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  1. 14 9月, 2012 4 次提交
  3. 13 9月, 2012 19 次提交
  5. 12 9月, 2012 3 次提交
  7. 11 9月, 2012 13 次提交
    • D
      drm/i915: fix up the IBX transcoder B check · 75c5da27
      由 Daniel Vetter 提交于 
      This has been added in

commit de9a35ab
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Jun 5 11:03:40 2012 +0200

    drm/i915: assert that the IBX port transcoder select w/a is implemented

Unfortunately I've failed to notice that these checks are not just
called for the port that is about to be disabled, but for all (which
makes sense for an assert ...), and the WARN missfired when disabling
another pipe than the one with the dp port.

Hence also check whether the port is actually disabled.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=54688Reviewed-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-Off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
      75c5da27
    • H
      crypto: authenc - Fix crash with zero-length assoc data · 9b2f4cb6
      由 Herbert Xu 提交于 
      The authenc code doesn't deal with zero-length associated data
correctly and ends up constructing a zero-length sg entry which
causes a crash when it's fed into the crypto system.

This patch fixes this by avoiding the code-path that triggers
the SG construction if we have no associated data.

This isn't the most optimal fix as it means that we'll end up
using the fallback code-path even when we could still execute
the digest function.  However, this isn't a big deal as nobody
but the test path would supply zero-length associated data.
Reported-by: NRomain Francoise <romain@orebokech.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Tested-by: NRomain Francoise <romain@orebokech.com>
      9b2f4cb6
    • J
      kbuild: add symbol prefix arg to kallsyms · 6895f97e
      由 James Hogan 提交于 
      Commit 1f2bfbd0 ("kbuild: link of
vmlinux moved to a script") introduced in v3.5-rc1 broke kallsyms on
architectures which have symbol prefixes.

The --symbol-prefix argument used to be added to the KALLSYMS command
line from the architecture Makefile, however this isn't picked up by the
new scripts/link-vmlinux.sh. This resulted in symbols like
kallsyms_addresses being added which weren't correctly overriding the
weak symbols such as _kallsyms_addresses. These could then trigger
BUG_ONs in kallsyms code.

This is fixed by removing the KALLSYMS addition from the architecture
Makefile, and using CONFIG_SYMBOL_PREFIX in the link-vmlinux.sh script
to determine whether to add the --symbol-prefix argument.
Signed-off-by: NJames Hogan <james.hogan@imgtec.com>
Signed-off-by: NBob Liu <lliubbo@gmail.com>
      6895f97e
    • L
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 1a95620f
      由 Linus Torvalds 提交于 
      Pull SCSI fixes from James Bottomley:
 "I had actually prepared this fix set before I left for KS + Plumbers,
  so it's been incubating much longer than it should have.  I'll be
  picking up my three week backlog this week, so more fixes will then be
  forthcoming

  This set consist of three minor and one fairly major (the device not
  ready causing offlining problem which is a serious regression
  introduced by the media change update) fixes.

  Signed-off-by: James Bottomley <JBottomley@Parallels.com>"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  [SCSI] Fix 'Device not ready' issue on mpt2sas
  [SCSI] scsi_lib: fix scsi_io_completion's SG_IO error propagation
  [SCSI] megaraid_sas: Move poll_aen_lock initializer
  [SCSI] mpt2sas: Fix for Driver oops, when loading driver with max_queue_depth command line option to a very small value
      1a95620f
    • L
      Merge tag 'kvm-3.6-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm · ffc29649
      由 Linus Torvalds 提交于 
      Pull KVM updates from Avi Kivity:
 "A trio of KVM fixes: incorrect lookup of guest cpuid, an uninitialized
  variable fix, and error path cleanup fix."

* tag 'kvm-3.6-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: fix error paths for failed gfn_to_page() calls
  KVM: x86: Check INVPCID feature bit in EBX of leaf 7
  KVM: PIC: fix use of uninitialised variable.
      ffc29649
    • L
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse · 44346cfe
      由 Linus Torvalds 提交于 
      Pull FUSE fixes from Miklos Szeredi:
 "This contains bugfixes for FUSE and CUSE and a compile warning fix."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: fix retrieve length
  fuse: mark variables uninitialized
  cuse: kill connection on initialization error
  cuse: fix fuse_conn_kill()
      44346cfe
    • L
      Merge branch 'for-linus' of git://git.samba.org/sfrench/cifs-2.6 · e9bd8f16
      由 Linus Torvalds 提交于 
      Pull CIFS fixes from Steve French.

* 'for-linus' of git://git.samba.org/sfrench/cifs-2.6:
  CIFS: Fix endianness conversion
  CIFS: Fix error handling in cifs_push_mandatory_locks
      e9bd8f16
    • L
      Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs · 1b0a9069
      由 Linus Torvalds 提交于 
      Pull UDF and ext3 fixes from Jan Kara:
 "One UDF data corruption fix and one ext3 fix where we didn't write
  everything to disk on fsync in one corner case."

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  udf: Fix data corruption for files in ICB
  ext3: Fix fdatasync() for files with only i_size changes
      1b0a9069
    • D
      drm/i915: set the right gen3 flip_done mode also at resume · 974a3b0f
      由 Daniel Vetter 提交于 
      Currently we've only frobbed this bit at irq_init time, but did
not restore it at resume time. Move it to the gen3 clock gating
function to fix this.

Notice while reading through code.

Cc: stable@vger.kernel.org (for 3.5 only)
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
      974a3b0f
    • L
      Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging · 6562271a
      由 Linus Torvalds 提交于 
      Pull i2c subsystem fixes from Jean Delvare.

* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  i2c-core: Fix for lockdep validator
  i2c-designware: Fix build error if CONFIG_I2C_DESIGNWARE_PLATFORM=y && CONFIG_I2C_DESIGNWARE_PCI=y
  i2c-i801: Add Device IDs for Intel Lynx Point-LP PCH
      6562271a
    • L
      workqueue: fix possible idle worker depletion across CPU hotplug · ee378aa4
      由 Lai Jiangshan 提交于 
      To simplify both normal and CPU hotplug paths, worker management is
prevented while CPU hoplug is in progress.  This is achieved by CPU
hotplug holding the same exclusion mechanism used by workers to ensure
there's only one manager per pool.

If someone else seems to be performing the manager role, workers
proceed to execute work items.  CPU hotplug using the same mechanism
can lead to idle worker depletion because all workers could proceed to
execute work items while CPU hotplug is in progress and CPU hotplug
itself wouldn't actually perform the worker management duty - it
doesn't guarantee that there's an idle worker left when it releases
management.

This idle worker depletion, under extreme circumstances, can break
forward-progress guarantee and thus lead to deadlock.

This patch fixes the bug by using separate mechanisms for manager
exclusion among workers and hotplug exclusion.  For manager exclusion,
POOL_MANAGING_WORKERS which was restored by the previous patch is
used.  pool->manager_mutex is now only used for exclusion between the
elected manager and CPU hotplug.  The elected manager won't proceed
without holding pool->manager_mutex.

This ensures that the worker which won the manager position can't skip
managing while CPU hotplug is in progress.  It will block on
manager_mutex and perform management after CPU hotplug is complete.

Note that hotplug may happen while waiting for manager_mutex.  A
manager isn't either on idle or busy list and thus the hoplug code
can't unbind/rebind it.  Make the manager handle its own un/rebinding.

tj: Updated comment and description.
Signed-off-by: NLai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: NTejun Heo <tj@kernel.org>
      ee378aa4
    • L
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · 5d67f2e8
      由 Linus Torvalds 提交于 
      Pull drm fixes from Dave Airlie:
 "Just noticed I hadn't send these out, nothing majorly urgent, I know
  AMD guys have some regression fixes coming soon.

  This contains:
   2 nouveau fixes so it loads on the retina MBP systems properly,
   2 vmwgfx fixes to load the driver earlier, and allow distros config it
   1 error->debug fix in ast
  and Keith was playing with 32-on-64 and decided we may as well stick
  the compat ioctl in all the drivers.  It fixes udl for him."

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/vmwgfx: add MODULE_DEVICE_TABLE so vmwgfx loads at boot
  drm/vmwgfx: allow a kconfig option to choose if fbcon is enabled
  drm: use drm_compat_ioctl for 32-bit apps
  drm/ast: drop debug level on error printk
  drm/nv50-/gpio: initialise to vbios defaults during init
  drm/nvd0/disp: hopefully fix selection of 6/8bpc mode on DP outputs
      5d67f2e8
    • L
      workqueue: restore POOL_MANAGING_WORKERS · 552a37e9
      由 Lai Jiangshan 提交于 
      This patch restores POOL_MANAGING_WORKERS which was replaced by
pool->manager_mutex by 60373152 "workqueue: use mutex for global_cwq
manager exclusion".

There's a subtle idle worker depletion bug across CPU hotplug events
and we need to distinguish an actual manager and CPU hotplug
preventing management.  POOL_MANAGING_WORKERS will be used for the
former and manager_mutex the later.

This patch just lays POOL_MANAGING_WORKERS on top of the existing
manager_mutex and doesn't introduce any synchronization changes.  The
next patch will update it.

Note that this patch fixes a non-critical anomaly where
too_many_workers() may return %true spuriously while CPU hotplug is in
progress.  While the issue could schedule idle timer spuriously, it
didn't trigger any actual misbehavior.

tj: Rewrote patch description.
Signed-off-by: NLai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: NTejun Heo <tj@kernel.org>
      552a37e9
  9. 10 9月, 2012 1 次提交
    • X
      KVM: fix error paths for failed gfn_to_page() calls · 4484141a
      由 Xiao Guangrong 提交于 
      This bug was triggered:
[ 4220.198458] BUG: unable to handle kernel paging request at fffffffffffffffe
[ 4220.203907] IP: [<ffffffff81104d85>] put_page+0xf/0x34
......
[ 4220.237326] Call Trace:
[ 4220.237361]  [<ffffffffa03830d0>] kvm_arch_destroy_vm+0xf9/0x101 [kvm]
[ 4220.237382]  [<ffffffffa036fe53>] kvm_put_kvm+0xcc/0x127 [kvm]
[ 4220.237401]  [<ffffffffa03702bc>] kvm_vcpu_release+0x18/0x1c [kvm]
[ 4220.237407]  [<ffffffff81145425>] __fput+0x111/0x1ed
[ 4220.237411]  [<ffffffff8114550f>] ____fput+0xe/0x10
[ 4220.237418]  [<ffffffff81063511>] task_work_run+0x5d/0x88
[ 4220.237424]  [<ffffffff8104c3f7>] do_exit+0x2bf/0x7ca

The test case:

	printf(fmt, ##args);		\
	exit(-1);} while (0)

static int create_vm(void)
{
	int sys_fd, vm_fd;

	sys_fd = open("/dev/kvm", O_RDWR);
	if (sys_fd < 0)
		die("open /dev/kvm fail.\n");

	vm_fd = ioctl(sys_fd, KVM_CREATE_VM, 0);
	if (vm_fd < 0)
		die("KVM_CREATE_VM fail.\n");

	return vm_fd;
}

static int create_vcpu(int vm_fd)
{
	int vcpu_fd;

	vcpu_fd = ioctl(vm_fd, KVM_CREATE_VCPU, 0);
	if (vcpu_fd < 0)
		die("KVM_CREATE_VCPU ioctl.\n");
	printf("Create vcpu.\n");
	return vcpu_fd;
}

static void *vcpu_thread(void *arg)
{
	int vm_fd = (int)(long)arg;

	create_vcpu(vm_fd);
	return NULL;
}

int main(int argc, char *argv[])
{
	pthread_t thread;
	int vm_fd;

	(void)argc;
	(void)argv;

	vm_fd = create_vm();
	pthread_create(&thread, NULL, vcpu_thread, (void *)(long)vm_fd);
	printf("Exit.\n");
	return 0;
}

It caused by release kvm->arch.ept_identity_map_addr which is the
error page.

The parent thread can send KILL signal to the vcpu thread when it was
exiting which stops faulting pages and potentially allocating memory.
So gfn_to_pfn/gfn_to_page may fail at this time

Fixed by checking the page before it is used
Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>
      4484141a