| Age | Commit message (Collapse) | Author | Files | Lines |
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Keep that call timeouts as ktimes rather than jiffies so that they can be
expressed as functions of RTT.
Signed-off-by: David Howells <dhowells@redhat.com>
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Remove error from struct rxrpc_skb_priv as it is no longer used.
Signed-off-by: David Howells <dhowells@redhat.com>
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The offset field in struct rxrpc_skb_priv is unnecessary as the value can
always be calculated.
Signed-off-by: David Howells <dhowells@redhat.com>
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When we receive an ACK from the peer that tells us what the peer's receive
window (rwind) is, we should reduce ssthresh to rwind if rwind is smaller
than ssthresh.
Signed-off-by: David Howells <dhowells@redhat.com>
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Switch to Congestion Avoidance mode at cwnd == ssthresh rather than relying
on cwnd getting incremented beyond ssthresh and the window size, the mode
being shifted and then cwnd being corrected.
We need to make sure we switch into CA mode so that we stop marking every
packet for ACK.
Signed-off-by: David Howells <dhowells@redhat.com>
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Actually display in the tx_data trace the retransmission note added in a
previous patch.
Signed-off-by: David Howells <dhowells@redhat.com>
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This implements ndo_poll_controller in net_device_ops callbacks for mlx5,
which is necessary to use netconsole with this driver.
Acked-By: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Calvin Owens <calvinowens@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Set upper 32 bits of destination register to zeros after
load from the context structure.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This also can address following UBSAN warnings:
[ 36.640343] ================================================================================
[ 36.648772] UBSAN: Undefined behaviour in drivers/net/ethernet/mellanox/mlx4/fw.c:857:26
[ 36.656853] shift exponent 64 is too large for 32-bit type 'int'
[ 36.663348] ================================================================================
[ 36.671783] ================================================================================
[ 36.680213] UBSAN: Undefined behaviour in drivers/net/ethernet/mellanox/mlx4/fw.c:861:27
[ 36.688297] shift exponent 35 is too large for 32-bit type 'int'
[ 36.694702] ================================================================================
Tested:
reboot with UBSAN, no warning.
Signed-off-by: David Decotigny <decot@googlers.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This implements:
https://tools.ietf.org/html/rfc7559
Backoff is performed according to RFC3315 section 14:
https://tools.ietf.org/html/rfc3315#section-14
We allow setting /proc/sys/net/ipv6/conf/*/router_solicitations
to a negative value meaning an unlimited number of retransmits,
and we make this the new default (inline with the RFC).
We also add a new setting:
/proc/sys/net/ipv6/conf/*/router_solicitation_max_interval
defaulting to 1 hour (per RFC recommendation).
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Acked-by: Erik Kline <ek@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Jia He says:
====================
Reduce cache miss for snmp_fold_field
In a PowerPc server with large cpu number(160), besides commit
a3a773726c9f ("net: Optimize snmp stat aggregation by walking all
the percpu data at once"), I watched several other snmp_fold_field
callsites which would cause high cache miss rate.
test source code:
================
My simple test case, which read from the procfs items endlessly:
/***********************************************************/
int main(int argc, char **argv)
{
int i;
int fd = -1 ;
int rdsize = 0;
char buf[LINELEN+1];
buf[LINELEN] = 0;
memset(buf,0,LINELEN);
if(1 >= argc) {
printf("file name empty\n");
return -1;
}
fd = open(argv[1], O_RDWR, 0644);
if(0 > fd){
printf("open error\n");
return -2;
}
for(i=0;i<0xffffffff;i++) {
while(0 < (rdsize = read(fd,buf,LINELEN))){
//nothing here
}
lseek(fd, 0, SEEK_SET);
}
close(fd);
return 0;
}
/**********************************************************/
compile and run:
================
gcc test.c -o test
perf stat -d -e cache-misses ./test /proc/net/snmp
perf stat -d -e cache-misses ./test /proc/net/snmp6
perf stat -d -e cache-misses ./test /proc/net/sctp/snmp
perf stat -d -e cache-misses ./test /proc/net/xfrm_stat
before the patch set:
====================
Performance counter stats for 'system wide':
355911097 cache-misses [40.08%]
2356829300 L1-dcache-loads [60.04%]
355642645 L1-dcache-load-misses # 15.09% of all L1-dcache hits [60.02%]
346544541 LLC-loads [59.97%]
389763 LLC-load-misses # 0.11% of all LL-cache hits [40.02%]
6.245162638 seconds time elapsed
After the patch set:
===================
Performance counter stats for 'system wide':
194992476 cache-misses [40.03%]
6718051877 L1-dcache-loads [60.07%]
194871921 L1-dcache-load-misses # 2.90% of all L1-dcache hits [60.11%]
187632232 LLC-loads [60.04%]
464466 LLC-load-misses # 0.25% of all LL-cache hits [39.89%]
6.868422769 seconds time elapsed
The cache-miss rate can be reduced from 15% to 2.9%
changelog
=========
v6:
- correct v5
v5:
- order local variables from longest to shortest line
v4:
- move memset into one block of if statement in snmp6_seq_show_item
- remove the changes in netstat_seq_show considerred the stack usage is too large
v3:
- introduce generic interface (suggested by Marcelo Ricardo Leitner)
- use max_t instead of self defined macro (suggested by David Miller)
v2:
- fix bug in udplite statistics.
- snmp_seq_show is split into 2 parts
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is to suppress the checkpatch.pl warning "Comparison to NULL
could be written". No functional changes here.
Signed-off-by: Jia He <hejianet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The parameter items(is always ICMP6_MIB_MAX) is useless for __snmp6_fill_statsdev
Signed-off-by: Jia He <hejianet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is to use the generic interfaces snmp_get_cpu_field{,64}_batch to
aggregate the data by going through all the items of each cpu sequentially.
Signed-off-by: Jia He <hejianet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is to use the generic interfaces snmp_get_cpu_field{,64}_batch to
aggregate the data by going through all the items of each cpu sequentially.
Signed-off-by: Jia He <hejianet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is to use the generic interfaces snmp_get_cpu_field{,64}_batch to
aggregate the data by going through all the items of each cpu sequentially.
Signed-off-by: Jia He <hejianet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is to use the generic interfaces snmp_get_cpu_field{,64}_batch to
aggregate the data by going through all the items of each cpu sequentially.
Then snmp_seq_show is split into 2 parts to avoid build warning "the frame
size" larger than 1024.
Signed-off-by: Jia He <hejianet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is to introduce the generic interfaces for snmp_get_cpu_field{,64}.
It exchanges the two for-loops for collecting the percpu statistics data.
This can aggregate the data by going through all the items of each cpu
sequentially.
Signed-off-by: Jia He <hejianet@gmail.com>
Suggested-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
David Howells says:
====================
rxrpc: Fixes and adjustments
This set of patches contains some fixes and adjustments:
(1) Connections for exclusive calls are being reused because the check to
work out whether to set RXRPC_CONN_DONT_REUSE is checking where the
parameters will be copied to (but haven't yet).
(2) Make Tx loss-injection go through the normal return, so the state gets
set correctly for what the code thinks it has done.
Note lost Tx packets in the tx_data trace rather than the skb
tracepoint.
(3) Activate channels according to the current state from within the
channel_lock to avoid someone changing it on us.
(4) Reduce the local endpoint's services list to a single pointer as we
don't allow service AF_RXRPC sockets to share UDP ports with other
AF_RXRPC sockets, so there can't be more than one element in the list.
(5) Request more ACKs in slow-start mode to help monitor the state driving
the window configuration.
(6) Display the serial number of the packet being ACK'd rather than the
ACK packet's own serial number in the congestion trace as this can be
related to other entries in the trace.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
Kalle Valo says:
wireless-drivers-next patches for 4.9
Major changes:
iwlwifi
* work for new hardware support continues
* dynamic queue allocation stabilization
* improvements in the MSIx code
* multiqueue support work continues
* new firmware version support (API 26)
* add 8275 series support
* add 9560 series support
* add support for MU-MIMO sniffer
* add support for RRM by scan
* add support for "reverse" rx packet injection faking hw descriptors
* migrate to devm memory allocation handling
* Remove support for older firmwares (API older than -17 and -22)
wl12xx
* support booting the same rootfs with both wl12xx and wl18xx
hostap
* mark the driver as obsolete
ath9k
* disable RNG by default
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Vivien Didelot says:
====================
net: dsa: mv88e6xxx: Global (1) cosmetics
The Global (1) internal SMI device of Marvell switches is a set of
registers providing support to different units for MAC addresses (ATU),
VLANs (VTU), PHY polling (PPU), etc.
Chips (like 88E6060) may use a different address for it, or have
subtleties in the units (e.g. different number of databases, changing
how registers must be accessed), making it hard to maintain properly.
This patchset is a first step to polish the Global (1) support, with no
functional changes though. Here's basically what it does:
- add helpers to access Global1 registers (same for Global2)
- remove a few family checks (VTU/STU FID registers)
- s/mv88e6xxx_vtu_stu_entry/mv88e6xxx_vtu_entry/
- add a per-chip mv88e6xxx_ops structure of function pointers:
struct mv88e6xxx_ops {
int (*get_eeprom)(struct mv88e6xxx_chip *chip,
struct ethtool_eeprom *eeprom, u8 *data);
int (*set_eeprom)(struct mv88e6xxx_chip *chip,
struct ethtool_eeprom *eeprom, u8 *data);
int (*set_switch_mac)(struct mv88e6xxx_chip *chip, u8 *addr);
int (*phy_read)(struct mv88e6xxx_chip *chip, int addr, int reg,
u16 *val);
int (*phy_write)(struct mv88e6xxx_chip *chip, int addr, int reg,
u16 val);
};
Future patchsets will add ATU/VTU ops, software reset, etc.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Remove EEPROM flags in favor of new {get,set}_eeprom chip-wide
functions in the mv88e6xxx_ops structure.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add a set_switch_mac chip-wide function to mv88e6xxx_ops and remove
MV88E6XXX_FLAG_G2_SWITCH_MAC flags.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Introduce a mv88e6xxx_ops structure to describe supported chip-wide
functions and assign the correct variant to the chip models.
For the moment, add only PHY access routines. This allows to get rid of
the PHY ops structures and the usage of PHY flags.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The mv88e6xxx_ops is used to describe how to access the chip registers.
It can be through SMI (via an MDIO bus), or via another interface such
as crafted remote management frames.
The correct BUS operations structure is chosen at runtime, depending on
the chip address and connectivity.
We will need the mv88e6xxx_ops name for future chip-wide operation
structure, thus rename mv88e6xxx_ops to more explicit mv88e6xxx_bus_ops.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The STU (if the switch has one) is abstracted and accessed through the
VTU operations and data registers.
Thus rename the mv88e6xxx_vtu_stu_entry struct to mv88e6xxx_vtu_entry.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add an mv88e6xxx_num_ports helper instead of digging in the chip info
structure.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The mv88e6xxx_num_databases will be used by shared code, so move it
inline to the header file.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add flags to describe the presence of Global 1 ATU FID register (0x01)
and VTU FID register (0x02), instead of checking families.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Similarly to the ports, phys, and Global SMI devices, abstract the SMI
device address of the Global 2 registers in a few g2 static helpers.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The Global (1) internal SMI device is an extended set of registers
containing ATU, PPU, VTU, STU, etc.
It is present on every switches, usually at SMI address 0x1B. But old
models such as 88E6060 access it at address 0xF, thus using REG_GLOBAL
is erroneous.
Add a global1_addr info member used by mv88e6xxx_g1_{read,write} and
mv88e6xxx_g1_wait helpers in a new global1.c file.
This patch finally removes _mv88e6xxx_reg_{read,write}, in favor on the
appropriate helpers. No functional changes here.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Note the serial number of the packet being ACK'd in the congestion
management trace rather than the serial number of the ACK packet. Whilst
the serial number of the ACK packet is useful for matching ACK packet in
the output of wireshark, the serial number that the ACK is in response to
is of more use in working out how different trace lines relate.
Signed-off-by: David Howells <dhowells@redhat.com>
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Set the request-ACK on more DATA packets whilst we're in slow start mode so
that we get sufficient ACKs back to supply information to configure the
window.
Signed-off-by: David Howells <dhowells@redhat.com>
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Reduce the rxrpc_local::services list to just a pointer as we don't permit
multiple service endpoints to bind to a single transport endpoints (this is
excluded by rxrpc_lookup_local()).
The reason we don't allow this is that if you send a request to an AFS
filesystem service, it will try to talk back to your cache manager on the
port you sent from (this is how file change notifications are handled). To
prevent someone from stealing your CM callbacks, we don't let AF_RXRPC
sockets share a UDP socket if at least one of them has a service bound.
Signed-off-by: David Howells <dhowells@redhat.com>
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In rxrpc_activate_channels(), the connection cache state is checked outside
of the lock, which means it can change whilst we're waking calls up,
thereby changing whether or not we're allowed to wake calls up.
Fix this by moving the check inside the locked region. The check to see if
all the channels are currently busy can stay outside of the locked region.
Whilst we're at it:
(1) Split the locked section out into its own function so that we can call
it from other places in a later patch.
(2) Determine the mask of channels dependent on the state as we're going
to add another state in a later patch that will restrict the number of
simultaneous calls to 1 on a connection.
Signed-off-by: David Howells <dhowells@redhat.com>
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In rxrpc_send_data_packet() make the loss-injection path return through the
same code as the transmission path so that the RTT determination is
initiated and any future timer shuffling will be done, despite the packet
having been binned.
Whilst we're at it:
(1) Add to the tx_data tracepoint an indication of whether or not we're
retransmitting a data packet.
(2) When we're deciding whether or not to request an ACK, rather than
checking if we're in fast-retransmit mode check instead if we're
retransmitting.
(3) Don't invoke the lose_skb tracepoint when losing a Tx packet as we're
not altering the sk_buff refcount nor are we just seeing it after
getting it off the Tx list.
(4) The rxrpc_skb_tx_lost note is then no longer used so remove it.
(5) rxrpc_lose_skb() no longer needs to deal with rxrpc_skb_tx_lost.
Signed-off-by: David Howells <dhowells@redhat.com>
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Exclusive connections are currently reusable (which they shouldn't be)
because rxrpc_alloc_client_connection() checks the exclusive flag in the
rxrpc_connection struct before it's initialised from the function
parameters. This means that the DONT_REUSE flag doesn't get set.
Fix this by checking the function parameters for the exclusive flag.
Signed-off-by: David Howells <dhowells@redhat.com>
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Timur Tabi says:
====================
Add basic ACPI support to the Qualcomm Technologies EMAC driver
This patch series adds support to the EMAC driver for extracting addresses,
interrupts, and some _DSDs (properties) from ACPI. The first two patches
clean up the code, and the third patch adds ACPI-specific functionality.
The first patch fixes a bug with handling the platform_device for the
internal PHY. This phy is treated as a separate device in both DT and
ACPI, but since the platform is not released automatically when the
driver unloads, managed functions like devm_ioremap_resource cannot be
used.
The second patch replaces of_get_mac_address with its platform-independent
equivalent device_get_mac_address.
The third patch parses the ACPI tables to obtain the platform_device for
the primary EMAC node ("QCOM8070") and the internal phy node ("QCOM8071").
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add support for reading addresses, interrupts, and _DSD properties
from ACPI tables, just like with device tree. The HID for the
EMAC device itself is QCOM8070. The internal PHY is represented
by a child node with a HID of QCOM8071.
The EMAC also has some complex clock initialization requirements
that are not represented by this patch. This will be addressed
in a future patch.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Replace the DT-specific of_get_mac_address() function with
device_get_mac_address, which works on both DT and ACPI platforms. This
change makes it easier to add ACPI support.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The platform_device returned by of_find_device_by_node() is not
automatically released when the driver unprobes. Therefore,
managed calls like devm_ioremap_resource() should not be used.
Instead, we manually allocate the resources and then free them
on driver release.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Suppose you have a map array value that is something like this
struct foo {
unsigned iter;
int array[SOME_CONSTANT];
};
You can easily insert this into an array, but you cannot modify the contents of
foo->array[] after the fact. This is because we have no way to verify we won't
go off the end of the array at verification time. This patch provides a start
for this work. We accomplish this by keeping track of a minimum and maximum
value a register could be while we're checking the code. Then at the time we
try to do an access into a MAP_VALUE we verify that the maximum offset into that
region is a valid access into that memory region. So in practice, code such as
this
unsigned index = 0;
if (foo->iter >= SOME_CONSTANT)
foo->iter = index;
else
index = foo->iter++;
foo->array[index] = bar;
would be allowed, as we can verify that index will always be between 0 and
SOME_CONSTANT-1. If you wish to use signed values you'll have to have an extra
check to make sure the index isn't less than 0, or do something like index %=
SOME_CONSTANT.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since commit 900f65d361d3 ("tcp: move duplicate code from
tcp_v4_init_sock()/tcp_v6_init_sock()") we no longer need
to export sk_stream_write_space()
From: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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ath.git patches for 4.9. Major changes:
ath9k
* disable RNG by default
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The current code changes txhash (flowlables) on every retransmitted
SYN/ACK, but only after the 2nd retransmitted SYN and only after
tcp_retries1 RTO retransmits.
With this patch:
1) txhash is changed with every SYN retransmits
2) txhash is changed with every RTO.
The result is that we can start re-routing around failed (or very
congested paths) as soon as possible. Otherwise application health
checks may fail and the connection may be terminated before we start
to change txhash.
v4: Removed sysctl, txhash is changed for all RTOs
v3: Removed text saying default value of sysctl is 0 (it is 100)
v2: Added sysctl documentation and cleaned code
Tested with packetdrill tests
Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is old code for old hardware and it is not really accurate to claim
this to be maintained anymore. Change the status to "Obsolete" to make
it clearer that minor cleanup and other unnecessary changes from
automated tools is not necessarily beneficial and has larger risk of
breaking something without being quickly noticed due to lack of testing.
In addition, remove the old mailing list that does not work anymore and
point the web-page to a more accurate URL.
Signed-off-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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When building with W=1, we got one warning as belows:
drivers/net/wireless/ath/ath6kl/wmi.c:3509:6: warning: variable ‘ret’
set but not used [-Wunused-but-set-variable]
At the end of ath6kl_wmi_set_pvb_cmd, it is returned by 0 regardless of
return value of ath6kl_wmi_cmd_send.
This patch fixes return value from 0 to ret that has result of
ath6kl_wmi_cmd_send execution.
Signed-off-by: Chaehyun Lim <chaehyun.lim@gmail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
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ath9k RNG will dominates all the noise sources from the real HW
RNG, disable it by default. But we strongly recommand to enable
it if the system without HW RNG, especially on embedded systems.
Signed-off-by: Miaoqing Pan <miaoqing@codeaurora.org>
Acked-by: Stephan Mueller <smueller@chronox.de>
Acked-by: Stephan Mueller <smueller@chronox.de>
Reviewed-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
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Firmware is running watchdog timer for tracking copy engine ring index
and write index. Whenever both indices are stuck at same location for
given duration, watchdog will be trigger to assert target. While
updating copy engine destination ring write index, driver ensures that
write index will not be same as read index by finding delta between these
two indices (CE_RING_DELTA).
HTT target to host copy engine (CE5) is special case where ring buffers
will be reused and delta check is not applied while updating write index.
In rare scenario, whenever CE5 ring is full, both indices will be referring
same location and this is causing CE ring stuck issue as explained
above. This issue is originally reported on IPQ4019 during long hour stress
testing and during veriwave max clients testsuites. The same issue is
also observed in other chips as well. Fix this by ensuring that write
index is one less than read index which means that full ring is
available for receiving data.
Cc: stable@vger.kernel.org
Tested-by: Tamizh chelvam <c_traja@qti.qualcomm.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
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Ignore processing further in SWBA event scheduled for a vif, if mac80211
has marked the particular vif for stop beaconing and brought the vdev
down in 'ath10k_control_beaconing'. This should potentially avoid ath10k
warning/error messages while running continuous wifi down/up with max
number of vaps configured. Found this change during code walk through
and going through other beacon configuration related functions in ath10k
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
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