. To fix this, we now print the "cartridge loaded/unloaded" messages only, when the load/unload event really occurs. In addition to that, the message "Determining the size of the recorded area" is only printed, if a cartridge is loaded. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] kvm: use console_initcall() to initialize s390 virtio consoleHendrik Brueckner2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use a console_initcall() to initialize the s390 virtio console and clean up s390 console initialization in setup.c. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] tape: reversed order of labelsRoel Kluin2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the order of goto labels in tape_generic_online. Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
| * | | | [S390] zcrypt: Free ap_device if dev_set_name fails.Felix Beck2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If dev_set_name fails during scanning the AP bus, the reserved memory has to be freed. Signed-off-by: Felix Beck <felix.beck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] zcrypt: Use spin_lock_bh in suspend callbackFelix Beck2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix lock dependency warning. inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. bash/1442 [HC0[0]:SC0[0]:HE1:SE1] takes: (&ap_dev->lock){+.?...}, at: [<000003e001280404>] __ap_poll_device+0x40/0x3e8 [ap] {IN-SOFTIRQ-W} state was registered at: [<000000000017f094>] __lock_acquire+0xb78/0x182c [<000000000017fe8e>] lock_acquire+0x146/0x178 [<0000000000549cf2>] _spin_lock+0x5a/0x98 [<000003e001280404>] __ap_poll_device+0x40/0x3e8 [ap] [<000003e001280afe>] ap_poll_all+0xaa/0x1a4 [ap] [<000000000014fa82>] tasklet_action+0xfe/0x1f4 [<0000000000150a56>] __do_softirq+0x116/0x284 [<0000000000111058>] do_softirq+0xe4/0xe8 [<00000000001504ba>] irq_exit+0xba/0xd8 [<00000000003dd04a>] do_IRQ+0x176/0x1fc [<000000000011823c>] io_return+0x0/0x8 [<0000004bfbfd2c0e>] 0x4bfbfd2c0e Signed-off-by: Felix Beck <felix.beck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] xpram: Remove checksum validation for suspend/resumeMichael Holzheu2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently in the suspend process checksums for the XPRAM partitions are created and stored. During the resume process it is checked, if the checksums are still the same. If this is not the case, a kernel panic is triggered. Unfortunately this prevents XPRAM from beeing used as suspend device, because in this case after the checksum has been created, the memory image is written to XPRAM and therefore the contents of the suspend partition is changed. In order to allow XPRAM to be used as suspend device, this patch removes the checksum validation. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] vmur: Invalid allocation sequence for vmur classMichael Holzheu2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The vmur class is allocated after the CCW driver is registered and it is destroyed before the CCW driver is unregistered. This is not the correct sequence, because the vmur class can be used via driver core callbacks that are triggered during the CCW driver deregistration. For Example: 1. vmur device is online 2. vmur module is unloaded This leads to the following function call stack: <4> [<0000000000387286>] device_destroy+0x36/0x5c <4> [<000003e000209714>] ur_set_offline_force+0x9c/0x10c [vmur] <4> [<000003e00020a928>] ur_remove+0x64/0xbc [vmur] <4> [<00000000003e4d2e>] ccw_device_remove+0x42/0x1ac <4> [<000000000038a1aa>] __device_release_driver+0x9a/0xe4 <4> [<000000000038a2da>] driver_detach+0xe6/0xec <4> [<0000000000388ee4>] bus_remove_driver+0xc0/0x108 <4> [<000003e00020ad5a>] ur_exit+0x52/0x84 [vmur] In device_destroy() the vmur class is used. Since it is already freed, this can lead to a kernel panic. To fix the problem, the vmur class has to be allocated before the CCW driver is registered and destroyed after the CCW driver has ben unregistered. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] add call home supportHans-Joachim Picht2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Hans-Joachim Picht <hans@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] tape: use init_timer_on_stack() rather than init_timer()Frank Munzert2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With CONFIG_DEBUG_OBJECTS_TIMERS=y "chccwdev --online" for a tape device will fail with message "ODEBUG: object is on stack, but not annotated". We now use init_timer_on_stack. Signed-off-by: Frank Munzert <munzert@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] proper use of device registerSebastian Ott2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't use kfree directly after device registration started. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] dasd: fix message namingStefan Haberland2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes message naming so that generic dasd messages do not contain the device discipline. For this purpose the dev_ makros are replaced by pr_ makros for generic dasd messages. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] dasd: optimize cpu usage in goodcaseStefan Haberland2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | remove unnecessary dbf call, remove string operations for magic Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] dasd: fail requests when device state is less then readyStefan Weinhuber2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A DASD device that is not ready or online has no defined disk layout, so all requests that arrive in such a state need to be returned as failed. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: remove ccw_device init_nameSebastian Ott2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We used the init_name to set the console ccw_device's name early at the boot stage. This patch moves the name setting (for all ccw devices) to the point where we actually register the device. At this time we can do dynamic allocations and therefore use dev_set_name. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: move final put_device to ccw_device_unregisterSebastian Ott2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We use a test_and_clear_bit to prevent a device from being unregistered twice. Unfortunately in this cases the "final" put_device (from device_initialize) was issued more than once, resulting in an use after free error. Fix this by moving this put_device to ccw_device_unregister. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: remove subchannel init_nameSebastian Ott2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We used the init_name to set the console subchannels name early at the boot stage. With the patch cio: fix memleak in subchannel validation we moved the name setting to the point where we actually register the console subchannel. At this time we can do dynamic allocations and therefore use dev_set_name. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: fix memleak in subchannel validationSebastian Ott2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When scanning for new subchannels we have a code path where we allocate memory for a struct subchannel, set the device name (which is dynamically allocated now) and do a check if the underlying device is blacklisted - if so we free the subchannel structure. Since we have not set up refcounting at this stage, the device name's memory is lost. Fix this by moving the dev_set_name after the blacklist test. Note: With this patch the init_name for the console subchannel becomes virtually obsolete. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: fix use after free in s390 debug featureSebastian Ott2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When using s390dbf with "%s" in sprintf format strings the string itself is not copied to the dbf buffer. Since in this case only pointers are stored in the s390dbf, we should not use dev_name - which is bound to the lifetime of the device. Reading this entry from s390dbf after the device was released will cause an use after free error. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] qdio: remove limited number of debugfs entriesJan Glauber2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The number of qdio debugfs entries was limited. Remove this limit and group the queue files in a per device directory. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: failing set online/offline processing.Michael Ernst2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When unit checks trigger sensing the device state is set to W4SENSE until sense completion; then the device state is set back to ONLINE. If a unit check occurs while set online or set offline requests are processed then it might happen that the device's temporary W4SENSE state causes these functions to terminate, leaving the device in an inconsistent state when the state is set back to ONLINE later on so that the device cannot be set online or offline any longer. To solve this, set online/offline and related rollback or error routines are processed only if the device is in a final or DISCONNECTED state. Signed-off-by: Michael Ernst <mernst@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: ensure to hold a reference for deferred deregistrationSebastian Ott2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure to always hold an extra device reference for scheduling a subchannel deregistration, by moving the get_device to ccw_device_schedule_sch_unregister. This fixes an use after free error in ccw_device_call_sch_unregister where put_device was called on an already freed device structure. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] qdio: continue polling if the queue is not finishedJan Glauber2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With commit c38f96080955854e54df9cb392bc674e1ae330e1 polling was stopped for the queue even if new data is available. Return immediately after scheduling the queue tasklet if the queue is not done. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: increase trace levelSebastian Ott2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move debug traces for start I/O and interrupt events to exclusive trace levels. Also change tracing in hot-path from sprintf (costly) to hex. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: fix not oper handling after failed [on|off]line processingSebastian Ott2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If online/offline processing of a ccw device fails, resulting in not operational state, notify the driver and unregister the device in case the driver dosn't want to keep it. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: consolidate subchannel intparm resetPeter Oberparleiter2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure that the hardware interruption parameter for a subchannel is reset when the associated subchannel data structure is freed. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: move scsw helper functions to header fileHeiko Carstens2009-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All scsw helper functions are very short and usage of them shouldn't result in function calls. Therefore we move them to a separate header file. Also saves a lot of EXPORT_SYMBOLs. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | [S390] cio: fix ineffective verify eventPeter Oberparleiter2009-09-11
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Path verification events occurring for offline devices are currently ignored. As a result, offline devices are not removed, even though they might no longer be accessible (for example because the last path to the device was varied offline). Fix this by scheduling a status evaluation for the affected subchannel when a path verification event occurs. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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