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2013-03-04Btrfs: allow running defrag in parallel to administrative tasksStefan Behrens
Commit 5ac00add added a testnset mutex and code that disallows running administrative tasks in parallel. It is prevented that the device add/delete/balance/replace/resize operations are started in parallel. By mistake, the defragmentation operation was included in the check for mutually exclusiveness as well. This is fixed with this commit. Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04Btrfs: avoid deadlock on transaction waiting listLiu Bo
Only let one trans handle to wait for other handles, otherwise we will get ABBA issues. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04Btrfs: do not BUG_ON on aborted situationLiu Bo
Btrfs balance can easily hit BUG_ON in these places, but we want to it bail out gracefully after we force the whole filesystem to readonly. So we use btrfs_std_error hook in place of BUG_ON. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04Btrfs: do not BUG_ON in prepare_to_relocLiu Bo
We can bail out from here gracefully instead of a cold BUG_ON. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04Btrfs: free all recorded tree blocks on errorLiu Bo
We've missed the 'free blocks' part on ENOMEM error. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04Btrfs: build up error handling for merge_reloc_rootsLiu Bo
We first use btrfs_std_error hook to replace with BUG_ON, and we also need to cleanup what is left, including reloc roots rbtree and reloc roots list. Here we use a helper function to cleanup both rbtree and list, and since this function can also be used in the balance recover path, we also make the change as well to keep code simple. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04Btrfs: check for NULL pointer in updating reloc rootsLiu Bo
Add a check for NULL pointer to avoid invalid reference. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04Btrfs: fix unclosed transaction handler when the async transaction ↵Miao Xie
commitment fails If the async transaction commitment failed, we need close the current transaction handler, or the current transaction will be blocked to commit because of this orphan handler. We fix the problem by doing sync transaction commitment, that is to invoke btrfs_commit_transaction(). Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04Btrfs: fix wrong handle at error path of create_snapshot() when the commit failsMiao Xie
There are several bugs at error path of create_snapshot() when the transaction commitment failed. - access the freed transaction handler. At the end of the transaction commitment, the transaction handler was freed, so we should not access it after the transaction commitment. - we were not aware of the error which happened during the snapshot creation if we submitted a async transaction commitment. - pending snapshot access vs pending snapshot free. when something wrong happened after we submitted a async transaction commitment, the transaction committer would cleanup the pending snapshots and free them. But the snapshot creators were not aware of it, they would access the freed pending snapshots. This patch fixes the above problems by: - remove the dangerous code that accessed the freed handler - assign ->error if the error happens during the snapshot creation - the transaction committer doesn't free the pending snapshots, just assigns the error number and evicts them before we unblock the transaction. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04Btrfs: use set_nlink if our i_nlink is 0Josef Bacik
We need to inc the nlink of deleted entries when running replay so we can do the unlink on the fs_root and get everything cleaned up and then have the orphan cleanup do the right thing. The problem is inc_nlink complains about this, even thought it still does the right thing. So use set_nlink() if our i_nlink is 0 to keep users from seeing the warnings during log replay. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04tcp: fix double-counted receiver RTT when leaving receiver fast pathNeal Cardwell
We should not update ts_recent and call tcp_rcv_rtt_measure_ts() both before and after going to step5. That wastes CPU and double-counts the receiver-side RTT sample. Signed-off-by: Neal Cardwell <ncardwell@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-04CAIF: fix sparse warning for caif_usbSilviu-Mihai Popescu
This fixes the following sparse warning: net/caif/caif_usb.c:84:16: warning: symbol 'cfusbl_create' was not declared. Should it be static? Signed-off-by: Silviu-Mihai Popescu <silviupopescu1990@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-04rds: simplify a warning messageCong Wang
Cc: David S. Miller <davem@davemloft.net> Cc: Venkat Venkatsubra <venkat.x.venkatsubra@oracle.com> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-04net: fec: fix build error in no MXC platformFrank Li
build error cause by Commit ff43da86c69d76a726ffe7d1666148960dc1d108 ("NET: FEC: dynamtic check DMA desc buff type") drivers/net/ethernet/freescale/fec.c: In function ‘fec_enet_get_nextdesc’: drivers/net/ethernet/freescale/fec.c:215:18: error: invalid use of undefined type ‘struct bufdesc_ex’ drivers/net/ethernet/freescale/fec.c: In function ‘fec_enet_get_prevdesc’: drivers/net/ethernet/freescale/fec.c:224:18: error: invalid use of undefined type ‘struct bufdesc_ex’ drivers/net/ethernet/freescale/fec.c: In function ‘fec_enet_start_xmit’: drivers/net/ethernet/freescale/fec.c:286:37: error: arithmetic on pointer to an incomplete type drivers/net/ethernet/freescale/fec.c:287:13: error: arithmetic on pointer to an incomplete type drivers/net/ethernet/freescale/fec.c:324:7: error: dereferencing pointer to incomplete type etc.... Signed-off-by: Frank Li <Frank.Li@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-04net: ipv6: Don't purge default router if accept_ra=2Lorenzo Colitti
Setting net.ipv6.conf.<interface>.accept_ra=2 causes the kernel to accept RAs even when forwarding is enabled. However, enabling forwarding purges all default routes on the system, breaking connectivity until the next RA is received. Fix this by not purging default routes on interfaces that have accept_ra=2. Signed-off-by: Lorenzo Colitti <lorenzo@google.com> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-04net: fec: put tx to napi poll function to fix dead lockFrank Li
up stack ndo_start_xmit already hold lock. fec_enet_start_xmit needn't spin lock. stat_xmit just update fep->cur_tx fec_enet_tx just update fep->dirty_tx Reserve a empty bdb to check full or empty cur_tx == dirty_tx means full cur_tx == dirty_tx +1 means empty So needn't is_full variable. Fix spin lock deadlock ================================= [ INFO: inconsistent lock state ] 3.8.0-rc5+ #107 Not tainted --------------------------------- inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. ptp4l/615 [HC1[1]:SC0[0]:HE0:SE1] takes: (&(&list->lock)->rlock#3){?.-...}, at: [<8042c3c4>] skb_queue_tail+0x20/0x50 {HARDIRQ-ON-W} state was registered at: [<80067250>] mark_lock+0x154/0x4e8 [<800676f4>] mark_irqflags+0x110/0x1a4 [<80069208>] __lock_acquire+0x494/0x9c0 [<80069ce8>] lock_acquire+0x90/0xa4 [<80527ad0>] _raw_spin_lock_bh+0x44/0x54 [<804877e0>] first_packet_length+0x38/0x1f0 [<804879e4>] udp_poll+0x4c/0x5c [<804231f8>] sock_poll+0x24/0x28 [<800d27f0>] do_poll.isra.10+0x120/0x254 [<800d36e4>] do_sys_poll+0x15c/0x1e8 [<800d3828>] sys_poll+0x60/0xc8 [<8000e780>] ret_fast_syscall+0x0/0x3c *** DEADLOCK *** 1 lock held by ptp4l/615: #0: (&(&fep->hw_lock)->rlock){-.-...}, at: [<80355f9c>] fec_enet_tx+0x24/0x268 stack backtrace: Backtrace: [<800121e0>] (dump_backtrace+0x0/0x10c) from [<80516210>] (dump_stack+0x18/0x1c) r6:8063b1fc r5:bf38b2f8 r4:bf38b000 r3:bf38b000 [<805161f8>] (dump_stack+0x0/0x1c) from [<805189d0>] (print_usage_bug.part.34+0x164/0x1a4) [<8051886c>] (print_usage_bug.part.34+0x0/0x1a4) from [<80518a88>] (print_usage_bug+0x78/0x88) r8:80065664 r7:bf38b2f8 r6:00000002 r5:00000000 r4:bf38b000 [<80518a10>] (print_usage_bug+0x0/0x88) from [<80518b58>] (mark_lock_irq+0xc0/0x270) r7:bf38b000 r6:00000002 r5:bf38b2f8 r4:00000000 [<80518a98>] (mark_lock_irq+0x0/0x270) from [<80067270>] (mark_lock+0x174/0x4e8) [<800670fc>] (mark_lock+0x0/0x4e8) from [<80067744>] (mark_irqflags+0x160/0x1a4) [<800675e4>] (mark_irqflags+0x0/0x1a4) from [<80069208>] (__lock_acquire+0x494/0x9c0) r5:00000002 r4:bf38b2f8 [<80068d74>] (__lock_acquire+0x0/0x9c0) from [<80069ce8>] (lock_acquire+0x90/0xa4) [<80069c58>] (lock_acquire+0x0/0xa4) from [<805278d8>] (_raw_spin_lock_irqsave+0x4c/0x60) [<8052788c>] (_raw_spin_lock_irqsave+0x0/0x60) from [<8042c3c4>] (skb_queue_tail+0x20/0x50) r6:bfbb2180 r5:bf1d0190 r4:bf1d0184 [<8042c3a4>] (skb_queue_tail+0x0/0x50) from [<8042c4cc>] (sock_queue_err_skb+0xd8/0x188) r6:00000056 r5:bfbb2180 r4:bf1d0000 r3:00000000 [<8042c3f4>] (sock_queue_err_skb+0x0/0x188) from [<8042d15c>] (skb_tstamp_tx+0x70/0xa0) r6:bf0dddb0 r5:bf1d0000 r4:bfbb2180 r3:00000004 [<8042d0ec>] (skb_tstamp_tx+0x0/0xa0) from [<803561d0>] (fec_enet_tx+0x258/0x268) r6:c089d260 r5:00001c00 r4:bfbd0000 [<80355f78>] (fec_enet_tx+0x0/0x268) from [<803562cc>] (fec_enet_interrupt+0xec/0xf8) [<803561e0>] (fec_enet_interrupt+0x0/0xf8) from [<8007d5b0>] (handle_irq_event_percpu+0x54/0x1a0) [<8007d55c>] (handle_irq_event_percpu+0x0/0x1a0) from [<8007d740>] (handle_irq_event+0x44/0x64) [<8007d6fc>] (handle_irq_event+0x0/0x64) from [<80080690>] (handle_fasteoi_irq+0xc4/0x15c) r6:bf0dc000 r5:bf811290 r4:bf811240 r3:00000000 [<800805cc>] (handle_fasteoi_irq+0x0/0x15c) from [<8007ceec>] (generic_handle_irq+0x28/0x38) r5:807130c8 r4:00000096 [<8007cec4>] (generic_handle_irq+0x0/0x38) from [<8000f16c>] (handle_IRQ+0x54/0xb4) r4:8071d280 r3:00000180 [<8000f118>] (handle_IRQ+0x0/0xb4) from [<80008544>] (gic_handle_irq+0x30/0x64) r8:8000e924 r7:f4000100 r6:bf0ddef8 r5:8071c974 r4:f400010c r3:00000000 [<80008514>] (gic_handle_irq+0x0/0x64) from [<8000e2e4>] (__irq_svc+0x44/0x5c) Exception stack(0xbf0ddef8 to 0xbf0ddf40) Signed-off-by: Frank Li <Frank.Li@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-04sctp: use KMALLOC_MAX_SIZE instead of its own MAX_KMALLOC_SIZECong Wang
Don't definite its own MAX_KMALLOC_SIZE, use the one defined in mm. Cc: Vlad Yasevich <vyasevich@gmail.com> Cc: Sridhar Samudrala <sri@us.ibm.com> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-04rds: limit the size allocated by rds_message_alloc()Cong Wang
Dave Jones reported the following bug: "When fed mangled socket data, rds will trust what userspace gives it, and tries to allocate enormous amounts of memory larger than what kmalloc can satisfy." WARNING: at mm/page_alloc.c:2393 __alloc_pages_nodemask+0xa0d/0xbe0() Hardware name: GA-MA78GM-S2H Modules linked in: vmw_vsock_vmci_transport vmw_vmci vsock fuse bnep dlci bridge 8021q garp stp mrp binfmt_misc l2tp_ppp l2tp_core rfcomm s Pid: 24652, comm: trinity-child2 Not tainted 3.8.0+ #65 Call Trace: [<ffffffff81044155>] warn_slowpath_common+0x75/0xa0 [<ffffffff8104419a>] warn_slowpath_null+0x1a/0x20 [<ffffffff811444ad>] __alloc_pages_nodemask+0xa0d/0xbe0 [<ffffffff8100a196>] ? native_sched_clock+0x26/0x90 [<ffffffff810b2128>] ? trace_hardirqs_off_caller+0x28/0xc0 [<ffffffff810b21cd>] ? trace_hardirqs_off+0xd/0x10 [<ffffffff811861f8>] alloc_pages_current+0xb8/0x180 [<ffffffff8113eaaa>] __get_free_pages+0x2a/0x80 [<ffffffff811934fe>] kmalloc_order_trace+0x3e/0x1a0 [<ffffffff81193955>] __kmalloc+0x2f5/0x3a0 [<ffffffff8104df0c>] ? local_bh_enable_ip+0x7c/0xf0 [<ffffffffa0401ab3>] rds_message_alloc+0x23/0xb0 [rds] [<ffffffffa04043a1>] rds_sendmsg+0x2b1/0x990 [rds] [<ffffffff810b21cd>] ? trace_hardirqs_off+0xd/0x10 [<ffffffff81564620>] sock_sendmsg+0xb0/0xe0 [<ffffffff810b2052>] ? get_lock_stats+0x22/0x70 [<ffffffff810b24be>] ? put_lock_stats.isra.23+0xe/0x40 [<ffffffff81567f30>] sys_sendto+0x130/0x180 [<ffffffff810b872d>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff816c547b>] ? _raw_spin_unlock_irq+0x3b/0x60 [<ffffffff816cd767>] ? sysret_check+0x1b/0x56 [<ffffffff810b8695>] ? trace_hardirqs_on_caller+0x115/0x1a0 [<ffffffff81341d8e>] ? trace_hardirqs_on_thunk+0x3a/0x3f [<ffffffff816cd742>] system_call_fastpath+0x16/0x1b ---[ end trace eed6ae990d018c8b ]--- Reported-by: Dave Jones <davej@redhat.com> Cc: Dave Jones <davej@redhat.com> Cc: David S. Miller <davem@davemloft.net> Cc: Venkat Venkatsubra <venkat.x.venkatsubra@oracle.com> Signed-off-by: Cong Wang <amwang@redhat.com> Acked-by: Venkat Venkatsubra <venkat.x.venkatsubra@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-03-04tile: properly use COMPAT_SYSCALL_DEFINExChris Metcalf
This was pointed out by Al Viro. Using the correct wrappers properly does sign extension as necessary on syscall arguments. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-03-04random: fix locking dependency with the tasklist_lockTheodore Ts'o
Commit 6133705494bb introduced a circular lock dependency because posix_cpu_timers_exit() is called by release_task(), which is holding a writer lock on tasklist_lock, and this can cause a deadlock since kill_fasync() gets called with nonblocking_pool.lock taken. There's no reason why kill_fasync() needs to be taken while the random pool is locked, so move it out to fix this locking dependency. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reported-by: Russ Dill <Russ.Dill@gmail.com> Cc: stable@kernel.org
2013-03-04DRM/i915: On G45 enable cursor plane briefly after enabling the display plane.Egbert Eich
On G45 some low res modes (800x600 and 1024x768) produce a blank screen when the display plane is enabled with with cursor plane off. Experiments showed that this issue occurred when the following conditions were met: a. a previous mode had the cursor plane enabled (Xserver). b. this mode or the previous one was using self refresh. (Thus the problem was only seen with low res modes). The screens lit up as soon as the cursor plane got enabled. Therefore the blank screen occurred only in console mode, not when running an Xserver. It also seemed to be necessary to disable self refresh while briefly enabling the cursor plane. Signed-off-by: Egbert Eich <eich@suse.com> Bugzilla: https://bugs.freedesktop.org/attachment.cgi?bugid=61457 Acked-by: Chris Wilson <chris@chris-wilson.co.uk> [danvet: drop spurious whitespace change.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-03-04tile: work around bug in the generic sys_llseekChris Metcalf
sys_llseek should specify the high and low 32-bit seek values as "unsigned int" but instead it specifies "unsigned long". Since compat syscall arguments are always sign-extended on tile, this means that a seek value of 0xffffffff will be incorrectly interpreted as a value of -1ULL. To avoid the risk of breaking binary compatibility on architectures that already use sys_llseek this way, we follow the same path as MIPS and provide a wrapper override. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Cc: stable@kernel.org [v3.6 onwards]
2013-03-04ALSA: seq: seq_oss_event: missing range checksDan Carpenter
The "dev" variable could be out of bounds. Calling snd_seq_oss_synth_is_valid() checks that it is is a valid device which has been opened. We check this inside set_note_event() so this function can't succeed without a valid "dev". But we need to do the check earlier to prevent invalid dereferences and memory corruption. One call tree where "dev" could be out of bounds is: -> snd_seq_oss_oob_user() -> snd_seq_oss_process_event() -> extended_event() -> note_on_event() Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-04ACPI / glue: Drop .find_bridge() callback from struct acpi_bus_typeRafael J. Wysocki
After PCI and USB have stopped using the .find_bridge() callback in struct acpi_bus_type, the only remaining user of it is SATA, but SATA only pretends to be a user, because it points that callback to a stub always returning -ENODEV. For this reason, drop the SATA's dummy .find_bridge() callback and remove .find_bridge(), which is not used any more, from struct acpi_bus_type entirely. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Yinghai Lu <yinghai@kernel.org> Acked-by: Jeff Garzik <jgarzik@pobox.com>
2013-03-04ACPI / glue: Add .match() callback to struct acpi_bus_typeRafael J. Wysocki
USB uses the .find_bridge() callback from struct acpi_bus_type incorrectly, because as a result of the way it is used by USB every device in the system that doesn't have a bus type or parent is passed to usb_acpi_find_device() for inspection. What USB actually needs, though, is to call usb_acpi_find_device() for USB ports that don't have a bus type defined, but have usb_port_device_type as their device type, as well as for USB devices. To fix that replace the struct bus_type pointer in struct acpi_bus_type used for matching devices to specific subsystems with a .match() callback to be used for this purpose and update the users of struct acpi_bus_type, including USB, accordingly. Define the .match() callback routine for USB, usb_acpi_bus_match(), in such a way that it will cover both USB devices and USB ports and remove the now redundant .find_bridge() callback pointer from usb_acpi_bus. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Yinghai Lu <yinghai@kernel.org> Acked-by: Jeff Garzik <jgarzik@pobox.com>
2013-03-04ACPI / porocessor: Beautify code, pr->id is u32 which is never < 0Chen Gang
pr->id is u32 which never < 0, so remove the redundant pr->id < 0 check from acpi_processor_add(). [rjw: Changelog] Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-03-04ACPI / processor: Remove redundant NULL check before kfreeSyam Sidhardhan
kfree() on a NULL pointer is a no-op, so remove a redundant NULL pointer check in map_mat_entry(). [rjw: Changelog] Signed-off-by: Syam Sidhardhan <s.syam@samsung.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-03-04ACPI / Sleep: Avoid interleaved message on errorsJoe Perches
Got this dmesg log on an Acer Aspire 725. [ 0.256351] ACPI: (supports S0ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S1_] (20130117/hwxface-568) [ 0.256373] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S2_] (20130117/hwxface-568) [ 0.256391] S3 S4 S5) Avoid this interleaving error messages. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-03-04PM / QoS: Remove device PM QoS sysfs attributes at the right placeRafael J. Wysocki
Device PM QoS sysfs attributes, if present during device removal, are removed from within device_pm_remove(), which is too late, since dpm_sysfs_remove() has already removed the whole attribute group they belonged to. However, moving the removal of those attributes to dpm_sysfs_remove() alone is not sufficient, because in theory they still can be re-added right after being removed by it (the device's driver is still bound to it at that point). For this reason, move the entire desctruction of device PM QoS constraints to dpm_sysfs_remove() and make it prevent any new constraints from being added after it has run. Also, move the initialization of the power.qos field in struct device to device_pm_init_common() and drop the no longer needed dev_pm_qos_constraints_init(). Reported-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-03-04PM / QoS: Fix concurrency issues and memory leaks in device PM QoSRafael J. Wysocki
The current device PM QoS code assumes that certain functions will never be called in parallel with each other (for example, it is assumed that dev_pm_qos_expose_flags() won't be called in parallel with dev_pm_qos_hide_flags() for the same device and analogously for the latency limit), which may be overly optimistic. Moreover, dev_pm_qos_expose_flags() and dev_pm_qos_expose_latency_limit() leak memory in error code paths (req needs to be freed on errors) and __dev_pm_qos_drop_user_request() forgets to free the request. To fix the above issues put more things under the device PM QoS mutex to make them mutually exclusive and add the missing freeing of memory. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-03-04cpufreq: highbank: do not initialize array with a loopEmilio López
As uninitialized array members will be initialized to zero, we can avoid using a for loop by setting a value to it. Signed-off-by: Emilio López <emilio@elopez.com.ar> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-By: Mark Langsdorf <mark.langsdorf@calxeda.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-03-04PM / OPP: improve introductory documentationNishanth Menon
Make Operating Performance Points (OPP) library introductory chapter a little more reader-friendly. Split the chapter into two sections, highlight the definition with an example and minor rewording to be verbose. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Nishanth Menon <nm@ti.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-03-04cpufreq: Fix a typo in commentNamhyung Kim
Fix a typo in a comment in cpufreq_governor.h. [rjw: Changelog] Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-03-04mailbox, pl320-ipc: remove __init from probe functionMark Langsdorf
Avoids a section mismatch. Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-03-04metag: Inhibit NUMA balancing.Paul Mundt
The metag NUMA implementation follows the SH model, using different nodes for memories with different latencies. As such, we ensure that automated balancing between nodes is inhibited, by way of the new ARCH_WANT_VARIABLE_LOCALITY. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: James Hogan <james.hogan@imgtec.com>
2013-03-04metag: remove SET_PERSONALITY()James Hogan
Commit e72837e3e7bae3f182c4ac63c9424e86f1158dd0 ("default SET_PERSONALITY() in linux/elf.h"). The above commit moved the common definition of SET_PERSONALITY() in a bunch of the arch headers to linux/elf.h. Metag shares that common definition so remove it from arch/metag/include/asm/elf.h too. Signed-off-by: James Hogan <james.hogan@imgtec.com>
2013-03-03eCryptfs: allow userspace messaging to be disabledKees Cook
When the userspace messaging (for the less common case of userspace key wrap/unwrap via ecryptfsd) is not needed, allow eCryptfs to build with it removed. This saves on kernel code size and reduces potential attack surface by removing the /dev/ecryptfs node. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
2013-03-03hwmon: (sht15) Check return value of regulator_enable()Mark Brown
Not having power is a pretty serious error so check that we are able to enable the supply and error out if we can't. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@vger.kernel.org #3.8+; 3.0+ will need manual backport Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-03-03hwmon: (adt7410) Document ADT7420 supportJean Delvare
The adt7410 driver supports the ADT7420, but its documentation file makes no mention of that. Add this refrence, and a brief a description of the differences between the ADT7410 and the ADT7420. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2013-03-03hwmon: (pmbus/ltc2978) Use detected chip ID to select supported functionalityGuenter Roeck
We read the chip ID from the chip, use it to determine if the chip ID provided to the driver is correct, and report it if wrong. We should also use the correct chip ID to select supported functionality. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: stable@vger.kernel.org # 3.2+ Acked-by: Jean Delvare <khali@linux-fr.org>
2013-03-03hwmon: (pmbus/ltc2978) Fix peak attribute handlingGuenter Roeck
Peak attributes were not initialized and cleared correctly. Also, temp2_max is only supported on page 0 and thus does not need to be an array. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Cc: stable@vger.kernel.org # 3.2+ Acked-by: Jean Delvare <khali@linux-fr.org>
2013-03-03hwmon: (pmbus/ltc2978) Update datasheet linksGuenter Roeck
Links to datasheets are no longer valid. Provide links to product information instead (which provides links to the datasheets and is hopefully more persistent). Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jean Delvare <khali@linux-fr.org>
2013-03-03hwmon: Update my e-mail address in driver documentationGuenter Roeck
Most of the hwmon driver documentation still listed my old invalid e-mail address. Fix it. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jean Delvare <khali@linux-fr.org>
2013-03-03fs: Limit sys_mount to only request filesystem modules.Eric W. Biederman
Modify the request_module to prefix the file system type with "fs-" and add aliases to all of the filesystems that can be built as modules to match. A common practice is to build all of the kernel code and leave code that is not commonly needed as modules, with the result that many users are exposed to any bug anywhere in the kernel. Looking for filesystems with a fs- prefix limits the pool of possible modules that can be loaded by mount to just filesystems trivially making things safer with no real cost. Using aliases means user space can control the policy of which filesystem modules are auto-loaded by editing /etc/modprobe.d/*.conf with blacklist and alias directives. Allowing simple, safe, well understood work-arounds to known problematic software. This also addresses a rare but unfortunate problem where the filesystem name is not the same as it's module name and module auto-loading would not work. While writing this patch I saw a handful of such cases. The most significant being autofs that lives in the module autofs4. This is relevant to user namespaces because we can reach the request module in get_fs_type() without having any special permissions, and people get uncomfortable when a user specified string (in this case the filesystem type) goes all of the way to request_module. After having looked at this issue I don't think there is any particular reason to perform any filtering or permission checks beyond making it clear in the module request that we want a filesystem module. The common pattern in the kernel is to call request_module() without regards to the users permissions. In general all a filesystem module does once loaded is call register_filesystem() and go to sleep. Which means there is not much attack surface exposed by loading a filesytem module unless the filesystem is mounted. In a user namespace filesystems are not mounted unless .fs_flags = FS_USERNS_MOUNT, which most filesystems do not set today. Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Acked-by: Kees Cook <keescook@chromium.org> Reported-by: Kees Cook <keescook@google.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2013-03-03userns: Stop oopsing in key_change_session_keyringEric W. Biederman
Dave Jones <davej@redhat.com> writes: > Just hit this on Linus' current tree. > > [ 89.621770] BUG: unable to handle kernel NULL pointer dereference at 00000000000000c8 > [ 89.623111] IP: [<ffffffff810784b0>] commit_creds+0x250/0x2f0 > [ 89.624062] PGD 122bfd067 PUD 122bfe067 PMD 0 > [ 89.624901] Oops: 0000 [#1] PREEMPT SMP > [ 89.625678] Modules linked in: caif_socket caif netrom bridge hidp 8021q garp stp mrp rose llc2 af_rxrpc phonet af_key binfmt_misc bnep l2tp_ppp can_bcm l2tp_core pppoe pppox can_raw scsi_transport_iscsi ppp_generic slhc nfnetlink can ipt_ULOG ax25 decnet irda nfc rds x25 crc_ccitt appletalk atm ipx p8023 psnap p8022 llc lockd sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_conntrack nf_conntrack ip6table_filter ip6_tables btusb bluetooth snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_pcm vhost_net snd_page_alloc snd_timer tun macvtap usb_debug snd rfkill microcode macvlan edac_core pcspkr serio_raw kvm_amd soundcore kvm r8169 mii > [ 89.637846] CPU 2 > [ 89.638175] Pid: 782, comm: trinity-main Not tainted 3.8.0+ #63 Gigabyte Technology Co., Ltd. GA-MA78GM-S2H/GA-MA78GM-S2H > [ 89.639850] RIP: 0010:[<ffffffff810784b0>] [<ffffffff810784b0>] commit_creds+0x250/0x2f0 > [ 89.641161] RSP: 0018:ffff880115657eb8 EFLAGS: 00010207 > [ 89.641984] RAX: 00000000000003e8 RBX: ffff88012688b000 RCX: 0000000000000000 > [ 89.643069] RDX: 0000000000000000 RSI: ffffffff81c32960 RDI: ffff880105839600 > [ 89.644167] RBP: ffff880115657ed8 R08: 0000000000000000 R09: 0000000000000000 > [ 89.645254] R10: 0000000000000001 R11: 0000000000000246 R12: ffff880105839600 > [ 89.646340] R13: ffff88011beea490 R14: ffff88011beea490 R15: 0000000000000000 > [ 89.647431] FS: 00007f3ac063b740(0000) GS:ffff88012b200000(0000) knlGS:0000000000000000 > [ 89.648660] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > [ 89.649548] CR2: 00000000000000c8 CR3: 0000000122bfc000 CR4: 00000000000007e0 > [ 89.650635] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ 89.651723] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > [ 89.652812] Process trinity-main (pid: 782, threadinfo ffff880115656000, task ffff88011beea490) > [ 89.654128] Stack: > [ 89.654433] 0000000000000000 ffff8801058396a0 ffff880105839600 ffff88011beeaa78 > [ 89.655769] ffff880115657ef8 ffffffff812c7d9b ffffffff82079be0 0000000000000000 > [ 89.657073] ffff880115657f28 ffffffff8106c665 0000000000000002 ffff880115657f58 > [ 89.658399] Call Trace: > [ 89.658822] [<ffffffff812c7d9b>] key_change_session_keyring+0xfb/0x140 > [ 89.659845] [<ffffffff8106c665>] task_work_run+0xa5/0xd0 > [ 89.660698] [<ffffffff81002911>] do_notify_resume+0x71/0xb0 > [ 89.661581] [<ffffffff816c9a4a>] int_signal+0x12/0x17 > [ 89.662385] Code: 24 90 00 00 00 48 8b b3 90 00 00 00 49 8b 4c 24 40 48 39 f2 75 08 e9 83 00 00 00 48 89 ca 48 81 fa 60 29 c3 81 0f 84 41 fe ff ff <48> 8b 8a c8 00 00 00 48 39 ce 75 e4 3b 82 d0 00 00 00 0f 84 4b > [ 89.667778] RIP [<ffffffff810784b0>] commit_creds+0x250/0x2f0 > [ 89.668733] RSP <ffff880115657eb8> > [ 89.669301] CR2: 00000000000000c8 > > My fastest trinity induced oops yet! > > > Appears to be.. > > if ((set_ns == subset_ns->parent) && > 850: 48 8b 8a c8 00 00 00 mov 0xc8(%rdx),%rcx > > from the inlined cred_cap_issubset By historical accident we have been reading trying to set new->user_ns from new->user_ns. Which is totally silly as new->user_ns is NULL (as is every other field in new except session_keyring at that point). The intent is clearly to copy all of the fields from old to new so copy old->user_ns into into new->user_ns. Cc: stable@vger.kernel.org Reported-by: Dave Jones <davej@redhat.com> Tested-by: Dave Jones <davej@redhat.com> Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2013-03-04drm/nv50-: prevent some races between modesetting and page flippingBen Skeggs
nexuiz-glx + gnome-shell is able to trigger this a lot of the time. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2013-03-04drm/nouveau/i2c: drop parent refcount when creating portsBen Skeggs
Fixes issue where i2c subdev never gets destroyed due to its subobjects holding references. This will mean the i2c subdev refcount goes negative during its destruction, but this isn't an issue in practice. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2013-03-04drm/nv84: fix regression in page flippingBen Skeggs
Need to emit the semaphore ctxdma before trying to use the semaphore operations. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2013-03-04drm/nouveau: Fix typo in init_idx_addr_latched().Francisco Jerez
Fixes script-based modesetting on some LVDS panels. Signed-off-by: Francisco Jerez <currojerez@riseup.net> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2013-03-04drm/nouveau: Disable AGP on PowerPC again.Francisco Jerez
Signed-off-by: Francisco Jerez <currojerez@riseup.net> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
generated by cgit (git 2.34.1) at 2025-07-16 13:07:50 +0000