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2008-04-29IB/ehca: Allocate event queue size depending on max number of CQs and QPsStefan Roscher
If a lot of QPs fall into Error state at once and the EQ of the respective HCA is too small, it might overrun, causing the eHCA driver to stop processing completion events and calling the application's completion handlers, effectively causing traffic to stop. Fix this by limiting available QPs and CQs to a customizable max count, and determining EQ size based on these counts and a worst-case assumption. Signed-off-by: Stefan Roscher <stefan.roscher@de.ibm.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-29IPoIB: Use separate CQ for UD send completionsEli Cohen
Use a dedicated CQ for UD send completions. Also, do not arm the UD send CQ, which reduces the number of interrupts generated. This patch farther reduces overhead by not calling poll CQ for every posted send WR -- it does polls only when there 16 or more outstanding work requests. Signed-off-by: Eli Cohen <eli@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-29IB/iser: Count FMR alignment violations per sessionEli Dorfman
Count FMR alignment violations per session as part of the iscsi statistics. Signed-off-by: Eli Dorfman <elid@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-29IB/iser: Move high-volume debug output to higher debug levelEli Dorfman
Add another level for debug. Signed-off-by: Eli Dorfman <elid@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-29IB/ehca: handle negative return value from ibmebus_request_irq() properlyHoang-Nam Nguyen
ehca_create_eq() was assigning a signed return value to an unsiged local variable and then checking if the variable was < 0, which meant that errors were always ignored. Fix this by using one variable for signed integer return values and another for u64 hcall return values. Bug originally found by Roel Kluin <12o3l@tiscali.nl>. Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-29RDMA/cxgb3: Support peer-2-peer connection setupSteve Wise
Open MPI, Intel MPI and other applications don't respect the iWARP requirement that the client (active) side of the connection send the first RDMA message. This class of application connection setup is called peer-to-peer. Typically once the connection is setup, _both_ sides want to send data. This patch enables supporting peer-to-peer over the chelsio RNIC by enforcing this iWARP requirement in the driver itself as part of RDMA connection setup. Connection setup is extended, when the peer2peer module option is 1, such that the MPA initiator will send a 0B Read (the RTR) just after connection setup. The MPA responder will suspend SQ processing until the RTR message is received and reply-to. In the longer term, this will be handled in a standardized way by enhancing the MPA negotiation so peers can indicate whether they want/need the RTR and what type of RTR (0B read, 0B write, or 0B send) should be sent. This will be done by standardizing a few bits of the private data in order to negotiate all this. However this patch enables peer-to-peer applications now and allows most of the required firmware and driver changes to be done and tested now. Design: - Add a module option, peer2peer, to enable this mode. - New firmware support for peer-to-peer mode: - a new bit in the rdma_init WR to tell it to do peer-2-peer and what form of RTR message to send or expect. - process _all_ preposted recvs before moving the connection into rdma mode. - passive side: defer completing the rdma_init WR until all pre-posted recvs are processed. Suspend SQ processing until the RTR is received. - active side: expect and process the 0B read WR on offload TX queue. Defer completing the rdma_init WR until all pre-posted recvs are processed. Suspend SQ processing until the 0B read WR is processed from the offload TX queue. - If peer2peer is set, driver posts 0B read request on offload TX queue just after posting the rdma_init WR to the offload TX queue. - Add CQ poll logic to ignore unsolicitied read responses. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-29RDMA/cxgb3: Set the max_mr_size device attribute correctlySteve Wise
cxgb3 only supports 4GB memory regions. The lustre RDMA code uses this attribute and currently has to code around our bad setting. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-29RDMA/cxgb3: Correctly serialize peer abort pathSteve Wise
Open MPI and other stress testing exposed a few bad bugs in handling aborts in the middle of a normal close. Fix these by: - serializing abort reply and peer abort processing with disconnect processing - warning (and ignoring) if ep timer is stopped when it wasn't running - cleaning up disconnect path to correctly deal with aborting and dead endpoints - in iwch_modify_qp(), taking a ref on the ep before releasing the qp lock if iwch_ep_disconnect() will be called. The ref is dropped after calling disconnect. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-29mlx4_core: Add a way to set the "collapsed" CQ flagYevgeny Petrilin
Extend the mlx4_cq_resize() API with a way to set the "collapsed" flag for the CQ being created. Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-29drivers/net/tehuti: use proper capability check for raw IO accessLinus Torvalds
Yeah, in practice they both mean "root", but Alan correctly points out that anybody who gets to do raw IO space accesses should really be using CAP_SYS_RAWIO rather than CAP_NET_ADMIN. Pointed-out-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29Merge branch 'audit.b50' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current * 'audit.b50' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current: [PATCH] new predicate - AUDIT_FILETYPE [patch 2/2] Use find_task_by_vpid in audit code [patch 1/2] audit: let userspace fully control TTY input auditing [PATCH 2/2] audit: fix sparse shadowed variable warnings [PATCH 1/2] audit: move extern declarations to audit.h Audit: MAINTAINERS update Audit: increase the maximum length of the key field Audit: standardize string audit interfaces Audit: stop deadlock from signals under load Audit: save audit_backlog_limit audit messages in case auditd comes back Audit: collect sessionid in netlink messages Audit: end printk with newline
2008-04-29drivers/pcmcia/pcmcia_ioctl.c: fix buildakpm@linux-foundation.org
argh. A hunk got lost from "proc: remove proc_bus" Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29dm: use unlocked variants of queue flag check/setJens Axboe
dm.c already provides mutual exclusion through ->map_lock. Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (21 commits) pciehp: fix error message about getting hotplug control pci/irq: let pci_device_shutdown to call pci_msi_shutdown v2 pci/irq: restore mask_bits in msi shutdown -v3 doc: replace yet another dev with pdev for consistency in DMA-mapping.txt PCI: don't expose struct pci_vpd to userspace doc: fix an incorrect suggestion to pass NULL for PCI like buses Consistently use pdev as the variable of type struct pci_dev *. pciehp: Fix command write shpchp: fix slot name make pciehp_acpi_get_hp_hw_control_from_firmware() pciehp: Clean up pcie_init() pciehp: Mask hotplug interrupt at controller release pciehp: Remove useless hotplug interrupt enabling pciehp: Fix wrong slot capability check pciehp: Fix wrong slot control register access pciehp: Add missing memory barrier pciehp: Fix interrupt event handlig pciehp: fix slot name Update MAINTAINERS with location of PCI tree PCI: Add Intel SCH PCI IDs ...
2008-04-29pciehp: fix error message about getting hotplug controlKenji Kaneshige
People are confused by the following error message that actually is not for indicating a error. Cannot get control of hotplug hardware for pci %s This patch changes this message to debug message. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@hobbes.lan>
2008-04-29pci/irq: let pci_device_shutdown to call pci_msi_shutdown v2Yinghai Lu
[PATCH 2/2] pci/irq: let pci_device_shutdown to call pci_msi_shutdown v2 this change | commit 23a274c8a5adafc74a66f16988776fc7dd6f6e51 | Author: Prakash, Sathya <sathya.prakash@lsi.com> | Date: Fri Mar 7 15:53:21 2008 +0530 | | [SCSI] mpt fusion: Enable MSI by default for SAS controllers | | This patch modifies the driver to enable MSI by default for all SAS chips. | | Signed-off-by: Sathya Prakash <sathya.prakash@lsi.com> | Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> | Causes the kexec of a RHEL 5.1 kernel to fail. root casue: the rhel 5.1 kernel still uses INTx emulation. and mptscsih_shutdown doesn't call pci_disable_msi to reenable INTx on kexec path So call pci_msi_shutdown in the shutdown path to do the same thing to msix Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Jesse Barnes <jbarnes@hobbes.lan>
2008-04-29pci/irq: restore mask_bits in msi shutdown -v3Yinghai Lu
[PATCH 1/2] pci/irq: restore mask_bits in msi shutdown -v3 Yinghai found that kexec'ing a RHEL 5.1 kernel with 2.6.25-rc3+ kernels prevents his NIC from working. He bisected to | commit 89d694b9dbe769ca1004e01db0ca43964806a611 | Author: Thomas Gleixner <tglx@linutronix.de> | Date: Mon Feb 18 18:25:17 2008 +0100 | | genirq: do not leave interupts enabled on free_irq | | The default_disable() function was changed in commit: | | 76d2160147f43f982dfe881404cfde9fd0a9da21 | genirq: do not mask interrupts by default | For MSI, default_shutdown will call mask_bit for msi device. All mask bits will left disabled after free_irq. Then in the kexec case, the next kernel can only use msi_enable bit, so all device's MSI can not be used. So lets to restore the mask bit to its pci reset defined value (enabled) when we disable the kernels use of msi to be a little friendlier to kexec'd kernels. Extend msi_set_mask_bit to msi_set_mask_bits to take mask, so we can fully restore that to 0x00 instead of 0xfe. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Jesse Barnes <jbarnes@hobbes.lan>
2008-04-29Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: Fix bug - Implement bfin ata interrupt handler to avoid "irq 68 nobody cared" (v2) sata_mv: Improve naming of main_irq cause/mask identifiers libata-scsi: improve rbuf handling for simulated commands libata-scsi: clean up inquiry / mode sense related functions [MIPS] ATA: Rename routerboard 500 to 532
2008-04-29Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-bigbox-pci * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-bigbox-pci: x86: add pci=check_enable_amd_mmconf and dmi check x86: work around io allocation overlap of HT links acpi: get boot_cpu_id as early for k8_scan_nodes x86_64: don't need set default res if only have one root bus x86: double check the multi root bus with fam10h mmconf x86: multi pci root bus with different io resource range, on 64-bit x86: use bus conf in NB conf fun1 to get bus range on, on 64-bit x86: get mp_bus_to_node early x86 pci: remove checking type for mmconfig probe x86: remove unneeded check in mmconf reject driver core: try parent numa_node at first before using default x86: seperate mmconf for fam10h out from setup_64.c x86: if acpi=off, force setting the mmconf for fam10h x86_64: check MSR to get MMCONFIG for AMD Family 10h x86_64: check and enable MMCONFIG for AMD Family 10h x86_64: set cfg_size for AMD Family 10h in case MMCONFIG x86: mmconf enable mcfg early x86: clear pci_mmcfg_virt when mmcfg get rejected x86: validate against acpi motherboard resources Fixed up fairly trivial conflicts in arch/x86/pci/{init.c,pci.h} due to OLPC support manually.
2008-04-29Merge branch 'master' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [RAPIDIO] Change RapidIO doorbell source and target ID field to 16-bit [RAPIDIO] Add RapidIO connection info print out and re-training for broken connections [RAPIDIO] Add serial RapidIO controller support, which includes MPC8548, MPC8641 [RAPIDIO] Add RapidIO node probing into MPC86xx_HPCN board id table [RAPIDIO] Add RapidIO node into MPC8641HPCN dts file [RAPIDIO] Auto-probe the RapidIO system size [RAPIDIO] Add OF-tree support to RapidIO controller driver [RAPIDIO] Add RapidIO multi mport support [RAPIDIO] Move include/asm-ppc/rio.h to asm-powerpc [RAPIDIO] Add RapidIO option to kernel configuration [RAPIDIO] Change RIO function mpc85xx_ to fsl_ [POWERPC] Provide walk_memory_resource() for powerpc [POWERPC] Update lmb data structures for hotplug memory add/remove [POWERPC] Hotplug memory remove notifications for powerpc [POWERPC] windfarm: Add PowerMac 12,1 support [POWERPC] Fix building of pmac32 when CONFIG_NVRAM=m [POWERPC] Add IRQSTACKS support on ppc32 [POWERPC] Use __always_inline for xchg* and cmpxchg* [POWERPC] Add fast little-endian switch system call
2008-04-29Merge git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreqLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] state info wrong after resume [CPUFREQ] allow use of the powersave governor as the default one [CPUFREQ] document the currently undocumented parts of the sysfs interface [CPUFREQ] expose cpufreq coordination requirements regardless of coordination mechanism
2008-04-29Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: block: Skip I/O merges when disabled block: add large command support block: replace sizeof(rq->cmd) with BLK_MAX_CDB ide: use blk_rq_init() to initialize the request block: use blk_rq_init() to initialize the request block: rename and export rq_init() block: no need to initialize rq->cmd with blk_get_request block: no need to initialize rq->cmd in prepare_flush_fn hook block/blk-barrier.c:blk_ordered_cur_seq() mustn't be inline block/elevator.c:elv_rq_merge_ok() mustn't be inline block: make queue flags non-atomic block: add dma alignment and padding support to blk_rq_map_kern unexport blk_max_pfn ps3disk: Remove superfluous cast block: make rq_init() do a full memset() relay: fix splice problem
2008-04-29video: use get/put_unaligned_* helpersHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Petr Vandrovec <vandrove@vc.cvut.cz> Cc: Antonino Daplas <adaplas@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29usb: use get/put_unaligned_* helpersHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29pcmcia: use get/put_unaligned_* helpersHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Daniel Ritz <daniel.ritz@gmx.ch> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29wireless: use get/put_unaligned_* helpersHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: John W. Linville <linville@tuxdriver.com> Cc: Michael Buesch <mb@bu3sch.de> Cc: Daniel Drake <dsd@gentoo.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29net: use get/put_unaligned_* helpersHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Jeff Garzik <jeff@garzik.org> Cc: Auke Kok <auke-jan.h.kok@intel.com> Cc: John Ronciak <john.ronciak@intel.com> Cc: Jesse Brandeburg <jesse.brandeburg@intel.com> Cc: Grant Grundler <grundler@parisc-linux.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29mmc: use get/put_unaligned_* helpersHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Tony Jones <tonyj@suse.de> Cc: Pierre Ossman <drzeus@drzeus.cx> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29input: use get_unaligned_* helpersHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Dmitry Torokhov <dtor@mail.ru> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29char: use get_unaligned_* helpersHarvey Harrison
Remove unnecessary temp variable from_buf in snsc_event.c Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Jiri Slaby <jirislaby@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29hid-core: use get_unaligned_* helpersHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Acked-by: Jiri Kosina <jkosina@suse.cz> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29drivers/block: use get_unaligned_* helpersHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Ed L. Cashin <ecashin@coraid.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29tpm: change Kconfig dependencies from PNPACPI to PNPBjorn Helgaas
There is no "PNPACPI" driver interface as such. PNPACPI is an internal backend of PNP, and drivers just use the generic PNP interface. The drivers should depend on CONFIG_PNP, not CONFIG_PNPACPI. tpm_nsc.c doesn't use PNP at all, so we can just remove the dependency completely. It probably *should* use PNP to discover the device, but until it does, there's no point in depending on PNP. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Kylene Jo Hall <kjhall@us.ibm.com> Cc: Marcel Selhorst <tpm@selhorst.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29tpm: fix section mismatch warningSam Ravnborg
Fix following warning: WARNING: vmlinux.o(.init.text+0x32804): Section mismatch in reference from the function init_nsc() to the function .devexit.text:tpm_nsc_remove() The function tpm_nsc_remove() are used outside __exit, so remove the __exit annotation to make sure the function is always avilable. Note: Trying to compare this module with other users of platform_device gve me the impression that this driver needs some work to match other users. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Kylene Hall <kjhall@us.ibm.com> Cc: Marcel Selhorst <tpm@selhorst.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29parport_pc: wrap PNP probe code in #ifdef CONFIG_PNPBjorn Helgaas
Wrap PNP probe code in #ifdef CONFIG_PNP. We already do the same for CONFIG_PCI. Without this change, we'll have unresolved references to pnp_get_resource() function when CONFIG_PNP=n. (This is a new interface that's not in mainline yet.) Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29edac: fix module initialization on several modules 2nd timeHitoshi Mitake
I implemented opstate_init() as a inline function in linux/edac.h. added calling opstate_init() to: i82443bxgx_edac.c i82860_edac.c i82875p_edac.c i82975x_edac.c I wrote a fixed patch of edac-fix-module-initialization-on-several-modules.patch, and tested building 2.6.25-rc7 with applying this. It was succeed. I think the patch is now correct. Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Hitoshi Mitake <h.mitake@gmail.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29edac: remove unneeded functions and add static accessorAdrian Bunk
Collection of patches, merged into one, from Adrian that do the following: 1) This patch makes the following needlessly global functions static: - edac_pci_get_log_pe() - edac_pci_get_log_npe() - edac_pci_get_panic_on_pe() - edac_pci_unregister_sysfs_instance_kobj() - edac_pci_main_kobj_setup() 2) Remove unneeded function edac_device_find() 3) Added #if 0 around function edac_pci_find() 4) make the needlessly global edac_pci_generic_check() static 5) Removed function edac_check_mc_devices() Doug Thompson modified Adrian's patches, to bettern represent the direction of EDAC, and make them one patch. Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29edac: use the shorter LIST_HEAD for brevityRobert P. J. Day
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Acked-by: Doug Thompson <norsk5@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29edac: add e752x parameter for sysbus_parity selectionPeter Tyser
Add a module parameter "sysbus_parity" to allow forcing system bus parity error checking on or off. Also add support to automatically disable system bus parity errors for processors which do not support it. If the sysbus_parity parameter is specified, sysbus parity detection will be forced on or off. If it is not specified, the driver will attempt to look at the CPU identifier string and determine if the CPU supports system bus parity. A blacklist was used instead of a whitelist so that system bus parity would be enabled by default and to minimize the chances of breaking things for those people already using the driver which for some reason have a processor that does not have a valid CPU identifier string. [akpm@linux-foundation.org: coding-style fixes] Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Peter Tyser <ptyser@xes-inc.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29edac: new support for Intel 3100 chipsetAndrei Konovalov
Add Intel 3100 chipset support to e752x EDAC driver. Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrei Konovalov <akonovalov@ru.mvista.com> Signed-off-by: Doug Thompson <dougthompson@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29Remove duplicated unlikely() in IS_ERR()Hirofumi Nakagawa
Some drivers have duplicated unlikely() macros. IS_ERR() already has unlikely() in itself. This patch cleans up such pointless code. Signed-off-by: Hirofumi Nakagawa <hnakagawa@miraclelinux.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Jeff Garzik <jeff@garzik.org> Cc: Paul Clements <paul.clements@steeleye.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Cc: Anton Altaparmakov <aia21@cantab.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Carsten Otte <cotte@de.ibm.com> Cc: Patrick McHardy <kaber@trash.net> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.de> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29random: add async notification support to /dev/randomJeff Dike
Add async notification support to /dev/random. A little test case is below. Without this patch, you get: $ ./async-random Drained the pool Found more randomness With it, you get: $ ./async-random Drained the pool SIGIO Found more randomness #include <stdio.h> #include <stdlib.h> #include <signal.h> #include <errno.h> #include <fcntl.h> static void handler(int sig) { printf("SIGIO\n"); } int main(int argc, char **argv) { int fd, n, err, flags; if(signal(SIGIO, handler) < 0){ perror("setting SIGIO handler"); exit(1); } fd = open("/dev/random", O_RDONLY); if(fd < 0){ perror("open"); exit(1); } flags = fcntl(fd, F_GETFL); if (flags < 0){ perror("getting flags"); exit(1); } flags |= O_NONBLOCK; if (fcntl(fd, F_SETFL, flags) < 0){ perror("setting flags"); exit(1); } while((err = read(fd, &n, sizeof(n))) > 0) ; if(err == 0){ printf("random returned 0\n"); exit(1); } else if(errno != EAGAIN){ perror("read"); exit(1); } flags |= O_ASYNC; if (fcntl(fd, F_SETFL, flags) < 0){ perror("setting flags"); exit(1); } if (fcntl(fd, F_SETOWN, getpid()) < 0) { perror("Setting SIGIO"); exit(1); } printf("Drained the pool\n"); read(fd, &n, sizeof(n)); printf("Found more randomness\n"); return(0); } Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29random: simplify and rename credit_entropy_storeMatt Mackall
- emphasize bits in the name - make zero bits lock-free - simplify logic Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29random: make mixing interface byte-orientedMatt Mackall
Switch add_entropy_words to a byte-oriented interface, eliminating numerous casts and byte/word size rounding issues. This also reduces the overall bit/byte/word confusion in this code. We now mix a byte at a time into the word-based pool. This takes four times as many iterations, but should be negligible compared to hashing overhead. This also increases our pool churn, which adds some depth against some theoretical failure modes. The function name is changed to emphasize pool mixing and deemphasize entropy (the samples mixed in may not contain any). extract is added to the core function to make it clear that it extracts from the pool. Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29random: simplify add_ptr logicMatt Mackall
The add_ptr variable wasn't used in a sensible way, use only i instead. i got reused later for a different purpose, use j instead. While we're here, put tap0 first in the tap list and add a comment. Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29random: remove some prefetch logicMatt Mackall
The urandom output pool (ie the fast path) fits in one cacheline, so this is pretty unnecessary. Further, the output path has already fetched the entire pool to hash it before calling in here. (This was the only user of prefetch_range in the kernel, and it passed in words rather than bytes!) Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29random: eliminate redundant new_rotate variableMatt Mackall
- eliminate new_rotate - move input_rotate masking - simplify input_rotate update - move input_rotate update to end of inner loop for readability Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29random: remove cacheline alignment for locksMatt Mackall
Earlier changes greatly reduce the number of times we grab the lock per output byte, so we shouldn't need this particular hack any more. Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29random: make backtracking attacks harderMatt Mackall
At each extraction, we change (poolbits / 16) + 32 bits in the pool, or 96 bits in the case of the secondary pools. Thus, a brute-force backtracking attack on the pool state is less difficult than breaking the hash. In certain cases, this difficulty may be is reduced to 2^64 iterations. Instead, hash the entire pool in one go, then feedback the whole hash (160 bits) in one go. This will make backtracking at least as hard as inverting the hash. Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29random: improve variable naming, clear extract bufferMatt Mackall
- split the SHA variables apart into hash and workspace - rename data to extract - wipe extract and workspace after hashing Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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