1. 13 3月, 2009 1 次提交
    • A
      PCI: Add PCI quirk to disable L0s ASPM state for 82575 and 82598 · 649426ef
      Alexander Duyck 提交于
      This patch is intended to disable L0s ASPM link state for 82598 (ixgbe)
      parts due to the fact that it is possible to corrupt TX data when coming
      back out of L0s on some systems.  The workaround had been added for 82575
      (igb) previously, but did not use the ASPM api.  This quirk uses the ASPM
      api to prevent the ASPM subsystem from re-enabling the L0s state.
      
      Instead of adding the fix in igb to the ixgbe driver as well it was
      decided to move it into a pci quirk.  It is necessary to move the fix out
      of the driver and into a pci quirk in order to prevent the issue from
      occuring prior to driver load to handle the possibility of the device being
      passed to a VM via direct assignment.
      Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
      Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
      CC: Jesse Barnes <jbarnes@virtuousgeek.org>
      Signed-off-by: NMatthew Wilcox <willy@linux.intel.com>
      649426ef
  2. 11 3月, 2009 18 次提交
  3. 10 3月, 2009 10 次提交
  4. 09 3月, 2009 11 次提交
    • C
      Btrfs: fix spinlock assertions on UP systems · b9447ef8
      Chris Mason 提交于
      btrfs_tree_locked was being used to make sure a given extent_buffer was
      properly locked in a few places.  But, it wasn't correct for UP compiled
      kernels.
      
      This switches it to using assert_spin_locked instead, and renames it to
      btrfs_assert_tree_locked to better reflect how it was really being used.
      Signed-off-by: NChris Mason <chris.mason@oracle.com>
      b9447ef8
    • H
      Fix fixpoint divide exception in acct_update_integrals · 6d5b5acc
      Heiko Carstens 提交于
      Frans Pop reported the crash below when running an s390 kernel under Hercules:
      
        Kernel BUG at 000738b4  verbose debug info unavailable!
        fixpoint divide exception: 0009  #1! SMP
        Modules linked in: nfs lockd nfs_acl sunrpc ctcm fsm tape_34xx
           cu3088 tape ccwgroup tape_class ext3 jbd mbcache dm_mirror dm_log dm_snapshot
           dm_mod dasd_eckd_mod dasd_mod
        CPU: 0 Not tainted 2.6.27.19 #13
        Process awk (pid: 2069, task: 0f9ed9b8, ksp: 0f4f7d18)
        Krnl PSW : 070c1000 800738b4 (acct_update_integrals+0x4c/0x118)
                   R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:1 PM:0
        Krnl GPRS: 00000000 000007d0 7fffffff fffff830
                   00000000 ffffffff 00000002 0f9ed9b8
                   00000000 00008ca0 00000000 0f9ed9b8
                   0f9edda4 8007386e 0f4f7ec8 0f4f7e98
        Krnl Code: 800738aa: a71807d0         lhi     %r1,2000
                   800738ae: 8c200001         srdl    %r2,1
                   800738b2: 1d21             dr      %r2,%r1
                  >800738b4: 5810d10e         l       %r1,270(%r13)
                   800738b8: 1823             lr      %r2,%r3
                   800738ba: 4130f060         la      %r3,96(%r15)
                   800738be: 0de1             basr    %r14,%r1
                   800738c0: 5800f060         l       %r0,96(%r15)
        Call Trace:
        ( <000000000004fdea>! blocking_notifier_call_chain+0x1e/0x2c)
          <0000000000038502>! do_exit+0x106/0x7c0
          <0000000000038c36>! do_group_exit+0x7a/0xb4
          <0000000000038c8e>! SyS_exit_group+0x1e/0x30
          <0000000000021c28>! sysc_do_restart+0x12/0x16
          <0000000077e7e924>! 0x77e7e924
      
      Reason for this is that cpu time accounting usually only happens from
      interrupt context, but acct_update_integrals gets also called from
      process context with interrupts enabled.
      
      So in acct_update_integrals we may end up with the following scenario:
      
      Between reading tsk->stime/tsk->utime and tsk->acct_timexpd an interrupt
      happens which updates accouting values.  This causes acct_timexpd to be
      greater than the former stime + utime.  The subsequent calculation of
      
      	dtime = cputime_sub(time, tsk->acct_timexpd);
      
      will be negative and the division performed by
      
      	cputime_to_jiffies(dtime)
      
      will generate an exception since the result won't fit into a 32 bit
      register.
      
      In order to fix this just always disable interrupts while accessing any
      of the accounting values.
      
      Reported by: Frans Pop <elendil@planet.nl>
      Tested by: Frans Pop <elendil@planet.nl>
      Cc: stable@kernel.org
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      6d5b5acc
    • R
      lguest: fix for CONFIG_SPARSE_IRQ=y · 6db6a5f3
      Rusty Russell 提交于
      Impact: remove lots of lguest boot WARN_ON() when CONFIG_SPARSE_IRQ=y
      
      We now need to call irq_to_desc_alloc_cpu() before
      set_irq_chip_and_handler_name(), but we can't do that from init_IRQ (no
      kmalloc available).
      
      So do it as we use interrupts instead.  Also means we only alloc for
      irqs we use, which was the intent of CONFIG_SPARSE_IRQ anyway.
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      Cc: Ingo Molnar <mingo@redhat.com>
      6db6a5f3
    • R
      lguest: fix crash 'unhandled trap 13 at <native_read_msr_safe>' · cbd88c8e
      Rusty Russell 提交于
      Impact: fix lguest boot crash on modern Intel machines
      
      The code in early_init_intel does:
      
      	if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) {
      		u64 misc_enable;
      
      		rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
      
      And that rdmsr faults (not allowed from non-0 PL).  We can get around
      this by mugging the family ID part of the cpuid.  5 seems like a good
      number.
      
      Of course, this is a hack (how very lguest!).  We could just indicate
      that we don't support MSRs, or implement lguest_rdmst.
      Reported-by: NPatrick McHardy <kaber@trash.net>
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      Tested-by: NPatrick McHardy <kaber@trash.net>
      cbd88c8e
    • S
      x86 mmiotrace: fix remove_kmmio_fault_pages() · d0fc63f7
      Stuart Bennett 提交于
      Impact: fix race+crash in mmiotrace
      
      The list manipulation in remove_kmmio_fault_pages() was broken. If more
      than one consecutive kmmio_fault_page was re-added during the grace
      period between unregister_kmmio_probe() and remove_kmmio_fault_pages(),
      the list manipulation failed to remove pages from the release list.
      
      After a second grace period the pages get into rcu_free_kmmio_fault_pages()
      and raise a BUG_ON() kernel crash.
      
      The list manipulation is fixed to properly remove pages from the release
      list.
      
      This bug has been present from the very beginning of mmiotrace in the
      mainline kernel. It was introduced in 0fd0e3da ("x86: mmiotrace full
      patch, preview 1");
      
      An urgent fix for Linus. Tested by Stuart (on 32-bit) and Pekka
      (on amd and intel 64-bit systems, nouveau and nvidia proprietary).
      Signed-off-by: NStuart Bennett <stuart@freedesktop.org>
      Signed-off-by: NPekka Paalanen <pq@iki.fi>
      LKML-Reference: <20090308202135.34933feb@daedalus.pq.iki.fi>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      d0fc63f7
    • L
      7a203f3b
    • L
      Merge branch 'core-fixes-for-linus' of... · dbb9be8a
      Linus Torvalds 提交于
      Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
      
      * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
        rcu: increment quiescent state counter in ksoftirqd()
      dbb9be8a
    • L
      Merge branch 'x86-fixes-for-linus' of... · 05e12a69
      Linus Torvalds 提交于
      Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
      
      * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
        x86, pebs: correct qualifier passed to ds_write_config() from ds_request_pebs()
        x86, bts: remove bad warning
        x86: add Dell XPS710 reboot quirk
        x86, math-emu: fix init_fpu for task != current
        x86: EFI: Back efi_ioremap with init_memory_mapping instead of FIX_MAP
        x86: fix DMI on EFI
      05e12a69
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog · cd3c1cde
      Linus Torvalds 提交于
      * git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
        [WATCHDOG] orion5x_wdt.c: 'ORION5X_TCLK' undeclared
        [WATCHDOG] gef_wdt.c: fsl_get_sys_freq() failure not noticed
        [WATCHDOG] ks8695_wdt.c: 'CLOCK_TICK_RATE' undeclared
        [WATCHDOG] rc32434_wdt: fix sections
        [WATCHDOG] rc32434_wdt: fix watchdog driver
      cd3c1cde
    • L
      Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 5b61f6ac
      Linus Torvalds 提交于
      * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        ext4: fix ext4_free_inode() vs. ext4_claim_inode() race
      5b61f6ac
    • L
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 · 14016899
      Linus Torvalds 提交于
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: (28 commits)
        Blackfin arch: SPI_MMC is now mainlined MMC_SPI
        Blackfin arch: disable legacy /proc/scsi/ support by default
        Blackfin arch: remove duplicated ANOMALY_05000448 ifdef check
        Blackfin arch: add stubs for anomalies 447 and 448
        Blackfin arch: cleanup bfin_sport.h header and export it to userspace
        Blackfin arch: fix bug - gdb signull case make trunk kernel panic frequently
        Blackfin arch: remove spurious dash when dcache is off
        Blackfin arch: mark init_pda as __init as only __init funcs all it
        Blackfin arch: fix bug - On bf548-ezkit, ethernet fails to work after wakeup from "mem"
        Blackfin arch: Random read/write errors are a bad thing
        Blackfin arch: update default kernel config, select KSZ8893M driver for BF518
        Blackfin arch: Fix bug - KGDB single step into the middle of a 4 bytes instruction on bf561 after soft bp is hit
        Blackfin arch: Fix bug - make ksz8893m driver available when bfin_mac is enabled
        Blackfin arch: make sure people do not set the kernel load address too high
        Blackfin arch: fix bug - The SPORT_HYS bit is not set for BF561 0.5
        Blackfin arch: update anomaly sheets to match latest public info
        Blackfin arch: Fix BUG - kernel fails to build in pm.c when allow wakeup fromi standby by GPIO
        Blackfin arch: PM_BFIN_WAKE_GP: update help
        Blackfin arch: fix bug - kgdb fails to continue after setting breakpoint on bf561-ezkit kernel with smp patch
        Blackfin arch: Enable Write Back Cache on all Blackfin Boards
        ...
      14016899