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tag: v2.6.25-rc7
Commits on Mar 26, 2008
  1. @torvalds

    Linux 2.6.25-rc7

    torvalds authored
Commits on Mar 25, 2008
  1. @torvalds

    ACPI: fix Medion _PRT quirk (use "ISA_", not "ISA")

    Bjorn Helgaas authored torvalds committed
    This fixes the builtin RTL8139 NIC on the Medion MD9580-F laptop.  The
    BIOS reports the interrupt routing incorrectly.  I recently added a
    quirk to work around this, and this patch fixes a typo in the quirk.
    
    We pad every ACPI pathname component to four characters, so ".ISA." will
    never match anything.  We need ".ISA_." instead.
    
    Thank you Johann-Nikolaus Andreae <johann-nikolaus.andreae@nacs.de>
    for patiently testing this patch.
    
    See http://bugzilla.kernel.org/show_bug.cgi?id=4773
    
    Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  2. @torvalds

    Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare…

    torvalds authored
    …-2.6
    
    * 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6:
      i2c: Fix docbook problem
      ASoC/TLV320AIC3X: Stop I2C driver ID abuse
      i2c-omap: Fix unhandled fault
      i2c-bfin-twi: Disable BF54x support for now
  3. @torvalds

    Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel…

    torvalds authored
    …/git/avi/kvm
    
    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm:
      KVM: MMU: Fix memory leak on guest demand faults
      KVM: VMX: convert init_rmode_tss() to slots_lock
      KVM: MMU: handle page removal with shadow mapping
      KVM: MMU: Fix is_rmap_pte() with io ptes
      KVM: VMX: Restore tss even on x86_64
  4. @torvalds

    Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel…

    torvalds authored
    …/git/viro/vfs-2.6
    
    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
      [PATCH] get stack footprint of pathname resolution back to relative sanity
      [PATCH] double iput() on failure exit in hugetlb
      [PATCH] double dput() on failure exit in tiny-shmem
      [PATCH] fix up new filp allocators
      [PATCH] check for null vfsmount in dentry_open()
      [PATCH] reiserfs: eliminate private use of struct file in xattr
      [PATCH] sanitize hppfs
      hppfs pass vfsmount to dentry_open()
      [PATCH] restore export of do_kern_mount()
  5. KVM: MMU: Fix memory leak on guest demand faults

    Avi Kivity authored
    While backporting 72dc67a, a gfn_to_page()
    call was duplicated instead of moved (due to an unrelated patch not being
    present in mainline).  This caused a page reference leak, resulting in a
    fairly massive memory leak.
    
    Fix by removing the extraneous gfn_to_page() call.
    
    Signed-off-by: Avi Kivity <avi@qumranet.com>
  6. KVM: VMX: convert init_rmode_tss() to slots_lock

    Marcelo Tosatti authored Avi Kivity committed
    init_rmode_tss was forgotten during the conversion from mmap_sem to
    slots_lock.
    
    INFO: task qemu-system-x86:3748 blocked for more than 120 seconds.
    Call Trace:
     [<ffffffff8053d100>] __down_read+0x86/0x9e
     [<ffffffff8053fb43>] do_page_fault+0x346/0x78e
     [<ffffffff8053d235>] trace_hardirqs_on_thunk+0x35/0x3a
     [<ffffffff8053dcad>] error_exit+0x0/0xa9
     [<ffffffff8035a7a7>] copy_user_generic_string+0x17/0x40
     [<ffffffff88099a8a>] :kvm:kvm_write_guest_page+0x3e/0x5f
     [<ffffffff880b661a>] :kvm_intel:init_rmode_tss+0xa7/0xf9
     [<ffffffff880b7d7e>] :kvm_intel:vmx_vcpu_reset+0x10/0x38a
     [<ffffffff8809b9a5>] :kvm:kvm_arch_vcpu_setup+0x20/0x53
     [<ffffffff8809a1e4>] :kvm:kvm_vm_ioctl+0xad/0x1cf
     [<ffffffff80249dea>] __lock_acquire+0x4f7/0xc28
     [<ffffffff8028fad9>] vfs_ioctl+0x21/0x6b
     [<ffffffff8028fd75>] do_vfs_ioctl+0x252/0x26b
     [<ffffffff8028fdca>] sys_ioctl+0x3c/0x5e
     [<ffffffff8020b01b>] system_call_after_swapgs+0x7b/0x80
    
    Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
    Signed-off-by: Avi Kivity <avi@qumranet.com>
  7. KVM: MMU: handle page removal with shadow mapping

    Marcelo Tosatti authored Avi Kivity committed
    Do not assume that a shadow mapping will always point to the same host
    frame number.  Fixes crash with madvise(MADV_DONTNEED).
    
    [avi: move after first printk(), add another printk()]
    
    Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
    Signed-off-by: Avi Kivity <avi@qumranet.com>
  8. KVM: MMU: Fix is_rmap_pte() with io ptes

    Avi Kivity authored
    is_rmap_pte() doesn't take into account io ptes, which have the avail bit set.
    
    Signed-off-by: Avi Kivity <avi@qumranet.com>
  9. KVM: VMX: Restore tss even on x86_64

    Avi Kivity authored
    The vmx hardware state restore restores the tss selector and base address, but
    not its length.  Usually, this does not matter since most of the tss contents
    is within the default length of 0x67.  However, if a process is using ioperm()
    to grant itself I/O port permissions, an additional bitmap within the tss,
    but outside the default length is consulted.  The effect is that the process
    will receive a SIGSEGV instead of transparently accessing the port.
    
    Fix by restoring the tss length.  Note that i386 had this working already.
    
    Closes bugzilla 10246.
    
    Signed-off-by: Avi Kivity <avi@qumranet.com>
  10. @torvalds

    Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6

    torvalds authored
    * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
      USB: Fix cut-and-paste error in rtl8150.c
      USB: ehci: stop vt6212 bus hogging
      USB: sierra: add another device id
      USB: sierra: dma fixes
      USB: add support for Motorola ROKR Z6 cellphone in mass storage mode
      USB: isd200: fix memory leak in isd200_get_inquiry_data
      USB: pl2303: another product ID
      USB: new quirk flag to avoid Set-Interface
      USB: fix gadgetfs class request delegation
  11. @torvalds

    Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6

    torvalds authored
    * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6:
      driver core: debug for bad dev_attr_show() return value.
      UIO: add pgprot_noncached() to UIO mmap code
  12. @gregkh

    PCI: revert "pcie: utilize pcie transaction pending bit"

    Andrew Morton authored gregkh committed
    Revert as it is reported to cause problems for people.
    
    commit 4348a2d
    Author: Shaohua Li <shaohua.li@intel.com>
    Date:   Wed Oct 24 10:45:08 2007 +0800
    
        pcie: utilize pcie transaction pending bit
    
        PCIE has a mechanism to wait for Non-Posted request to complete. I think
        pci_disable_device is a good place to do this.
    
        Signed-off-by: Shaohua Li <shaohua.li@intel.com>
        Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
    
    Due to the regression reported at
    http://bugzilla.kernel.org/show_bug.cgi?id=10065
    
    Cc: Shaohua Li <shaohua.li@intel.com>
    Cc: Soeren Sonnenburg <kernel@nn7.de>
    Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  13. @gregkh

    PCI: iova: lockdep false alarm fix

    Mark Gross authored gregkh committed
    lockdep goes off on the iova copy_reserved_iova() because it and a function
    it calls grabs locks in the from, and the to of the copy operation.
    
    The function grab locks of the same lock classes triggering the warning.  The
    first lock grabbed is for the constant reserved areas that is never accessed
    after early boot.  Technically you could do without grabbing the locks for the
    "from" structure its copying reserved areas from.
    
    But dropping the from locks to me looks wrong, even though it would be ok.
    
    The affected code only runs in early boot as its setting up the DMAR
    engines.
    
    This patch gives the reserved_ioval_list locks special lockdep classes.
    
    Signed-off-by: Mark Gross <mgross@linux.intel.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  14. @gregkh

    driver core: debug for bad dev_attr_show() return value.

    Andrew Morton authored gregkh committed
    Try to find the culprit who caused
    http://bugzilla.kernel.org/show_bug.cgi?id=10150
    
    Cc: <balajirrao@gmail.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  15. @gregkh

    UIO: add pgprot_noncached() to UIO mmap code

    Jean-Samuel Chenard authored gregkh committed
    Mapping of physical memory in UIO needs pgprot_noncached() to ensure
    that IO memory is not cached. Without pgprot_noncached(), it (accidentally)
    works on x86 and arm, but fails on PPC.
    
    Signed-off-by: Jean-Samuel Chenard <jsamch@gmail.com>
    Signed-off-by: Hans J Koch <hjk@linutronix.de>
    Cc: stable <stable@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  16. @rpjday @gregkh

    USB: Fix cut-and-paste error in rtl8150.c

    rpjday authored gregkh committed
    Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  17. @gregkh

    USB: ehci: stop vt6212 bus hogging

    Rene Herman authored gregkh committed
    The VIA VT6212 defaults to only waiting 1us between passes over EHCI's
    async ring, which hammers PCI badly ... and by preventing other devices
    from accessing the bus, causes problems like drops in IDE throughput,
    a problem that's been bugging users of those chips for several years.
    
    A (partial) datasheet for this chip eventually turned up, letting us
    see how to make it use a VIA-specific register to switch over to the
    the normal 10us value instead, as suggested by the EHCI specification
    Solution noted by Lev A. Melnikovsky.
    
    It's not clear whether this register exists on other VIA chips; we
    know that it's ineffective on the vt8235.  So this patch only applies
    to chips that seem to be incarnations of the (discrete) vt6212.
    
    Signed-off-by: Rene Herman <rene.herman@gmail.com>
    Tested-by: Lev A. Melnikovsky <melnikovsky@mail.ru>
    Tested-by: Alessandro Suardi <alessandro.suardi@gmail.com>
    Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  18. @gregkh

    USB: sierra: add another device id

    Kevin Lloyd authored gregkh committed
    Add support for the MC8775 device to the sierra driver.
    
    Signed-off-by: Kevin Lloyd <klloyd@sierrawireless.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  19. @gregkh

    USB: sierra: dma fixes

    Oliver Neukum authored gregkh committed
    while I was adding autosuspend to that driver I noticed a few issues.
    You were having DMAed buffers as a part of a structure.
    This will fail on platforms that are not DMA-coherent (arm, sparc, ppc, ...)
    Please test this patch to fix it.
    
    Signed-off-by: Kevin Lloyd <klloyd@sierrawireless.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  20. @gregkh

    USB: add support for Motorola ROKR Z6 cellphone in mass storage mode

    Constantin Baranov authored gregkh committed
    Motorola ROKR Z6 cellphone has bugs in its USB, so it is impossible to use
    it as mass storage. Patch describes new "unusual" USB device for it with
    FIX_INQUIRY and FIX_CAPACITY flags and new BULK_IGNORE_TAG flag.
    Last flag relaxes check for equality of bcs->Tag and us->tag in
    usb_stor_Bulk_transport routine.
    
    Signed-off-by: Constantin Baranov <const@tltsu.ru>
    Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
    Signed-off-by: Daniel Drake <dsd@gentoo.org>
    Cc: stable <stable@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  21. @bharrosh @gregkh

    USB: isd200: fix memory leak in isd200_get_inquiry_data

    bharrosh authored gregkh committed
    If the inquiry fails then the info structure on us->extra was not freed.
    
    Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
    Acked-by: Alan Stern <stern@rowland.harvard.edu>
    Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  22. @max-arnold @gregkh

    USB: pl2303: another product ID

    max-arnold authored gregkh committed
    Device like this http://aldiga.com/english/A-100-USB-EDGE10.htm
    contains Prolific 2303 chip.
    Actually their site a bit outdated - I have AlDiga AL-11U
    GSM/GPRS/EDGE modem and it works with pl2303 module after adding
    corresponding product ID.
    
    By default modem uses baud rate 460800.  GSM chipset - SIMCom SIM600,
    quad band 850/900/1800/1900 MHz
    
    Device info:
    
    T:  Bus=04 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  5 Spd=12  MxCh= 0
    D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
    P:  Vendor=067b ProdID=0611 Rev= 0.00
    C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=500mA
    I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=pl2303
    E:  Ad=81(I) Atr=03(Int.) MxPS=  10 Ivl=1ms
    E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
    E:  Ad=83(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
    
    From: Max Arnold <lwarxx@gmail.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  23. @gregkh

    USB: new quirk flag to avoid Set-Interface

    Alan Stern authored gregkh committed
    This patch (as1057) fixes a problem with the X-Rite/Gretag-Macbeth
    Eye-One Pro display colorimeter; the device crashes when it receives a
    Set-Interface request.  A new quirk (USB_QUIRK_NO_SET_INTF) is
    introduced and a quirks entry is created for this device.
    
    Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
    Cc: stable <stable@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  24. @gregkh

    USB: fix gadgetfs class request delegation

    Roy Hashimoto authored gregkh committed
    gadgetfs (drivers/usb/gadget/inode.c) was not delegating all
    non-device requests to userspace.  This patch makes the handling of
    all request cases consistent.
    
    Signed-off-by: Roy Hashimoto <hashimot@alumni.caltech.edu>
    Acked-by: David Brownell <dbrownell@users.sourceforge.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  25. @torvalds

    Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git…

    torvalds authored
    …/paulus/powerpc
    
    * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
      [POWERPC] mpc5200: Fix incorrect compatible string for the mdio node
      [POWERPC] Update some defconfigs
  26. @torvalds

    Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/k…

    torvalds authored
    …ernel/git/jgarzik/libata-dev
    
    * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
      [libata] ahci: SB600 workaround is suspect... play it safe for now
      sata_promise: fix hardreset hotplug events, take 2
      libata: improve HPA error handling
      libata: assume no device is attached if both IDENTIFYs are aborted
      pata_it821x: use raw nbytes in check_atapi_dma
      libata: implement ata_qc_raw_nbytes()
  27. [libata] ahci: SB600 workaround is suspect... play it safe for now

    Jeff Garzik authored
    At least one report claims that a878539
    failed to solve lockups, whereas the old limit-to-32-bit trick worked.
    
    Restore the 32-bit limit, but also leave the 255-sector limit in place,
    because we know that's needed as well.
    
    Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
  28. @torvalds

    Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-linus

    torvalds authored
    * git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-linus:
      kbuild: soften modpost checks when doing cross builds
  29. @paulusmack
  30. sata_promise: fix hardreset hotplug events, take 2

    Mikael Pettersson authored Jeff Garzik committed
    A Promise SATA controller will signal hotplug events when a hard
    reset (COMRESET) is done on a port. These events aren't masked by
    the driver, and the unexpected interrupts will cause a sequence
    of failed reset attempts util libata's EH finally gives up.
    
    This has not been a common problem so far, but the pending libata
    hardreset-by-default changes makes it a critical issue.
    
    The solution is to disable hotplug events before a reset, and to
    reenable them afterwards. (Promise's driver does this too.)
    
    This patch adds SATA-specific versions of ->freeze() and ->thaw()
    that also disable and enable hotplug events. PATA ports continue
    to use the old versions of ->freeze() and ->thaw().
    
    Accesses to the hotplug register must be serialised via host->lock.
    We rely on ap->lock == &ap->host->lock and that libata takes this
    lock before ->freeze() and ->thaw(). Document this requirement.
    The interrupt handler is adjusted so its hotplug register accesses
    are inside the region protected by host->lock.
    
    Tested on various chips (SATA300TX4, SATA300TX2plus, SATAII150TX4,
    FastTrack TX4000) with various combinations of SATA and PATA disks,
    with and without the pending hardreset-by-default changes.
    
    Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
    Acked-by: Tejun Heo <htejun@gmail.com>
    Signed-off-by: Jeff Garzik <jeff@garzik.org>
  31. @torvalds

    Make printk() console semaphore accesses sensible

    torvalds authored
    The printk() logic on when/how to get the console semaphore was
    unreadable, this splits the code up into a few helper functions and
    makes it easier to follow what is going on.
    
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  32. @xemul @torvalds

    bsd_acct: using task_struct->tgid is not right in pid-namespaces

    xemul authored torvalds committed
    In case we're accounting from a sub-namespace, the tgids reported will not
    refer to the right namespace.
    
    Save the pid_namespace we're accounting in on the acct_glbs and use it in
    do_acct_process.
    
    Two less :) places using the task_struct.tgid member.
    
    Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
    Cc: Oleg Nesterov <oleg@tv-sign.ru>
    Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  33. @xemul @torvalds

    bsd_acct: plain current->real_parent access is not always safe

    xemul authored torvalds committed
    This is minor, but dereferencing even current real_parent is not safe on debug
    kernels, since the memory, this points to, can be unmapped - RCU protection is
    required.
    
    Besides, the tgid field is deprecated and is to be replaced with task_tgid_xxx
    call (the 2nd patch), so RCU will be required anyway.
    
    Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
    Cc: Oleg Nesterov <oleg@tv-sign.ru>
    Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  34. @torvalds

    revert "kswapd should only wait on IO if there is IO"

    Andrew Morton authored torvalds committed
    Revert commit f1a9ee7:
    
      Author: Rik van Riel <riel@redhat.com>
      Date:   Thu Feb 7 00:14:08 2008 -0800
    
        kswapd should only wait on IO if there is IO
    
        The current kswapd (and try_to_free_pages) code has an oddity where the
        code will wait on IO, even if there is no IO in flight.  This problem is
        notable especially when the system scans through many unfreeable pages,
        causing unnecessary stalls in the VM.
    
        Additionally, tasks without __GFP_FS or __GFP_IO in the direct reclaim path
        will sleep if a significant number of pages are encountered that should be
        written out.  This gives kswapd a chance to write out those pages, while
        the direct reclaim task sleeps.
    
        Signed-off-by: Rik van Riel <riel@redhat.com>
        Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
        Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
    
    Because of large latencies and interactivity problems reported by Carlos,
    here: http://lkml.org/lkml/2008/3/22/211
    
    Cc: Rik van Riel <riel@redhat.com>
    Cc: "Carlos R.  Mafra" <crmafra2@gmail.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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