David Laight says:
====================
net: sctp: Optimisations to sctp command queue code
These 3 patches optimise the code that processes sctp's command queue.
(A list of 'tasks' to be performed after the rest of the chunk processing.)
1) Inline all the functions from command.c
2) Remove the memset() calls used to zero a word-sized union.
3) Use pointers instead of array indexes.
The combined changes reduce the code size (amd64) by a few kb.
I'm not 100% convinced that the zeroing done in patch 2 is needed at all.
On BE systems it is likely to generate more code than on LE ones.
In fact it might be best to change the union to only contain 'long' sized
items.
Changes for v2:
- Add some missing initialisers in patch 2/3 and delete them in 3/3.
- Modify the commit message for 2/3 to point out that the union
shouldn't need to be zeroed, but the patches aren't intended to
change the behaviour even if the code is buggy.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Using pointers into sctp_cmd_seq_t.cmds[] lets the compiler generate much
better code.
Use the last entry first to optimise the overflow check.
Signed-off-by: David Laight <david.laight@aculab.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Even if memset() is inlined (as on x86) using it to zero the union
generates a memory word write of zero, followed by a write of the
smaller field, and then a read of the word.
As well as being a lot of instructions the sequence is unlikely to
be optimised by the store-load forward hardware so will be slow.
Instead allocate a field of the union that is the same size as the
entire union and write a zero value to it. The compiler will then
generate the required value in a register.
Zeroing the union shouldn't be necessary, but this patch series isn't
intended to have a behavioural change.
Signed-off-by: David Laight <david.laight@aculab.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
sctp_init_cmd_seq() and sctp_next_cmd() are only called from one place.
The call sequence for sctp_add_cmd_sf() is likely to be longer than
the inlined code.
With sctp_add_cmd_sf() inlined the compiler can optimise repeated calls.
Signed-off-by: David Laight <david.laight@aculab.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This warning is introduced by commit 7b30600cc6 ("appletalk:
fix checkpatch error with indent"), So fix it.
Signed-off-by: Wang Weidong <wangweidong1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch changes the IEEE 802.15.4 subsystem maintainer to Alexander Aring.
We discussed this change before via e-mail and I collected the acks from the
current maintainers.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Acked-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Acked-by: Alexander Smirnov <alex.bluesman.sminov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
John W. Linville says:
====================
pull request: wireless-next 2014-07-03
Please pull this first batch of wireless updates intended for the
3.17 stream...
For the mac80211 bits, Johannes says:
"The biggest thing here is probably Arik's TDLS rework, beyond that we
have smaller improvements and features like David's scanning IE thing,
Luca's queue work, some CSA work, etc. Also your PID rate control
removal, of course."
For the iwlwifi bits, Emmanuel says:
"I have here a whole bunch of various things. Andy contributes
better debug prints for dvm specific flows and a module parameter to
completely disable power save for dvm. Andrei is sharing the premises
of his work on CSA - more to come. Eran and Liad keep on working
on the new devices. I have the regular amount of BT Coex stuff and
I continue to work on the firmware error report system adding more
debug capabilities. More to come on that subject too."
On top of that, there are some cleanups to the new rsi driver, some
continuing improvements to the rtl818x drivers, and the usual bundles
of updates to ath9k, b43, mwifiex, wil6210, and a few other bits here
and there.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
load_pointer() is already a static inline function.
Let's move it into filter.h so BPF JIT implementations can reuse this
function.
Since we're exporting this function, let's also rename it to
bpf_load_pointer() for clarity.
Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Reviewed-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This fixes compiler warnings:
drivers/net/ethernet/amd/declance.c: In function 'lance_init_ring':
drivers/net/ethernet/amd/declance.c:478: warning: format '%8.8x' expects type 'unsigned int', but argument 3 has type 'long unsigned int'
drivers/net/ethernet/amd/declance.c:487: warning: format '%8.8x' expects type 'unsigned int', but argument 3 has type 'long unsigned int'
drivers/net/ethernet/amd/declance.c:503: warning: cast from pointer to integer of different size
drivers/net/ethernet/amd/declance.c:520: warning: cast from pointer to integer of different size
in 64-bit compilation. Where the value printed is an offset (whose range
will always fit) the cast uses a 32-bit type, otherwise, where it is a
host memory address, the pointer is output directly with %p. Also the
remaining `0x' prefix is dropped for consistency across these messages.
Tested with both 32-bit and 64-bit compilation, as well as at the run time
(with the debug messages affected enabled).
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since AI lines could be selected at will (linux-3.11) the sending
and receiving ends of the FIFO does not agree about what step is used
for a line. It only works if the last lines are used, like 5,6,7,
and fails if ie 2,4,6 is selected in DT.
Signed-off-by: Jan Kardell <jan.kardell@telliq.com>
Tested-by: Zubair Lutfullah <zubair.lutfullah@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Cc: stable@vger.kernel.org
Nothing major, but potentially annoying and worthwhile to fix.
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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
"Fix a number of zero-day bugs, mostly found with module test scripts.
Nothing major, but potentially annoying and worthwhile to fix"
* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (adc128d818) Drop write support on inX_input attributes
hwmon: (emc2103) Clamp limits instead of bailing out
hwmon: (adm1031) Fix writes to limit registers
hwmon: (adm1021) Fix cache problem when writing temperature limits
hwmon: (adm1029) Ensure the fan_div cache is updated in set_fan_div
hwmon: (amc6821) Fix permissions for temp2_input
hwmon: (ntc_thermistor) Correct information printed during probe
Arvid Brodin says:
====================
net/hsr: Use list_head+rcu, better frame dispatch, etc.
This patch series is meant to improve the HSR code in several ways:
* Better code readability.
* In general, make the code structure more like the net/bridge code (HSR
operates similarly to a bridge, but uses the HSR-specific frame headers to
break up rings, instead of the STP protocol).
* Better handling of HSR ports' net_device features.
* Use list_head and the _rcu list traversing routines instead of array of slave
devices.
* Make it easy to support HSR Interlink devices (for future Redbox/Quadbox
support).
* Somewhat better throughput on non-HAVE_EFFICIENT_UNALIGNED_ACCESS archs, due
to lesser copying of skb data.
The code has been tested in a ring together with other HSR nodes running
unchanged code, on both avr32 and x86_64. There should only be one minor change
in behaviour from a user perspective:
* Anyone using the Netlink HSR_C_GET_NODE_LIST message to dump the internal
node database will notice that the database now also contains the self node.
All patches pass 'checkpatch.pl --ignore CAMELCASE --max-line-length=83
--strict' with only CHECKs, each of which have been deliberately left in place.
The final code passes sparse checks with no output.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
If none of the slave interfaces are specified, struct nlattr *data[] may
be NULL. Make sure to check for that.
While I'm at it, fix the horrible error messages displayed when only one
of the slave interfaces isn't specified.
Signed-off-by: Arvid Brodin <arvid.brodin@alten.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch removes the separate paths for frames coming from the outside, and
frames sent from the HSR device, and instead makes all frames go through
hsr_forward_skb() in hsr_forward.c. This greatly improves code readability and
also opens up the possibility for future support of the HSR Interlink device
that is the basis for HSR RedBoxes and HSR QuadBoxes, as well as VLAN
compatibility.
Other improvements:
* A reduction in the number of times an skb is copied on machines without
HAVE_EFFICIENT_UNALIGNED_ACCESS, which improves throughput somewhat.
* Headers are now created using the standard eth_header(), and using the
standard hard_header_len.
* Each HSR slave now gets its own private skb, so slave-specific fields can be
correctly set.
Signed-off-by: Arvid Brodin <arvid.brodin@alten.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
Also try to prevent some possible slave dereference race conditions. This is
finalized in the next patch, which abandons the slave array in favour of
a list_head list and list RCU.
Signed-off-by: Arvid Brodin <arvid.brodin@alten.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
Also move the frame receive handler to hsr_slave.c.
Signed-off-by: Arvid Brodin <arvid.brodin@alten.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
When the system is too busy to complete the urb, the tx timout function
would be called. This causes the other tx urbs would be killed, too.
Increase the tx timeout to avoid it.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ic_dev_xid is only used in ipconfig.c
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: netdev@vger.kernel.org
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Vrabel says:
====================
xen-netfront: multi-queue related locking fixes
Two fixes to the per-queue locking bugs in xen-netfront that were
introduced in 3.16-rc1 with the multi-queue support.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
In xennet_disconnect_backend(), netif_carrier_off() was called once
per queue when it needs to only be called once.
The queue locking around the netif_carrier_off() call looked very
odd. I think they were supposed to synchronize any NAPI instances with
the expectation that no further NAPI instances would be scheduled
because of the carrier being off (see the check in
xennet_rx_interrupt()). But I can't easily tell if this works
correctly.
Instead, add a napi_synchronize() call after disabling the interrupts.
This is obviously correct as with no Rx interrupts, no further NAPI
instances will be scheduled.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The nesting of the per-queue rx_lock and tx_lock in xennet_connect()
is confusing to both humans and lockdep. The locking is safe because
this is the only place where the locks are nested in this way but
lockdep still warns.
Instead of adding the missing lockdep annotations, refactor the
locking to avoid the confusing nesting. This is still safe, because
the xenbus connection state changes are all serialized by the xenwatch
thread.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/sched.h implements TASK_SIZE_OF as TASK_SIZE if it
is not set by the architecture headers. TASK_SIZE uses the
current task to determine the size of the virtual address space.
On a 64-bit kernel this will cause reading /proc/pid/pagemap of a
64-bit process from a 32-bit process to return EOF when it reads
past 0xffffffff.
Implement TASK_SIZE_OF exactly the same as TASK_SIZE with
test_tsk_thread_flag instead of test_thread_flag.
Cc: stable@vger.kernel.org
Signed-off-by: Colin Cross <ccross@android.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
The __cpu_clear_user_page() and __cpu_copy_user_page() functions
are not currently exported. This prevents modules from using
clear_user_page() and copy_user_page().
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This patch fixes the dma state machine lockup due to the processing
of IDENTIFY DEVICE PIO mode command. The X-Gene AHCI controller
has an errata in which it cannot clear the BSY bit after the PIO setup
FIS. The dma state machine enters CMFatalErrorUpdate state and locks
up. This patch also removes the dma restart workaround from the read_id
function as the read_id function is only called by libata layer for
ATA_INTERNAL commands. But for some cases eg: PORT MULTIPLIER
and udev, the framework will enumerate using SCSI commands and it will
not call read_id function.
Signed-off-by: Loc Ho <lho@apm.com>
Signed-off-by: Suman Tripathi <stripathi@apm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
The subsequent patch will make use of them.
Signed-off-by: Loc Ho <lho@apm.com>
Signed-off-by: Suman Tripathi <stripathi@apm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
All LE controllers always implicitly stop advertising when establishing
connections. Therefore, be sure to clear the flag in the event handler
for new LE connections.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
If the connectable state change doesn't require any special HCI commands
the set_connectable_update_settings() function is used instead of the
set_connectable_complete() function. We must therefore make sure to call
hci_update_background_scan() there as well. This code path is used also
when we're powered off, but that's fine since hci_update_background_scan()
has the necessary checks for it.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
The connectable and discoverable mgmt settings are supported both for LE
and BR/EDR controllers so they do not belong behind a lmp_bredr_capable()
condition. This patch fixes the issue in get_supported_settings().
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
If any of the HCI commands from the hci_stop_discovery function were
successfully sent we need to set the discovery state to STOPPING. The
Stop Discovery code was already handling this, but the code in
clean_up_hci_state was not. This patch updates the hci_stop_discovery to
return a bool to indicate whether it queued any commands and the
clean_up_hci_state() function respectively to look at the return value
and call hci_discovery_set_state() if necessary.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
There are many different places that can disable LE scanning but we only
want to re-enable advertising in hci_cc_le_set_scan_enable() for a very
specific use case, which is when the active scanning part of Start
Discovery is complete. Because of this, fix the discovery state check to
test for the exact state.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Many controllers allow simultaneous active scanning and advertising
(e.g. Intel and Broadcom) but some do not (e.g. CSR). It's therefore
safest to implement mutual exclusion of these states in the kernel.
This patch ensures that the two states are never entered simultaneously.
Extra precaution needs to be taken for outgoing connection attempts in
slave role (i.e. through directed advertising) in which case the
operation that came first has precedence and the one that comes after
gets a rejection.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Most controllers do not support advertising while initiating an LE
connection. We also have to first disable current advertising if the
initiation is going to happen through direct advertising. Therefore,
simply stop advertising as the first thing when starting to issue
commands to establish an LE connection.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
When deciding to call disable_advertising() we're interested in the real
state instead of the mgmt setting. Use therefore HCI_LE_ADV instead of
the HCI_ADVERTISING flag.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
By adding support for disabling advertising when necessary and doing the
checks for existing LE connections inside the enable_advertising
function we can simplify the calling code quite a lot.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Now that we have a flag for tracking the real advertising state we
should use that to determine whether it's safe to update the random
address or not. The couple of places that were clearing the flag due to
a pending request need to be updated too.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Since the real advertising state is now tracked with its own flag we can
simply set/unset the HCI_ADVERTISING flag in the
set_advertising_complete function.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Having a single HCI_ADVERTISING flag is problematic since it tries to
track both the real advertising state and the corresponding mgmt
setting. To make the logic simpler and more reliable add a new flag that
only tracks the actual advertising state that has been written to the
controller.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Vendor ID 0x10de0070 is used by a yet-to-be-named GPU chip.
Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This code is not working currently and it can be removed. There is a
conflict in sharing resources with the actual HDMI driver and with
the ASoC HDMI audio DAI driver.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
PRCM code (when DSPBridge is used) for v3.16-rc.
Basic build, boot, and PM test logs are available here:
http://www.pwsan.com/omap/testlogs/prcm-a-v3.16-rc/20140706174258/
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Merge tag 'for-v3.16-rc/omap-fixes-b' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into omap-for-v3.16/fixes
Some miscellaneous fixes for OMAP clock code, DRA7xx device data, and
PRCM code (when DSPBridge is used) for v3.16-rc.
Basic build, boot, and PM test logs are available here:
http://www.pwsan.com/omap/testlogs/prcm-a-v3.16-rc/20140706174258/
The undo code assumes that, upon entering loss recovery, TCP
1) always retransmit something
2) the retransmission never fails locally (e.g., qdisc drop)
so undo_marker is set in tcp_enter_recovery() and undo_retrans is
incremented only when tcp_retransmit_skb() is successful.
When the assumption is broken because TCP's cwnd is too small to
retransmit or the retransmit fails locally. The next (DUP)ACK
would incorrectly revert the cwnd and the congestion state in
tcp_try_undo_dsack() or tcp_may_undo(). Subsequent (DUP)ACKs
may enter the recovery state. The sender repeatedly enter and
(incorrectly) exit recovery states if the retransmits continue to
fail locally while receiving (DUP)ACKs.
The fix is to initialize undo_retrans to -1 and start counting on
the first retransmission. Always increment undo_retrans even if the
retransmissions fail locally because they couldn't cause DSACKs to
undo the cwnd reduction.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The add_vxlan_port ndo driver code was wrongly testing whether HW vxlan offloads
are supported by the device instead of checking if they are currently enabled.
This causes the driver to configure the HW parser to conduct matching for vxlan
packets but since no steering rules were set, vxlan packets are dropped on RX.
Fix that by doing the right test, as done in the del_vxlan_port ndo handler.
Fixes: 1b136de ('net/mlx4: Implement vxlan ndo calls')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Tom Lendacky says:
====================
amd-xgbe: AMD 10Gb Ethernet driver updates
The following series fixes some bugs and provides new/changed support
in the driver.
- Fix a debugfs backward compatibility issue introduced by a previous patch
- Write to the interrupt enablement register, not the status register when
setting MTL interrupts
- Call netif_napi_del whenever the ndo_stop operation is called (to match
the call to netif_napi_add on ndo_open)
- Peformance enhancements:
- Adjusted default coalescing settings
- AXI DMA changes (burst length size and cache settings)
- ioread/iowrite reduction during interrupt
- Napi poll updates
- AXI DMA settings based on device tree property to account for a change in
the ARM64 default cache operations assignment
This patch series is based on net-next.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
