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vNIC is a PCIe-side abstraction NFP firmwares supported by this
driver use. It was initially meant to represent a device port
and therefore a netdev but today should be thought of as a way
of grouping descriptor rings and associated state. Advanced apps
will have vNICs without netdevs and ports without a vNIC (using
representors instead).
Make sure code refers to vNICs as vNICs and not ports or netdevs.
No functional changes.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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struct nfp_net represents a vNIC, we will be moving away from the
requirement for every vNIC to have a netdev associated with it.
Remove "netdev" from some function names and prefer passing
struct nfp_net pointer as argument instead of struct net_device *.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add nfp_cppcore_pcie_unit() helper to retrieve the PCIE unit of a CPP
handle and use the new helper as appropriate.
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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sizeof(priv->ucc_pram) is 4 as it is the size of a pointer, but we want
to reserve space for the struct ucc_hdlc_param.
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Cc: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The macsec implementation shouldn't account for rx/tx packets that are
dropped in the netdev framework. The netdev framework itself accounts
for such packets by atomically updating struct net_device`rx_dropped and
struct net_device`tx_dropped fields. Later on when the stats for macsec
link is retrieved, the packets dropped in netdev framework will be
included in dev_get_stats() after calling macsec.c`macsec_get_stats64()
Signed-off-by: Girish Moodalbail <girish.moodalbail@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Some drivers were calling the skb_tx_timestamp() function only when
a hardware timestamp was not requested. Now that applications can use
the SOF_TIMESTAMPING_OPT_TX_SWHW option to request both software and
hardware timestamps, the drivers need to be modified to unconditionally
call skb_tx_timestamp().
CC: Richard Cochran <richardcochran@gmail.com>
CC: Willem de Bruijn <willemb@google.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Include HWTSTAMP_FILTER_NTP_ALL in net_hwtstamp_validate() as a valid
filter and update drivers which can timestamp all packets, or which
explicitly list unsupported filters instead of using a default case, to
handle the filter.
CC: Richard Cochran <richardcochran@gmail.com>
CC: Willem de Bruijn <willemb@google.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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issue get port information command to firmware to retrieve port
information and update if it is different from what was last
recorded and also add indication for supported link modes for
firmware port types FW_PORT_TYPE_SFP28, FW_PORT_TYPE_KR_SFP28,
FW_PORT_TYPE_CR4_QSFP.
Based on the original work by Casey Leedom <leedom@chelsio.com>
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Current largesend and checksum offload feature in ibmveth driver,
- Source VM sends the TCP packets with ip_summed field set as
CHECKSUM_PARTIAL and TCP pseudo header checksum is placed in
checksum field
- CHECKSUM_PARTIAL flag in SKB will enable ibmveth driver to mark
"no checksum" and "checksum good" bits in transmit buffer descriptor
before the packet is delivered to pseries PowerVM Hypervisor
- If ibmveth has largesend capability enabled, transmit buffer descriptors
are market accordingly before packet is delivered to Hypervisor
(along with mss value for packets with length > MSS)
- Destination VM's ibmveth driver receives the packet with "checksum good"
bit set and so, SKB's ip_summed field is set with CHECKSUM_UNNECESSARY
- If "largesend" bit was on, mss value is copied from receive descriptor
into SKB's gso_size and other flags are appropriately set for
packets > MSS size
- The packet is now successfully delivered up the stack in destination VM
The offloads described above works fine for TCP communication among VMs in
the same pseries server ( VM A <=> PowerVM Hypervisor <=> VM B )
We are now enabling support for OVS in pseries PowerVM environment. One of
our requirements is to have ibmveth driver configured in "Trunk" mode, when
they are used with OVS. This is because, PowerVM Hypervisor will no more
bridge the packets between VMs, instead the packets are delivered to
IO Server which hosts OVS to bridge them between VMs or to external
networks (flow shown below),
VM A <=> PowerVM Hypervisor <=> IO Server(OVS) <=> PowerVM Hypervisor
<=> VM B
In "IO server" the packet is received by inbound Trunk ibmveth and then
delivered to OVS, which is then bridged to outbound Trunk ibmveth (shown
below),
Inbound Trunk ibmveth <=> OVS <=> Outbound Trunk ibmveth
In this model, we hit the following issues which impacted the VM
communication performance,
- Issue 1: ibmveth doesn't support largesend and checksum offload features
when configured as "Trunk". Driver has explicit checks to prevent
enabling these offloads.
- Issue 2: SYN packet drops seen at destination VM. When the packet
originates, it has CHECKSUM_PARTIAL flag set and as it gets delivered to
IO server's inbound Trunk ibmveth, on validating "checksum good" bits
in ibmveth receive routine, SKB's ip_summed field is set with
CHECKSUM_UNNECESSARY flag. This packet is then bridged by OVS (or Linux
Bridge) and delivered to outbound Trunk ibmveth. At this point the
outbound ibmveth transmit routine will not set "no checksum" and
"checksum good" bits in transmit buffer descriptor, as it does so only
when the ip_summed field is CHECKSUM_PARTIAL. When this packet gets
delivered to destination VM, TCP layer receives the packet with checksum
value of 0 and with no checksum related flags in ip_summed field. This
leads to packet drops. So, TCP connections never goes through fine.
- Issue 3: First packet of a TCP connection will be dropped, if there is
no OVS flow cached in datapath. OVS while trying to identify the flow,
computes the checksum. The computed checksum will be invalid at the
receiving end, as ibmveth transmit routine zeroes out the pseudo
checksum value in the packet. This leads to packet drop.
- Issue 4: ibmveth driver doesn't have support for SKB's with frag_list.
When Physical NIC has GRO enabled and when OVS bridges these packets,
OVS vport send code will end up calling dev_queue_xmit, which in turn
calls validate_xmit_skb.
In validate_xmit_skb routine, the larger packets will get segmented into
MSS sized segments, if SKB has a frag_list and if the driver to which
they are delivered to doesn't support NETIF_F_FRAGLIST feature.
This patch addresses the above four issues, thereby enabling end to end
largesend and checksum offload support for better performance.
- Fix for Issue 1 : Remove checks which prevent enabling TCP largesend and
checksum offloads.
- Fix for Issue 2 : When ibmveth receives a packet with "checksum good"
bit set and if its configured in Trunk mode, set appropriate SKB fields
using skb_partial_csum_set (ip_summed field is set with
CHECKSUM_PARTIAL)
- Fix for Issue 3: Recompute the pseudo header checksum before sending the
SKB up the stack.
- Fix for Issue 4: Linearize the SKBs with frag_list. Though we end up
allocating buffers and copying data, this fix gives
upto 4X throughput increase.
Note: All these fixes need to be dropped together as fixing just one of
them will lead to other issues immediately (especially for Issues 1,2 & 3).
Signed-off-by: Sivakumar Krishnasamy <ksiva@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Some variants of adapters support the 1G speed capability. Need to
allow the configuration of 1G speed if adapter supports it.
Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The management firmware HSI contains masks which are already
shifted to their right place, so QED_MFW_SET_FIELD() is clearing
incorrect fields by shifting the mask by the offset.
Luckily, today we set the fields in an incrementing order [so we're
not erasing any previously set fields], but this still needs fixing.
Signed-off-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is benign, but it makes more sense to start the close sequence
only after changing the internal state [in case it would once care].
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If too many CQs are requested, qed would print the available
number as if it's a resource and not a feature leading to the
wrong print.
Fixes: 08737a3fa30a ("qed: Inform qedi the number of possible CQs")
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Re-organize the logic that allocates and frees memory of various
sub-components of the hw-function -
a. No need to pass pointers to said structure as parameters;
The internal logic knows exactly where to find/set the data.
b. Nullify pointers after cleanup to prevent possible errors to
re-entrant code.
Signed-off-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Driver maintains its primary MAC in a private field which
gets updated when ndo_dev_set_mac() gets called.
However, there are flows where the primary MAC of the device can change
without said NDO being called [bond device in TLB mode configuring
slaves' addresses], resulting in a configuration where there's a mismatch
between what's apparent to user [the netdevice's value] and what's
configured in the HW [the private value].
As we don't have any real motivation of maintaining this
private field, simply remove it and start using the netdevice's
field instead.
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When destroying the datapath channels, qede doesn't notify qed of the
released status blocks which were acquired during the initialization.
Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Driver always allocates the maximal number of tx-buffers irrespective of
actual Tx ring config.
Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When management firmware declares that the device is WoL-capable,
the default driver behavior would be to allow the management firmware
to take the decision of whether it's actually needed or not.
Problem is ethtool interface doesn't have a 'default' kind
of option, and user would see the interface WoL as disabled,
which doesn't accurately reflect the actual configuration.
More-so, if the user actually wants to explicitly disable WoL he'd have
to first enable it [otherwise ethtool would block the command].
Instead of allowing management to make the decision, enable WoL by
default on all devices capable of it.
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch addresses the review comment from the previous patch set,
by using phy_interface_mode_is_rgmii() helper function to address
all RGMII phy mode variants.
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This bit was introduced with commit 5a21232983aa ("net: Support for
csum_bad in skbuff") to reduce the stack workload when processing RX
packets carrying a wrong Internet Checksum. Up to now, only one driver and
GRO core are setting it.
Suggested-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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'encap_header' is malloced and should be freed before leaving from
the error handling cases, otherwise it will cause memory leak.
Fixes: 232c001398ae ("net/mlx5e: Add support to neighbour update flow")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Remove including <linux/version.h> that is not needed.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add the missing unlock before return from function __ibmvnic_reset()
in the error handling case.
Fixes: ed651a10875f ("ibmvnic: Updated reset handling")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The function is not used, removing it fixes the following warning when
building with clang:
drivers/net/usb/net1080.c:271:20: error: unused function
'nc_dump_ttl' [-Werror,-Wunused-function]
Also remove the definition of TTL_THIS, which is only used in
nc_dump_ttl()
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The function is not used, removing it fixes the following warning when
building with clang:
drivers/net/usb/r8152.c:825:5: error: unused function 'usb_ocp_read'
[-Werror,-Wunused-function]
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This pushes qed [and as result, all qed* drivers] into using 8.20.0.0
firmware. The changes are mostly contained in qed with minor changes
to qedi due to some HSI changes.
Content-wise, the firmware contains fixes to various issues exposed
since the release of the previous firmware, including:
- Corrects iSCSI fast retransmit when data digest is enabled.
- Stop draining packets when receiving several consecutive PFCs.
- Prevent possible assertion when consecutively opening/closing
many connections.
- Prevent possible assertion due to too long BDQ fetch time.
In addition, the new firmware would allow us to later add iWARP support
in qed and qedr.
Changes from previous version
-----------------------------
- V2: Fix warning in qed_debug.c
Signed-off-by: Chad Dupuis <Chad.Dupuis@cavium.com>
Signed-off-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: Manish Rangankar <Manish.Rangankar@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In case we got an FDB notification for a port that doesn't exist we
execute an FDB entry delete to prevent it from re-appearing the next
time we poll for notifications.
If the operation failed we would trigger a NULL pointer dereference as
'mlxsw_sp_port' is NULL.
Fix it by reporting the error using the underlying bus device instead.
Fixes: 12f1501e7511 ("mlxsw: spectrum: remove FDB entry in case we get unknown object notification")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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octeon_devices_lock can be made static as it does not need to be
in global scope.
Cleans up sparse warning: "warning: symbol 'octeon_devices_lock'
was not declared. Should it be static?"
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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EPROBE_DEFER is not an error, hence printing an error message like
sh-eth ee700000.ethernet: failed to initialise MDIO
may confuse the user.
To fix this, suppress the error message in case of probe deferral.
While at it, shorten the message, and add the actual error code.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The MDIO initialization failure message is printed using the network
device, before it has been registered, leading to:
(null): failed to initialise MDIO
Use the platform device instead to fix this:
sh-eth ee700000.ethernet: failed to initialise MDIO
Fixes: daacf03f0bbfefee ("sh_eth: Register MDIO bus before registering the network device")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next
Marc Kleine-Budde says:
====================
pull-request: can-next 2017-05-18
this is a pull request of 4 patches for net-next/master.
All 4 patches are by Quentin Schulz, they add deep deep Suspend/Resume
support to the m_can driver.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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drivers/net/ethernet/mellanox/mlxsw//spectrum_dpipe.c:221:52: warning:
Using plain integer as NULL pointer
drivers/net/ethernet/mellanox/mlxsw//spectrum_dpipe.c:221:74: warning:
Using plain integer as NULL pointer
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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During rif counter freeing the counter index can be invalid. Add check
of validity before freeing the counter.
Fixes: e0c0afd8aa4e ("mlxsw: spectrum: Support for counters on router interfaces")
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In case of disabled counters the entry index will be incorrect. Fix this
by moving the entry index set before the counter status check.
Fixes: 2ba5999f009d ("mlxsw: spectrum: Add Support for erif table entries access")
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Cygnus is a small family of SoCs, of which we currently have
devicetree for BCM11360 and BCM58300. The 11360's B53 is mostly the
same as 58xx, just requiring a tiny bit of setup that was previously
missing.
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Now that the DSA public header includes switchdev.h, use the provided
switchdev_obj_dump_cb_t typedef for the object dump callback.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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DSA drivers and core use switchdev. Include switchdev.h only once, in
the dsa.h public header, so that inclusion in DSA drivers or forward
declarations of switchdev structures in not necessary anymore.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Change t4fw_version.h to update latest firmware version
number to 1.16.43.0.
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This adds support for hdlc-bus mode to the fsl_ucc_hdlc driver. This can
be enabled with the "fsl,hdlc-bus" property in the DTS node of the
corresponding ucc.
This aligns the configuration of the UPSMR and GUMR registers to what is
done in our ucc_hdlc driver (that only support hdlc-bus mode) and with
the QuickEngine's documentation for hdlc-bus mode.
GUMR/SYNL is set to AUTO for the busmode as in this case the CD signal
is ignored. The brkpt_support is enabled to set the HBM1 bit in the
CMXUCR register to configure an open-drain connected HDLC bus.
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Cc: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We can't assume that we are always in loopback mode if rx and tx clock
have the same clock source. If we want to use HDLC busmode we also have
the same clock source but we are not in loopback mode. So move the
setting of the baudrate generator after the check for property for the
loopback mode.
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Cc: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We need space for the struct qe_bd and not for a pointer to this struct.
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Cc: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Cc: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This fixes the following compiler warnings:
drivers/net/wan/fsl_ucc_hdlc.c: In function 'ucc_hdlc_poll':
warning: 'skb' may be used uninitialized in this function
[-Wmaybe-uninitialized]
skb->mac_header = skb->data - skb->head;
and
drivers/net/wan/fsl_ucc_hdlc.c: In function 'ucc_hdlc_probe':
drivers/net/wan/fsl_ucc_hdlc.c:1127:3: warning: 'utdm' may be used
uninitialized in this function [-Wmaybe-uninitialized]
kfree(utdm);
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Cc: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Some of the tracing seems to be remaining traces for basic driver
development. They can be removed now, as they cause noisy printouts.
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Cc: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In their infinite wisdom, and never ending quest for end user frustration,
Lenovo has decided to use a new USB device ID for the wwan modules in
their 2017 laptops. The actual hardware is still the Sierra Wireless
EM7455 or EM7430, depending on region.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
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4 billion packet queue is something unthinkable so use 32-bit value
for now.
Space savings on x86_64:
add/remove: 0/0 grow/shrink: 3/70 up/down: 16/-131 (-115)
function old new delta
change_tx_queue_len 94 108 +14
qdisc_create 1176 1177 +1
alloc_netdev_mqs 1124 1125 +1
xenvif_alloc 533 532 -1
x25_asy_setup 167 166 -1
...
tun_queue_resize 945 940 -5
pfifo_fast_enqueue 167 162 -5
qfq_init_qdisc 168 158 -10
tap_queue_resize 810 799 -11
transmit 719 698 -21
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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To support device tree usage for ftmac100.
Signed-off-by: Greentime Hu <green.hu@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch makes tap_recvmsg() can receive from skb from its caller
through msg_control. Vhost_net will be the first user.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch makes tun_recvmsg() can receive from skb from its caller
through msg_control. Vhost_net will be the first user.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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