| Commit message (Collapse) | Author | Age | Files | Lines |
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This is required for instruction emulation to move to userspace.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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This is preparation for userspace handling MMIO and ioport accesses.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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We use the ptrace API struct, and we currently don't let them set
anything but the normal registers (we'd have to filter the others).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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defined.
The VIRTIO_F_ANY_LAYOUT and VIRTIO_F_NOTIFY_ON_EMPTY features are pre-1.0
only.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
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This allows modern implementations to ensure they don't use legacy
feature bits or SCSI commands (which are not used in v1.0 non-legacy).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
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This provides backdoor access to the device MMIOs, and every device should
have one. From the virtio 1.0 spec (CS03):
4.1.4.7.1 Device Requirements: PCI configuration access capability
The device MUST present at least one VIRTIO_PCI_CAP_PCI_CFG capability.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
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This patch add a support for second version of the virtio-mmio device,
which follows OASIS "Virtual I/O Device (VIRTIO) Version 1.0"
specification.
Main changes:
1. The control register symbolic names use the new device/driver
nomenclature rather than the old guest/host one.
2. The driver detect the device version (version 1 is the pre-OASIS
spec, version 2 is compatible with fist revision of the OASIS spec)
and drives the device accordingly.
3. New version uses direct addressing (64 bit address split into two
low/high register) instead of the guest page size based one,
and addresses each part of the queue (descriptors, available, used)
separately.
4. The device activity is now explicitly triggered by writing to the
"queue ready" register.
5. Whole 64 bit features are properly handled now (both ways).
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Most of our code has
struct foo {
}
Fix two instances where balloon is inconsistent.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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QEMU wants it, so why not? Trust, but verify.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Lightly tested against qemu.
One thing *not* implemented here is separate mappings
for descriptor/avail/used rings. That's nice to have,
will be done later after we have core support.
This also exposes the PCI layout to userspace, and
adds macros for PCI layout offsets:
QEMU wants it, so why not? Trust, but verify.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Based on patches by Michael S. Tsirkin <mst@redhat.com>, but I found it
hard to follow so changed to use structures which are more
self-documenting.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Virtio drivers should map the part of the BAR they need, not necessarily
all of it.
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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virtio_pci does not depend on virtio_config:
let's not include it, users can pull it in as necessary.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
- Bartlomiej will be co-maintaining PATA portion of libata. git
workflow will stay the same.
- sata_sil24 wasn't happy with tag ordered submission. An option to
restore the old tag allocation behavior is implemented for sil24.
- a very old race condition in PIO host state machine which can trigger
BUG fixed.
- other driver-specific changes
* 'for-3.19-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
libata: prevent HSM state change race between ISR and PIO
libata: allow sata_sil24 to opt-out of tag ordered submission
ata: pata_at91: depend on !ARCH_MULTIPLATFORM
ahci: Remove Device ID for Intel Sunrise Point PCH
ahci: Use dev_info() to inform about the lack of Device Sleep support
libata: Whitelist SSDs that are known to properly return zeroes after TRIM
sata_dwc_460ex: fix resource leak on error path
ata: add MAINTAINERS entry for libata PATA drivers
libata: clean up MAINTAINERS entries
libata: export ata_get_cmd_descript()
ahci_xgene: Fix the DMA state machine lockup for the ATA_CMD_PACKET PIO mode command.
ahci_xgene: Fix the endianess issue in APM X-Gene SoC AHCI SATA controller driver.
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Ronny reports: https://bugzilla.kernel.org/show_bug.cgi?id=87101
"Since commit 8a4aeec8d "libata/ahci: accommodate tag ordered
controllers" the access to the harddisk on the first SATA-port is
failing on its first access. The access to the harddisk on the
second port is working normal.
When reverting the above commit, access to both harddisks is working
fine again."
Maintain tag ordered submission as the default, but allow sata_sil24 to
continue with the old behavior.
Cc: <stable@vger.kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Reported-by: Ronny Hegewald <Ronny.Hegewald@online.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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As defined, the DRAT (Deterministic Read After Trim) and RZAT (Return
Zero After Trim) flags in the ATA Command Set are unreliable in the
sense that they only define what happens if the device successfully
executed the DSM TRIM command. TRIM is only advisory, however, and the
device is free to silently ignore all or parts of the request.
In practice this renders the DRAT and RZAT flags completely useless and
because the results are unpredictable we decided to disable discard in
MD for 3.18 to avoid the risk of data corruption.
Hardware vendors in the real world obviously need better guarantees than
what the standards bodies provide. Unfortuntely those guarantees are
encoded in product requirements documents rather than somewhere we can
key off of them programatically. So we are compelled to disabling
discard_zeroes_data for all devices unless we explicitly have data to
support whitelisting them.
This patch whitelists SSDs from a few of the main vendors. None of the
whitelists are based on written guarantees. They are purely based on
empirical evidence collected from internal and external users that have
tested or qualified these drives in RAID deployments.
The whitelist is only meant as a starting point and is by no means
comprehensive:
- All intel SSD models except for 510
- Micron M5?0/M600
- Samsung SSDs
- Seagate SSDs
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
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Pull networking fixes from David Miller:
1) Socket addresses returned in the error queue need to be fully
initialized before being passed on to userspace, fix from Willem de
Bruijn.
2) Interrupt handling fixes to davinci_emac driver from Tony Lindgren.
3) Fix races between receive packet steering and cpu hotplug, from Eric
Dumazet.
4) Allowing netlink sockets to subscribe to unknown multicast groups
leads to crashes, don't allow it. From Johannes Berg.
5) One to many socket races in SCTP fixed by Daniel Borkmann.
6) Put in a guard against the mis-use of ipv6 atomic fragments, from
Hagen Paul Pfeifer.
7) Fix promisc mode and ethtool crashes in sh_eth driver, from Ben
Hutchings.
8) NULL deref and double kfree fix in sxgbe driver from Girish K.S and
Byungho An.
9) cfg80211 deadlock fix from Arik Nemtsov.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (36 commits)
s2io: use snprintf() as a safety feature
r8152: remove sram_read
r8152: remove generic_ocp_read before writing
bgmac: activate irqs only if there is nothing to poll
bgmac: register napi before the device
sh_eth: Fix ethtool operation crash when net device is down
sh_eth: Fix promiscuous mode on chips without TSU
ipv6: stop sending PTB packets for MTU < 1280
net: sctp: fix race for one-to-many sockets in sendmsg's auto associate
genetlink: synchronize socket closing and family removal
genetlink: disallow subscribing to unknown mcast groups
genetlink: document parallel_ops
net: rps: fix cpu unplug
net: davinci_emac: Add support for emac on dm816x
net: davinci_emac: Fix ioremap for devices with MDIO within the EMAC address space
net: davinci_emac: Fix incomplete code for getting the phy from device tree
net: davinci_emac: Free clock after checking the frequency
net: davinci_emac: Fix runtime pm calls for davinci_emac
net: davinci_emac: Fix hangs with interrupts
ip: zero sockaddr returned on error queue
...
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In addition to the problem Jeff Layton reported, I looked at the code
and reproduced the same warning by subscribing and removing the genl
family with a socket still open. This is a fairly tricky race which
originates in the fact that generic netlink allows the family to go
away while sockets are still open - unlike regular netlink which has
a module refcount for every open socket so in general this cannot be
triggered.
Trying to resolve this issue by the obvious locking isn't possible as
it will result in deadlocks between unregistration and group unbind
notification (which incidentally lockdep doesn't find due to the home
grown locking in the netlink table.)
To really resolve this, introduce a "closing socket" reference counter
(for generic netlink only, as it's the only affected family) in the
core netlink code and use that in generic netlink to wait for all the
sockets that are being closed at the same time as a generic netlink
family is removed.
This fixes the race that when a socket is closed, it will should call
the unbind, but if the family is removed at the same time the unbind
will not find it, leading to the warning. The real problem though is
that in this case the unbind could actually find a new family that is
registered to have a multicast group with the same ID, and call its
mcast_unbind() leading to confusing.
Also remove the warning since it would still trigger, but is now no
longer a problem.
This also moves the code in af_netlink.c to before unreferencing the
module to avoid having the same problem in the normal non-genl case.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The kernel-doc for the parallel_ops family struct member is
missing, add it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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During the CAN FD standardization process within the ISO it turned out that
the failure detection capability has to be improved.
The CAN in Automation organization (CiA) defined the already implemented CAN
FD controllers as 'non-ISO' and the upcoming improved CAN FD controllers as
'ISO' compliant. See at http://www.can-cia.com/index.php?id=1937
Finally there will be three types of CAN FD controllers in the future:
1. ISO compliant (fixed)
2. non-ISO compliant (fixed, like the M_CAN IP v3.0.1 in m_can.c)
3. ISO/non-ISO CAN FD controllers (switchable, like the PEAK USB FD)
So the current M_CAN driver for the M_CAN IP v3.0.1 has to expose its non-ISO
implementation by setting the CAN_CTRLMODE_FD_NON_ISO ctrlmode at startup.
As this bit cannot be switched at configuration time CAN_CTRLMODE_FD_NON_ISO
must not be set in ctrlmode_supported of the current M_CAN driver.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input subsystem fixes from Dmitry Torokhov.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: uinput - fix ioctl nr overflow for UI_GET_SYSNAME/VERSION
Input: I8042 - add Acer Aspire 7738 to the nomux list
Input: elantech - support new ICs types for version 4
Input: i8042 - reset keyboard to fix Elantech touchpad detection
MAINTAINERS: remove Dmitry Torokhov's alternate address
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Request number for ioctls are encoded as 8bit numbers, but unfortunately
UI_GET_SYSNAME and UI_GET_VERSION specifu values larger than that, so they
get truncated to 44 (0x2c) and 45 (0x2d). This change makes requested
values match their effective values (the ABI stays intact).
Signed-off-by: Gabriel Laskar <gabriel@lse.epita.fr>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here is a bunch of USB fixes for 3.19-rc5.
Most of these are gadget driver fixes, along with the xhci driver fix
that we both reported having problems with, as well as some new device
ids and other tiny fixes.
All have been in linux-next with no problems"
* tag 'usb-3.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (43 commits)
usb: dwc3: gadget: Stop TRB preparation after limit is reached
usb: dwc3: gadget: Fix TRB preparation during SG
usb: phy: mv-usb: fix usb_phy build errors
usb: serial: handle -ENODEV quietly in generic_submit_read_urb
usb: serial: silence all non-critical read errors
USB: console: fix potential use after free
USB: console: fix uninitialised ldisc semaphore
usb: gadget: udc: atmel: fix possible oops when unloading module
usb: gadget: gadgetfs: fix an oops in ep_write()
usb: phy: Fix deferred probing
OHCI: add a quirk for ULi M5237 blocking on reset
uas: Add US_FL_NO_ATA_1X for 2 more Seagate disk enclosures
uas: Do not blacklist ASM1153 disk enclosures
usb: gadget: udc: avoid dereference before NULL check in ep_queue
usb: host: ehci-tegra: request deferred probe when failing to get phy
uas: disable UAS on Apricorn SATA dongles
uas: Add US_FL_NO_REPORT_OPCODES for JMicron JMS566 with usb-id 0bc2:a013
uas: Add US_FL_NO_ATA_1X for Seagate devices with usb-id 0bc2:a013
xhci: Add broken-streams quirk for Fresco Logic FL1000G xhci controllers
USB: EHCI: adjust error return code
...
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git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus
Johan writes:
USB-serial fixes for v3.18-rc5
Here are a few fixes for reported problems including a possible
null-deref on probe with keyspan, a misbehaving modem, and a couple of
issues with the USB console.
Some new device IDs are also added.
Signed-off-by: Johan Hovold <johan@kernel.org>
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Prior to DRA74x silicon rev 1.1, pcie_pcs register bits 8-15 and bits 16-23
were used to configure RC delay count for phy1 and phy2 respectively.
phyid was used as index to distinguish the phys and to configure the delay
values appropriately.
As of DRA74x silicon rev 1.1, pcie_pcs register definition has changed.
Bits 16-23 are used to configure delay values for *both* phy1 and phy2.
Hence phyid is no longer required.
So, drop id field from ti_pipe3 structure and its subsequent references
for configuring pcie_pcs register.
Also, pcie_pcs register now needs to be configured with delay value of 0x96
at bit positions 16-23. See register description of CTRL_CORE_PCIE_PCS in
ARM572x TRM, SPRUHZ6, October 2014, section 18.5.2.2, table 18-1804.
This is needed to ensure Gen2 cards are enumerated consistently.
DRA72x silicon behaves same way as DRA74x rev 1.1 as far as this functionality
is considered.
Test results on DRA74x and DRA72x EVMs:
Before patch
------------
DRA74x ES 1.0: Gen1 cards work, Gen2 cards do not work (expected result due to
silicon errata)
DRA74x ES 1.1: Gen1 cards work, Gen2 cards do not work sometimes due to incorrect
programming of register
DRA72x: Gen1 cards work, Gen2 cards do not work sometimes due to incorrect
programming of register
After patch
-----------
DRA74x ES 1.0: Gen1 cards work, Gen2 cards do not work (expected result due to
silicon errata)
DRA74x ES 1.1: Gen1 cards work, Gen2 cards work consistently.
DRA72x: Gen1 and Gen2 cards enumerate consistently.
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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Pull NFS client bugfixes from Trond Myklebust:
"Highlights include:
- Stable fix for a NFSv3/lockd race
- Fixes for several NFSv4.1 client id trunking bugs
- Remove an incorrect test when checking for delegated opens"
* tag 'nfs-for-3.19-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFSv4: Remove incorrect check in can_open_delegated()
NFS: Ignore transport protocol when detecting server trunking
NFSv4/v4.1: Verify the client owner id during trunking detection
NFSv4: Cache the NFSv4/v4.1 client owner_id in the struct nfs_client
NFSv4.1: Fix client id trunking on Linux
LOCKD: Fix a race when initialising nlmsvc_timeout
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Ensure that we cache the NFSv4/v4.1 client owner_id so that we can
verify it when we're doing trunking detection.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Pull networking fixes from David Miller:
1) Don't use uninitialized data in IPVS, from Dan Carpenter.
2) conntrack race fixes from Pablo Neira Ayuso.
3) Fix TX hangs with i40e, from Jesse Brandeburg.
4) Fix budget return from poll calls in dnet and alx, from Eric
Dumazet.
5) Fix bugus "if (unlikely(x) < 0)" test in AF_PACKET, from Christoph
Jaeger.
6) Fix bug introduced by conversion to list_head in TIPC retransmit
code, from Jon Paul Maloy.
7) Don't use GFP_NOIO under spinlock in USB kaweth driver, from Alexey
Khoroshilov.
8) Fix bridge build with INET disabled, from Arnd Bergmann.
9) Fix netlink array overrun for PROBE attributes in openvswitch, from
Thomas Graf.
10) Don't hold spinlock across synchronize_irq() in tg3 driver, from
Prashant Sreedharan.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (44 commits)
tg3: Release tp->lock before invoking synchronize_irq()
tg3: tg3_reset_task() needs to use rtnl_lock to synchronize
tg3: tg3_timer() should grab tp->lock before checking for tp->irq_sync
team: avoid possible underflow of count_pending value for notify_peers and mcast_rejoin
openvswitch: packet messages need their own probe attribtue
i40e: adds FCoE configure option
cxgb4vf: Fix queue allocation for 40G adapter
netdevice: Add missing parentheses in macro
bridge: only provide proxy ARP when CONFIG_INET is enabled
neighbour: fix base_reachable_time(_ms) not effective immediatly when changed
net: fec: fix MDIO bus assignement for dual fec SoC's
xen-netfront: use different locks for Rx and Tx stats
drivers: net: cpsw: fix multicast flush in dual emac mode
cxgb4vf: Initialize mdio_addr before using it
net: Corrected the comment describing the ndo operations to reflect the actual prototype for couple of operations
usb/kaweth: use GFP_ATOMIC under spin_lock in usb_start_wait_urb()
MAINTAINERS: add me as ibmveth maintainer
tipc: fix bug in broadcast retransmit code
update ip-sysctl.txt documentation (v2)
net/at91_ether: prepare and unprepare clock
...
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User space is currently sending a OVS_FLOW_ATTR_PROBE for both flow
and packet messages. This leads to an out-of-bounds access in
ovs_packet_cmd_execute() because OVS_FLOW_ATTR_PROBE >
OVS_PACKET_ATTR_MAX.
Introduce a new OVS_PACKET_ATTR_PROBE with the same numeric value
as OVS_FLOW_ATTR_PROBE to grow the range of accepted packet attributes
while maintaining to be binary compatible with existing OVS binaries.
Fixes: 05da589 ("openvswitch: Add support for OVS_FLOW_ATTR_PROBE.")
Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Tracked-down-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Reviewed-by: Jesse Gross <jesse@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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For example, one could conceivably call
for_each_netdev_in_bond_rcu(condition ? bond1 : bond2, slave)
and get an unexpected result.
Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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actual prototype for couple of operations
Corrected the comment describing the ndo operations to
reflect the actual prototype for couple of operations
Signed-off-by: B Viswanath <marichika4@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull block layer fixes from Jens Axboe:
"The major part is an update to the NVMe driver, fixing various issues
around surprise removal and hung controllers. Most of that is from
Keith, and parts are simple blk-mq fixes or exports/additions of minor
functions to aid this effort, and parts are changes directly to the
NVMe driver.
Apart from the above, this contains:
- Small blk-mq change from me, killing an unused member of the
hardware queue structure.
- Small fix from Ming Lei, fixing up a few drivers that didn't
properly check for ERR_PTR() returns from blk_mq_init_queue()"
* 'for-linus' of git://git.kernel.dk/linux-block:
NVMe: Fix locking on abort handling
NVMe: Start and stop h/w queues on reset
NVMe: Command abort handling fixes
NVMe: Admin queue removal handling
NVMe: Reference count admin queue usage
NVMe: Start all requests
blk-mq: End unstarted requests on a dying queue
blk-mq: Allow requests to never expire
blk-mq: Add helper to abort requeued requests
blk-mq: Let drivers cancel requeue_work
blk-mq: Export if requests were started
blk-mq: Wake tasks entering queue on dying
blk-mq: get rid of ->cmd_size in the hardware queue
block: fix checking return value of blk_mq_init_queue
block: wake up waiters when a queue is marked dying
NVMe: Fix double free irq
blk-mq: Export freeze/unfreeze functions
blk-mq: Exit queue on alloc failure
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Some types of requests may be started that are not gauranteed to ever
complete. This adds a request flag that a driver can use so mark the
request as such.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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Adds a helper function a driver can use to abort requeued requests in
case any are pending when h/w queues are being removed.
Signed-off-by: Jens Axboe <axboe@fb.com>
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Kicking requeued requests will start h/w queues in a work_queue, which
may alter the driver's requested state to temporarily stop them. This
patch exports a method to cancel the q->requeue_work so a driver can be
assured stopped h/w queues won't be started up before it is ready.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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Drivers can iterate over all allocated request tags, but their callback
needs a way to know if the driver started the request in the first place.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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We store it in the tag set, we don't need it in the hardware queue.
While removing cmd_size, place ->queue_num further down to avoid
a hole on 64-bit archs. It's not used in any fast paths, so we
can safely move it.
Signed-off-by: Jens Axboe <axboe@fb.com>
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Let drivers prevent entering a queue that isn't available.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux
Pull WRITE_ONCE argument order change from Christian Borntraeger:
"As discussed on LKML[1] it was agreed that WRITE_ONCE(x, val) is
better than ASSIGN_ONCE(val, x)
Lets change that for 3.19 as 3.19 has no user yet, but the first users
will hit linux-next soon"
[1] http://marc.info/?l=linux-kernel&m=142081181707596
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux:
kernel: Change ASSIGN_ONCE(val, x) to WRITE_ONCE(x, val)
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Feedback has shown that WRITE_ONCE(x, val) is easier to use than
ASSIGN_ONCE(val,x).
There are no in-tree users yet, so lets change it for 3.19.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen bug fixes from David Vrabel:
"Several critical linear p2m fixes that prevented some hosts from
booting"
* tag 'stable/for-linus-3.19-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
x86/xen: properly retrieve NMI reason
xen: check for zero sized area when invalidating memory
xen: use correct type for physical addresses
xen: correct race in alloc_p2m_pmd()
xen: correct error for building p2m list on 32 bits
x86/xen: avoid freeing static 'name' when kasprintf() fails
x86/xen: add extra memory for remapped frames during setup
x86/xen: don't count how many PFNs are identity mapped
x86/xen: Free bootmem in free_p2m_page() during early boot
x86/xen: Remove unnecessary BUG_ON(preemptible()) in xen_setup_timer()
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Using the native code here can't work properly, as the hypervisor would
normally have cleared the two reason bits by the time Dom0 gets to see
the NMI (if passed to it at all). There's a shared info field for this,
and there's an existing hook to use - just fit the two together. This
is particularly relevant so that NMIs intended to be handled by APEI /
GHES actually make it to the respective handler.
Note that the hook can (and should) be used irrespective of whether
being in Dom0, as accessing port 0x61 in a DomU would be even worse,
while the shared info field would just hold zero all the time. Note
further that hardware NMI handling for PVH doesn't currently work
anyway due to missing code in the hypervisor (but it is expected to
work the native rather than the PV way).
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
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Pull MMC fixes from Ulf Hansson:
"MMC host:
- sdhci-pci|acpi: Support some new IDs
- sdhci: Fix sleep from atomic context
- sdhci-pxav3: Prevent hang during ->probe()
- sdhci: Disable re-tuning for HS400"
* tag 'mmc-v3.19-3' of git://git.linaro.org/people/ulf.hansson/mmc:
mmc: sdhci-pci: Add support for Intel SPT
mmc: sdhci-acpi: Add ACPI HID INT344D
mmc: sdhci: Fix sleep in atomic after inserting SD card
mmc: sdhci-pxav3: do the mbus window configuration after enabling clocks
mmc: sdhci: Disable re-tuning for HS400
mmc: sdhci: Simplify use of tuning timer
mmc: sdhci: Add out_unlock to sdhci_execute_tuning
mmc: sdhci: Tuning should not change max_blk_count
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Re-tuning for HS400 mode must be done in HS200
mode. Currently there is no support for that.
That needs to be reflected in the code.
Specifically, if tuning is executed in HS400 mode
then return an error, and do not start the
tuning timer if HS200 tuning is being done prior
to switching to HS400.
Note that periodic re-tuning is not expected
to be needed for HS400 but re-tuning is still
needed after the host controller has lost power.
In the case of suspend/resume that is not necessary
because the card is fully re-initialised. That
just leaves runtime suspend/resume with no support
for HS400 re-tuning.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Pull scsi target fixes from Nicholas Bellinger:
"Mostly minor fixes this time, including:
- Add missing virtio-scsi -> TCM attribute conversion in vhost-scsi.
- Fix persistent reservations write exclusive handling to allow
readers for all registered I_T nexuses.
- Drop arbitrary maximum I/O size limit in order to process I/Os
larger than 4 MB, required for initiators that don't honor block
limits EVPD.
- Drop the now left-over fabric_max_sectors attribute"
* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
iscsi-target: Fix typos in enum cmd_flags_table
MAINTAINERS: Add entry for iSER target driver
target: Allow Write Exclusive non-reservation holders to READ
target: Drop left-over fabric_max_sectors attribute
target: Drop arbitrary maximum I/O size limit
Documentation/target: Update fabric_ops to latest code
vhost-scsi: Add missing virtio-scsi -> TCM attribute conversion
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Now that fabric_max_sectors is no longer used to enforce the maximum
I/O size, go ahead and drop it's left-over usage in target-core and
associated backend drivers.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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When batching up address ranges for TLB invalidation, we check tlb->end
!= 0 to indicate that some pages have actually been unmapped.
As of commit f045bbb9fa1b ("mmu_gather: fix over-eager
tlb_flush_mmu_free() calling"), we use the same check for freeing these
pages in order to avoid a performance regression where we call
free_pages_and_swap_cache even when no pages are actually queued up.
Unfortunately, the range could have been reset (tlb->end = 0) by
tlb_end_vma, which has been shown to cause memory leaks on arm64.
Furthermore, investigation into these leaks revealed that the fullmm
case on task exit no longer invalidates the TLB, by virtue of tlb->end
== 0 (in 3.18, need_flush would have been set).
This patch resolves the problem by reverting commit f045bbb9fa1b, using
instead tlb->local.nr as the predicate for page freeing in
tlb_flush_mmu_free and ensuring that tlb->end is initialised to a
non-zero value in the fullmm case.
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Dave Hansen <dave@sr71.net>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"Mostly tooling fixes, but also some kernel side fixes: uncore PMU
driver fix, user regs sampling fix and an instruction decoder fix that
unbreaks PEBS precise sampling"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/uncore/hsw-ep: Handle systems with only two SBOXes
perf/x86_64: Improve user regs sampling
perf: Move task_pt_regs sampling into arch code
x86: Fix off-by-one in instruction decoder
perf hists browser: Fix segfault when showing callchain
perf callchain: Free callchains when hist entries are deleted
perf hists: Fix children sort key behavior
perf diff: Fix to sort by baseline field by default
perf list: Fix --raw-dump option
perf probe: Fix crash in dwarf_getcfi_elf
perf probe: Fix to fall back to find probe point in symbols
perf callchain: Append callchains only when requested
perf ui/tui: Print backtrace symbols when segfault occurs
perf report: Show progress bar for output resorting
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On x86_64, at least, task_pt_regs may be only partially initialized
in many contexts, so x86_64 should not use it without extra care
from interrupt context, let alone NMI context.
This will allow x86_64 to override the logic and will supply some
scratch space to use to make a cleaner copy of user regs.
Tested-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: chenggang.qcg@taobao.com
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/e431cd4c18c2e1c44c774f10758527fb2d1025c4.1420396372.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Pull drm fixes from Dave Airlie:
"I'm briefly working between holidays and LCA, so this is close to a
couple of weeks of fixes,
Two sets of amdkfd fixes, this is a new feature this kernel, and this
pull fixes a few issues since it got merged, ordering when built-in to
kernel and also the iommu vs gpu ordering patch, it also reworks the
ioctl before the initial release.
Otherwise:
- radeon: some misc fixes all over, hdmi, 4k, dpm
- nouveau: mcp77 init fixes, oops fix, bug on fix, msi fix
- i915: power fixes, revert VGACNTR patch
Probably be quiteer next week since I'll be at LCA anyways"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (33 commits)
drm/amdkfd: rewrite kfd_ioctl() according to drm_ioctl()
drm/amdkfd: reformat IOCTL definitions to drm-style
drm/amdkfd: Do copy_to/from_user in general kfd_ioctl()
drm/radeon: integer underflow in radeon_cp_dispatch_texture()
drm/radeon: adjust default bapm settings for KV
drm/radeon: properly filter DP1.2 4k modes on non-DP1.2 hw
drm/radeon: fix sad_count check for dce3
drm/radeon: KV has three PPLLs (v2)
drm/amdkfd: unmap VMID<-->PASID when relesing VMID (non-HWS)
drm/radeon: Init amdkfd only if it was compiled
amdkfd: actually allocate longs for the pasid bitmask
drm/nouveau/nouveau: Do not BUG_ON(!spin_is_locked()) on UP
drm/nv4c/mc: disable msi
drm/nouveau/fb/ram/mcp77: enable NISO poller
drm/nouveau/fb/ram/mcp77: use carveout reg to determine size
drm/nouveau/fb/ram/mcp77: subclass nouveau_ram
drm/nouveau: wake up the card if necessary during gem callbacks
drm/nouveau/device: Add support for GK208B, resolves bug 86935
drm/nouveau: fix missing return statement in nouveau_ttm_tt_unpopulate
drm/nouveau/bios: fix oops on pre-nv50 chipsets
...
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