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The 720p and 1080p entries are completely redundant, as we are matching
the table entries against <=pclk.
Also generalize the comment, as we are using those table entries even
when driving other modes than the standard TV ones.
Signed-off-by: Lucas Stach <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
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Window properties are programmed through a shared aperture and have to
happen atomically. Also we do the read-update-write dance on some of the
shared regs.
To make sure that different functions don't stumble over each other
protect the register access with a mutex.
Signed-off-by: Lucas Stach <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
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No real problem for now, as nothing is using this, but leaving it
unitialized is asking for trouble later on.
Signed-off-by: Lucas Stach <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
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Fixes wrong picture offset observed when using HDMI output with a
Technisat HD TV.
Signed-off-by: Lucas Stach <[email protected]>
Acked-by: Mark Zhang <[email protected]>
Tested-by: Mark Zhang <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
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git://people.freedesktop.org/~danvet/drm-intel into drm-next
Some fixes for 3.8:
- Watermark fixups from Chris Wilson (4 pieces).
- 2 snb workarounds, seem to be recently added to our internal DB.
- workaround for the infamous i830/i845 hang, seems now finally solid!
Based on Chris' fix for SNA, now also for UXA/mesa&old SNA.
- Some more fixlets for shrinker-pulls-the-rug issues (Chris&me).
- Fix dma-buf flags when exporting (you).
- Disable the VGA plane if it's enabled on lid open - similar fix in
spirit to the one I've sent you last weeek, BIOS' really like to mess
with the display when closing the lid (awesome debug work from Krzysztof
Mazur).
* 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel:
drm/i915: disable shrinker lock stealing for create_mmap_offset
drm/i915: optionally disable shrinker lock stealing
drm/i915: fix flags in dma buf exporting
i915: ensure that VGA plane is disabled
drm/i915: Preallocate the drm_mm_node prior to manipulating the GTT drm_mm manager
drm: Export routines for inserting preallocated nodes into the mm manager
drm/i915: don't disable disconnected outputs
drm/i915: Implement workaround for broken CS tlb on i830/845
drm/i915: Implement WaSetupGtModeTdRowDispatch
drm/i915: Implement WaDisableHiZPlanesWhenMSAAEnabled
drm/i915: Prefer CRTC 'active' rather than 'enabled' during WM computations
drm/i915: Clear self-refresh watermarks when disabled
drm/i915: Double the cursor self-refresh latency on Valleyview
drm/i915: Fixup cursor latency used for IVB lp3 watermarks
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into drm-next
Misc fixes for reset and new packets for userspace usage.
* 'drm-fixes-3.8' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon: add WAIT_UNTIL to evergreen VM safe reg list
drm/radeon: add support for MEM_WRITE packet
drm/radeon: restore modeset late in GPU reset path
drm/radeon: avoid deadlock in pm path when waiting for fence
drm/radeon: don't leave fence blocked process on failed GPU reset
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git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-next
Fixes the accel support for nvd9 + kepler chipsets, also fixes GK106 support.
* 'drm-nouveau-fixes-3.8' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
drm/nve0/graph: fix fuc, and enable acceleration on all known chipsets
drm/nvc0/graph: fix fuc, and enable acceleration on GF119
drm/nouveau/bios: cache ramcfg strap on later chipsets
drm/nouveau/mxm: silence output if no bios data
drm/nouveau/bios: parse/display extra version component
drm/nouveau/bios: implement opcode 0xa9
drm/nouveau/bios: update gpio parsing apis to match current design
drm/nouveau: initial support for GK106
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An unintended consequence of commit 4ae0a48b5efc ("mm: modify
pgdat_balanced() so that it also handles order-0") is that
wait_iff_congested() can now be called with NULL 'struct zone *'
producing kernel oops like this:
BUG: unable to handle kernel NULL pointer dereference
IP: [<ffffffff811542d9>] wait_iff_congested+0x59/0x140
This trivial patch fixes it.
Reported-by: Zhouping Liu <[email protected]>
Reported-and-tested-by: Sedat Dilek <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Hugh Dickins <[email protected]>
Signed-off-by: Zlatko Calusic <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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From Maxime Ripard:
Fixes for the sunxi core to be merged in 3.8-rc2
* tag 'sunxi-fixes-for-3.8-rc2' of git://github.com/mripard/linux:
sunxi: Change the machine compatible string.
ARM: multi_v7_defconfig: Add ARCH_SUNXI
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We should not set con->state to CLOSED here; that happens in
ceph_fault() in the caller, where it first asserts that the state
is not yet CLOSED. Avoids a BUG when the features don't match.
Since the fail_protocol() has become a trivial wrapper, replace
calls to it with direct calls to reset_connection().
Signed-off-by: Sage Weil <[email protected]>
Reviewed-by: Alex Elder <[email protected]>
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A number of assertions in the ceph messenger are implemented with
BUG_ON(), killing the system if connection's state doesn't match
what's expected. At this point our state model is (evidently) not
well understood enough for these assertions to trigger a BUG().
Convert all BUG_ON(con->state...) calls to be WARN_ON(con->state...)
so we learn about these issues without killing the machine.
We now recognize that a connection fault can occur due to a socket
closure at any time, regardless of the state of the connection. So
there is really nothing we can assert about the state of the
connection at that point so eliminate that assertion.
Reported-by: Ugis <[email protected]>
Tested-by: Ugis <[email protected]>
Signed-off-by: Alex Elder <[email protected]>
Reviewed-by: Sage Weil <[email protected]>
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When ceph_osdc_handle_map() is called to process a new osd map,
kick_requests() is called to ensure all affected requests are
updated if necessary to reflect changes in the osd map. This
happens in two cases: whenever an incremental map update is
processed; and when a full map update (or the last one if there is
more than one) gets processed.
In the former case, the kick_requests() call is followed immediately
by a call to reset_changed_osds() to ensure any connections to osds
affected by the map change are reset. But for full map updates
this isn't done.
Both cases should be doing this osd reset.
Rather than duplicating the reset_changed_osds() call, move it into
the end of kick_requests().
Signed-off-by: Alex Elder <[email protected]>
Reviewed-by: Sage Weil <[email protected]>
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The kick_requests() function is called by ceph_osdc_handle_map()
when an osd map change has been indicated. Its purpose is to
re-queue any request whose target osd is different from what it
was when it was originally sent.
It is structured as two loops, one for incomplete but registered
requests, and a second for handling completed linger requests.
As a special case, in the first loop if a request marked to linger
has not yet completed, it is moved from the request list to the
linger list. This is as a quick and dirty way to have the second
loop handle sending the request along with all the other linger
requests.
Because of the way it's done now, however, this quick and dirty
solution can result in these incomplete linger requests never
getting re-sent as desired. The problem lies in the fact that
the second loop only arranges for a linger request to be sent
if it appears its target osd has changed. This is the proper
handling for *completed* linger requests (it avoids issuing
the same linger request twice to the same osd).
But although the linger requests added to the list in the first loop
may have been sent, they have not yet completed, so they need to be
re-sent regardless of whether their target osd has changed.
The first required fix is we need to avoid calling __map_request()
on any incomplete linger request. Otherwise the subsequent
__map_request() call in the second loop will find the target osd
has not changed and will therefore not re-send the request.
Second, we need to be sure that a sent but incomplete linger request
gets re-sent. If the target osd is the same with the new osd map as
it was when the request was originally sent, this won't happen.
This can be fixed through careful handling when we move these
requests from the request list to the linger list, by unregistering
the request *before* it is registered as a linger request. This
works because a side-effect of unregistering the request is to make
the request's r_osd pointer be NULL, and *that* will ensure the
second loop actually re-sends the linger request.
Processing of such a request is done at that point, so continue with
the next one once it's been moved.
Signed-off-by: Alex Elder <[email protected]>
Reviewed-by: Sage Weil <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- Report i2c errors to userspace in lm73 driver
- Fix problem with DIV_ROUND_CLOSEST and unsigned divisors in emc6w201
driver
* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (emc6w201) Fix DIV_ROUND_CLOSEST problem with unsigned divisors
hwmon: (lm73} Detect and report i2c bus errors
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git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull namespace fixes from Eric Biederman:
"This tree includes two bug fixes for problems Oleg spotted on his
review of the recent pid namespace work. A small fix to not enable
bottom halves with irqs disabled, and a trivial build fix for f2fs
with user namespaces enabled."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
f2fs: Don't assign e_id in f2fs_acl_from_disk
proc: Allow proc_free_inum to be called from any context
pidns: Stop pid allocation when init dies
pidns: Outlaw thread creation after unshare(CLONE_NEWPID)
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Pull networking fixes from David Miller:
1) GRE tunnel drivers don't set the transport header properly, they also
blindly deref the inner protocol ipv4 and needs some checks. Fixes
from Isaku Yamahata.
2) Fix sleeps while atomic in netdevice rename code, from Eric Dumazet.
3) Fix double-spinlock in solos-pci driver, from Dan Carpenter.
4) More ARP bug fixes. Fix lockdep splat in arp_solicit() and then the
bug accidentally added by that fix. From Eric Dumazet and Cong Wang.
5) Remove some __dev* annotations that slipped back in, as well as all
HOTPLUG references. From Greg KH
6) RDS protocol uses wrong interfaces to access scatter-gather elements,
causing a regression. From Mike Marciniszyn.
7) Fix build error in cpts driver, from Richard Cochran.
8) Fix arithmetic in packet scheduler, from Stefan Hasko.
9) Similarly, fix association during calculation of random backoff in
batman-adv. From Akinobu Mita.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (21 commits)
ipv6/ip6_gre: set transport header correctly
ipv4/ip_gre: set transport header correctly to gre header
IB/rds: suppress incompatible protocol when version is known
IB/rds: Correct ib_api use with gs_dma_address/sg_dma_len
net/vxlan: Use the underlying device index when joining/leaving multicast groups
tcp: should drop incoming frames without ACK flag set
netprio_cgroup: define sk_cgrp_prioidx only if NETPRIO_CGROUP is enabled
cpts: fix a run time warn_on.
cpts: fix build error by removing useless code.
batman-adv: fix random jitter calculation
arp: fix a regression in arp_solicit()
net: sched: integer overflow fix
CONFIG_HOTPLUG removal from networking core
Drivers: network: more __dev* removal
bridge: call br_netpoll_disable in br_add_if
ipv4: arp: fix a lockdep splat in arp_solicit()
tuntap: dont use a private kmem_cache
net: devnet_rename_seq should be a seqcount
ip_gre: fix possible use after free
ip_gre: make ipgre_tunnel_xmit() not parse network header as IP unconditionally
...
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When trying to mount a file system which does not contain a journal,
but which does have a orphan list containing an inode which needs to
be truncated, the mount call with hang forever in
ext4_orphan_cleanup() because ext4_orphan_del() will return
immediately without removing the inode from the orphan list, leading
to an uninterruptible loop in kernel code which will busy out one of
the CPU's on the system.
This can be trivially reproduced by trying to mount the file system
found in tests/f_orphan_extents_inode/image.gz from the e2fsprogs
source tree. If a malicious user were to put this on a USB stick, and
mount it on a Linux desktop which has automatic mounts enabled, this
could be considered a potential denial of service attack. (Not a big
deal in practice, but professional paranoids worry about such things,
and have even been known to allocate CVE numbers for such problems.)
Signed-off-by: "Theodore Ts'o" <[email protected]>
Reviewed-by: Zheng Liu <[email protected]>
Cc: [email protected]
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Commit c278531d39 added a warning when ext4_flush_unwritten_io() is
called without i_mutex being taken. It had previously not been taken
during orphan cleanup since races weren't possible at that point in
the mount process, but as a result of this c278531d39, we will now see
a kernel WARN_ON in this case. Take the i_mutex in
ext4_orphan_cleanup() to suppress this warning.
Reported-by: Alexander Beregalov <[email protected]>
Signed-off-by: "Theodore Ts'o" <[email protected]>
Reviewed-by: Zheng Liu <[email protected]>
Cc: [email protected]
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ip6gre_xmit2() incorrectly sets transport header to inner payload
instead of GRE header. It seems copy-and-pasted from ipip.c.
Set transport header to gre header.
(In ipip case the transport header is the inner ip header, so that's
correct.)
Found by inspection. In practice the incorrect transport header
doesn't matter because the skb usually is sent to another net_device
or socket, so the transport header isn't referenced.
Signed-off-by: Isaku Yamahata <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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ipgre_tunnel_xmit() incorrectly sets transport header to inner payload
instead of GRE header. It seems copy-and-pasted from ipip.c.
So set transport header to gre header.
(In ipip case the transport header is the inner ip header, so that's
correct.)
Found by inspection. In practice the incorrect transport header
doesn't matter because the skb usually is sent to another net_device
or socket, so the transport header isn't referenced.
Signed-off-by: Isaku Yamahata <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Add an else to only print the incompatible protocol message
when version hasn't been established.
Signed-off-by: Mike Marciniszyn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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0b088e00 ("RDS: Use page_remainder_alloc() for recv bufs")
added uses of sg_dma_len() and sg_dma_address(). This makes
RDS DOA with the qib driver.
IB ulps should use ib_sg_dma_len() and ib_sg_dma_address
respectively since some HCAs overload ib_sg_dma* operations.
Signed-off-by: Mike Marciniszyn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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The socket calls from vxlan to join/leave multicast group aren't
using the index of the underlying device, as a result the stack uses
the first interface that is up. This results in vxlan being non functional
over a device which isn't the 1st to be up.
Fix this by providing the iflink field to the vxlan instance
to the multicast calls.
Signed-off-by: Yan Burman <[email protected]>
Acked-by: Stephen Hemminger <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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In commit 96e0bf4b5193d (tcp: Discard segments that ack data not yet
sent) John Dykstra enforced a check against ack sequences.
In commit 354e4aa391ed5 (tcp: RFC 5961 5.2 Blind Data Injection Attack
Mitigation) I added more safety tests.
But we missed fact that these tests are not performed if ACK bit is
not set.
RFC 793 3.9 mandates TCP should drop a frame without ACK flag set.
" fifth check the ACK field,
if the ACK bit is off drop the segment and return"
Not doing so permits an attacker to only guess an acceptable sequence
number, evading stronger checks.
Many thanks to Zhiyun Qian for bringing this issue to our attention.
See :
http://web.eecs.umich.edu/~zhiyunq/pub/ccs12_TCP_sequence_number_inference.pdf
Reported-by: Zhiyun Qian <[email protected]>
Signed-off-by: Eric Dumazet <[email protected]>
Cc: Nandita Dukkipati <[email protected]>
Cc: Neal Cardwell <[email protected]>
Cc: John Dykstra <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Unfortunately with !CONFIG_PAGEFLAGS_EXTENDED, (!PageHead) is false, and
(PageHead) is true, for tail pages. If this is indeed the intended
behavior, which I doubt because it breaks cache cleaning on some ARM
systems, then the nomenclature is highly problematic.
This patch makes sure PageHead is only true for head pages and PageTail
is only true for tail pages, and neither is true for non-compound pages.
[ This buglet seems ancient - seems to have been introduced back in Apr
2008 in commit 6a1e7f777f61: "pageflags: convert to the use of new
macros". And the reason nobody noticed is because the PageHead()
tests are almost all about just sanity-checking, and only used on
pages that are actual page heads. The fact that the old code returned
true for tail pages too was thus not really noticeable. - Linus ]
Signed-off-by: Christoffer Dall <[email protected]>
Acked-by: Andrea Arcangeli <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Steve Capper <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: [email protected] # 2.6.26+
Signed-off-by: Linus Torvalds <[email protected]>
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sock->sk_cgrp_prioidx won't be used at all if CONFIG_NETPRIO_CGROUP=n.
Signed-off-by: Li Zefan <[email protected]>
Acked-by: Neil Horman <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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This patch fixes a warning in clk_enable by calling clk_prepare_enable
instead.
Signed-off-by: Richard Cochran <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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The cpts driver tries to obtain the input clock frequency by calling the
clock's internal 'recalc' method. Since <plat/clock.h> has been removed,
this code can no longer compile.
However, the driver never makes use of the frequency value, so this patch
fixes the issue by removing the offending code altogether.
Signed-off-by: Richard Cochran <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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batadv_iv_ogm_emit_send_time() attempts to calculates a random integer
in the range of 'orig_interval +- BATADV_JITTER' by the below lines.
msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER;
msecs += (random32() % 2 * BATADV_JITTER);
But it actually gets 'orig_interval' or 'orig_interval - BATADV_JITTER'
because '%' and '*' have same precedence and associativity is
left-to-right.
This adds the parentheses at the appropriate position so that it matches
original intension.
Signed-off-by: Akinobu Mita <[email protected]>
Acked-by: Antonio Quartulli <[email protected]>
Cc: Marek Lindner <[email protected]>
Cc: Simon Wunderlich <[email protected]>
Cc: Antonio Quartulli <[email protected]>
Cc: [email protected]
Cc: "David S. Miller" <[email protected]>
Cc: [email protected]
Signed-off-by: David S. Miller <[email protected]>
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Otherwise it fails like this on cards like the Transcend 16GB SDHC card:
mmc0: new SDHC card at address b368
mmcblk0: mmc0:b368 SDC 15.0 GiB
mmcblk0: error -110 sending status command, retrying
mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb0
Tested on my Lenovo x200 laptop.
[bhelgaas: changelog]
Signed-off-by: Andy Lutomirski <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Acked-by: Chris Ball <[email protected]>
CC: Manoj Iyer <[email protected]>
CC: [email protected]
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Ulrich reported that his USB3 cardreader does not work reliably when
connected to the USB3 port. It turns out that USB3 controller failed to
awaken when plugging in the USB3 cardreader. Further experiments found
that the USB3 host controller can only be awakened via polling, not via PME
interrupt. But if the PCIe port to which the USB3 host controller is
connected is suspended, we cannot poll the controller because its config
space is not accessible when the PCIe port is in a low power state.
To solve the issue, the PCIe port will not be suspended if any subordinate
device needs PME polling.
[bhelgaas: use bool consistently rather than mixing int/bool]
Reference: http://lkml.kernel.org/r/[email protected]
Reported-by: Ulrich Eckhardt <[email protected]>
Tested-by: Sarah Sharp <[email protected]>
Signed-off-by: Huang Ying <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]>
CC: [email protected] # v3.6+
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Add standard #defines for the Supported Link Speeds field in the PCIe
Link Capabilities register.
Note that prior to PCIe spec r3.0, these encodings were defined:
0001b 2.5GT/s Link speed supported
0010b 5.0GT/s and 2.5GT/s Link speed supported
Starting with spec r3.0, these encodings refer to bits 0 and 1 in the
Supported Link Speeds Vector in the Link Capabilities 2 register, and bits
0 and 1 there mean 2.5 GT/s and 5.0 GT/s, respectively. Therefore, code
that followed r2.0 and interpreted 0x1 as 2.5GT/s and 0x2 as 5.0GT/s will
continue to work, and we can identify a device using the new encodings
because it will have a non-zero Link Capabilities 2 register.
Signed-off-by: Bjorn Helgaas <[email protected]>
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Commit 284f5f9 was intended to disable the "only_one_child()" optimization
on Stratus ftServer systems, but its DMI check is wrong. It looks for
DMI_SYS_VENDOR that contains "ftServer", when it should look for
DMI_SYS_VENDOR containing "Stratus" and DMI_PRODUCT_NAME containing
"ftServer".
Tested on Stratus ftServer 6400.
Reported-by: Fadeeva Marina <[email protected]>
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=51331
Signed-off-by: Myron Stowe <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
CC: [email protected] # v3.5+
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If we request "num_vfs" and the driver's sriov_configure() method enables
exactly that number ("num_vfs_enabled"), we complain "Invalid value for
number of VFs to enable" and return an error. We should silently return
success instead.
Also, use kstrtou16() since numVFs is defined to be a 16-bit field and
rework to simplify control flow.
Reported-by: Greg Rose <[email protected]>
Reference: http://lkml.kernel.org/r/20121214101911.00002f59@unknown
Signed-off-by: Bjorn Helgaas <[email protected]>
Tested-by: Donald Dutile <[email protected]>
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With user namespaces enabled building f2fs fails with:
CC fs/f2fs/acl.o
fs/f2fs/acl.c: In function ‘f2fs_acl_from_disk’:
fs/f2fs/acl.c:85:21: error: ‘struct posix_acl_entry’ has no member named ‘e_id’
make[2]: *** [fs/f2fs/acl.o] Error 1
make[2]: Target `__build' not remade because of errors.
e_id is a backwards compatibility field only used for file systems
that haven't been converted to use kuids and kgids. When the posix
acl tag field is neither ACL_USER nor ACL_GROUP assigning e_id is
unnecessary. Remove the assignment so f2fs will build with user
namespaces enabled.
Cc: Namjae Jeon <[email protected]>
Cc: Amit Sahrawat <[email protected]>
Acked-by: Jaegeuk Kim <[email protected]>
Signed-off-by: "Eric W. Biederman" <[email protected]>
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While testing the pid namespace code I hit this nasty warning.
[ 176.262617] ------------[ cut here ]------------
[ 176.263388] WARNING: at /home/eric/projects/linux/linux-userns-devel/kernel/softirq.c:160 local_bh_enable_ip+0x7a/0xa0()
[ 176.265145] Hardware name: Bochs
[ 176.265677] Modules linked in:
[ 176.266341] Pid: 742, comm: bash Not tainted 3.7.0userns+ #18
[ 176.266564] Call Trace:
[ 176.266564] [<ffffffff810a539f>] warn_slowpath_common+0x7f/0xc0
[ 176.266564] [<ffffffff810a53fa>] warn_slowpath_null+0x1a/0x20
[ 176.266564] [<ffffffff810ad9ea>] local_bh_enable_ip+0x7a/0xa0
[ 176.266564] [<ffffffff819308c9>] _raw_spin_unlock_bh+0x19/0x20
[ 176.266564] [<ffffffff8123dbda>] proc_free_inum+0x3a/0x50
[ 176.266564] [<ffffffff8111d0dc>] free_pid_ns+0x1c/0x80
[ 176.266564] [<ffffffff8111d195>] put_pid_ns+0x35/0x50
[ 176.266564] [<ffffffff810c608a>] put_pid+0x4a/0x60
[ 176.266564] [<ffffffff8146b177>] tty_ioctl+0x717/0xc10
[ 176.266564] [<ffffffff810aa4d5>] ? wait_consider_task+0x855/0xb90
[ 176.266564] [<ffffffff81086bf9>] ? default_spin_lock_flags+0x9/0x10
[ 176.266564] [<ffffffff810cab0a>] ? remove_wait_queue+0x5a/0x70
[ 176.266564] [<ffffffff811e37e8>] do_vfs_ioctl+0x98/0x550
[ 176.266564] [<ffffffff810b8a0f>] ? recalc_sigpending+0x1f/0x60
[ 176.266564] [<ffffffff810b9127>] ? __set_task_blocked+0x37/0x80
[ 176.266564] [<ffffffff810ab95b>] ? sys_wait4+0xab/0xf0
[ 176.266564] [<ffffffff811e3d31>] sys_ioctl+0x91/0xb0
[ 176.266564] [<ffffffff810a95f0>] ? task_stopped_code+0x50/0x50
[ 176.266564] [<ffffffff81939199>] system_call_fastpath+0x16/0x1b
[ 176.266564] ---[ end trace 387af88219ad6143 ]---
It turns out that spin_unlock_bh(proc_inum_lock) is not safe when
put_pid is called with another spinlock held and irqs disabled.
For now take the easy path and use spin_lock_irqsave(proc_inum_lock)
in proc_free_inum and spin_loc_irq in proc_alloc_inum(proc_inum_lock).
Signed-off-by: "Eric W. Biederman" <[email protected]>
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Oleg pointed out that in a pid namespace the sequence.
- pid 1 becomes a zombie
- setns(thepidns), fork,...
- reaping pid 1.
- The injected processes exiting.
Can lead to processes attempting access their child reaper and
instead following a stale pointer.
That waitpid for init can return before all of the processes in
the pid namespace have exited is also unfortunate.
Avoid these problems by disabling the allocation of new pids in a pid
namespace when init dies, instead of when the last process in a pid
namespace is reaped.
Pointed-out-by: Oleg Nesterov <[email protected]>
Reviewed-by: Oleg Nesterov <[email protected]>
Signed-off-by: "Eric W. Biederman" <[email protected]>
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When a journal-less ext4 filesystem is mounted on a read-only block
device (blockdev --setro will do), each remount (for other, unrelated,
flags, like suid=>nosuid etc) results in a series of scary messages
from kernel telling about I/O errors on the device.
This is becauese of the following code ext4_remount():
if (sbi->s_journal == NULL)
ext4_commit_super(sb, 1);
at the end of remount procedure, which forces writing (flushing) of
a superblock regardless whenever it is dirty or not, if the filesystem
is readonly or not, and whenever the device itself is readonly or not.
We only need call ext4_commit_super when the file system had been
previously mounted read/write.
Thanks to Eric Sandeen for help in diagnosing this issue.
Signed-off-By: Michael Tokarev <[email protected]>
Signed-off-by: "Theodore Ts'o" <[email protected]>
Cc: [email protected]
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To more accurately calculate overhead for "bsd" style
df reporting, we should count the journal blocks as
overhead as well.
Signed-off-by: Eric Sandeen <[email protected]>
Signed-off-by: "Theodore Ts'o" <[email protected]>
Tested-by: Eric Whitney <[email protected]>
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Although I put this in, I now think it was a bad decision. For most
users, there is very little to be done in this case. They get the
message, once per day, with no real context or proposed action. TBH,
it generates support calls when it probably does not need to; the
message sounds more dire than the situation really is.
Just nuke it. Normal investigation via blktrace or whatnot can
reveal poor IO patterns if bad performance is encountered.
Signed-off-by: Eric Sandeen <[email protected]>
Signed-off-by: "Theodore Ts'o" <[email protected]>
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i_mutex is not held when ->sync_file is called.
Reviewed-by: Jan Kara <[email protected]>
Signed-off-by: Andy Lutomirski <[email protected]>
Signed-off-by: "Theodore Ts'o" <[email protected]>
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We cannot wait for transaction commit in journal_unmap_buffer()
because we hold page lock which ranks below transaction start. We
solve the issue by bailing out of journal_unmap_buffer() and
jbd2_journal_invalidatepage() with -EBUSY. Caller is then responsible
for waiting for transaction commit to finish and try invalidation
again. Since the issue can happen only for page stradding i_size, it
is simple enough to manually call jbd2_journal_invalidatepage() for
such page from ext4_setattr(), check the return value and wait if
necessary.
Signed-off-by: Jan Kara <[email protected]>
Signed-off-by: "Theodore Ts'o" <[email protected]>
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In data=journal mode we don't need delalloc or DIO handling in invalidatepage
and similarly in other modes we don't need the journal handling. So split
invalidatepage implementations.
Signed-off-by: Jan Kara <[email protected]>
Signed-off-by: "Theodore Ts'o" <[email protected]>
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The sequence:
unshare(CLONE_NEWPID)
clone(CLONE_THREAD|CLONE_SIGHAND|CLONE_VM)
Creates a new process in the new pid namespace without setting
pid_ns->child_reaper. After forking this results in a NULL
pointer dereference.
Avoid this and other nonsense scenarios that can show up after
creating a new pid namespace with unshare by adding a new
check in copy_prodcess.
Pointed-out-by: Oleg Nesterov <[email protected]>
Acked-by: Oleg Nesterov <[email protected]>
Signed-off-by: "Eric W. Biederman" <[email protected]>
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Sedat reported the following commit caused a regression:
commit 9650388b5c56578fdccc79c57a8c82fb92b8e7f1
Author: Eric Dumazet <[email protected]>
Date: Fri Dec 21 07:32:10 2012 +0000
ipv4: arp: fix a lockdep splat in arp_solicit
This is due to the 6th parameter of arp_send() needs to be NULL
for the broadcast case, the above commit changed it to an all-zero
array by mistake.
Reported-by: Sedat Dilek <[email protected]>
Tested-by: Sedat Dilek <[email protected]>
Cc: Sedat Dilek <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Julian Anastasov <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Acked-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Pull i2c __dev* attribute removal from Wolfram Sang:
"The squashed patches from Bill to get rid of the __dev* annotations in
the i2c subsystem. I couldn't include it in my previous pull request
due to some dependency with the mfd subsystem. I had this patch in
linux-next for two days before rc1 and nothing popped up."
* 'i2c-embedded/for-next' of git://git.pengutronix.de/git/wsa/linux:
i2c: remove __dev* attributes from subsystem
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Teach pgdat_balanced() about order-0 allocations so that we can simplify
code in a few places in vmstat.c.
Suggested-by: Andrew Morton <[email protected]>
Signed-off-by: Zlatko Calusic <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Hugh Dickins <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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controls API failures"
Commit f0ed2ce840b3 ("[media] uvcvideo: Set error_idx properly for
extended controls API failures") causes user space to behave incorrectly
on one of my test machines (there is no sound under KDE 4.9.4 using
pulseaudio and there is a knotify4 process occupying one of the CPU
cores 100% of the time). Reverting that commit entirely fixes the
problem for me.
However, commit f0ed2ce840b3 appears to do more than it follows from its
changelog, because the changelog only says about the changes related to
ctrls->error_idx, while the commit additionally changes error codes
returned by various functions in uvc_ctrl.c and uvc_v4l2.c. It turns
out that the changes of the returned error codes confuse the user spce,
so it is sufficient to revert the part of commit f0ed2ce840b3 not
mentioned in its changelog to fix the problem.
[ 'ENOENT' is not a valid error return from an ioctl to begin with, and
I don't understand how anybody ever even thought it would be. - Linus ]
Signed-off-by: Rafael J. Wysocki <[email protected]>
Cc: Laurent Pinchart <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Hans Verkuil <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Commit 68136b10 ("ARM: sunxi: Change device tree naming scheme for
sunxi") changed the naming scheme and the compatible strings used in the
device trees related to the sunXi platform, but forgot to change the
compatible string in the DT machine definition.
This prevents the kernel from booting on these boards.
Signed-off-by: Maxime Ripard <[email protected]>
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Signed-off-by: Maxime Ripard <[email protected]>
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