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Instead of hand crafted mlx5_qp_context and mlx5_qp_path use common
MLX5_SET() macros.
Link: https://lore.kernel.org/r/20200526115440.205922-7-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
As a preparation to removal hand crafted mlx5_qp_context, convert
query_qp_attr() to use proper MLX5_GET() macros.
Link: https://lore.kernel.org/r/20200526115440.205922-6-leon@kernel.org
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
As a preparation to removal hand crafted mlx5_qp_context, convert counter
code to use mlx5_cmd_exec_in() directly.
Link: https://lore.kernel.org/r/20200526115440.205922-5-leon@kernel.org
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Allow users to ask creation of QPs with specific ECE options. Such early
set even before RDMA-CM connection is established is useful if user knows
exactly which option he needs.
Link: https://lore.kernel.org/r/20200526115440.205922-4-leon@kernel.org
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Supported ECE options are returned from FW in the create_qp phase and zero
means that field is not valid. Such default value allows us to reuse
reserved field without worries about comp_mask.
Update create QP API to return ECE options.
Link: https://lore.kernel.org/r/20200526115440.205922-3-leon@kernel.org
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
From the mlx5-next branch at
git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux
Required for dependencies in following patches
* branch 'mellanox/mlx5-next':
net/mlx5: Add ability to read and write ECE options
net/mlx5: Add support for RDMA TX FT headers modifying
net/mlx5: Move iseg access helper routines close to mlx5_core driver
net/mlx5: Cleanup mlx5_ifc_fte_match_set_misc2_bits
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
The commit citied in the Fixes line wasn't complete and solved
only part of the problems. Update the mlx5_ib to properly support
MLX5_CMD_OP_INIT2INIT_QP command in the DEVX, that is required when
modify the QP tx_port_affinity.
Fixes: 819f7427bafd ("RDMA/mlx5: Add init2init as a modify command")
Link: https://lore.kernel.org/r/20200527135703.482501-1-leon@kernel.org
Signed-off-by: Mark Zhang <markz@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
While creating a uobject every create reaches a point where the uobject is
fully initialized. For ioctls that go on to copy_to_user this means they
need to open code the destruction of a fully created uobject - ie the
RDMA_REMOVE_DESTROY sort of flow.
Open coding this creates bugs, eg the CQ does not properly flush the
events list when it does its error unwind.
Provide a uverbs_finalize_uobj_create() function which indicates that the
uobject is fully initialized and that abort should call to destroy_hw to
destroy the uobj->object and related.
Methods can call this function if they go on to have error cases after
setting uobj->object. Once done those error cases can simply do return,
without an error unwind.
Link: https://lore.kernel.org/r/20200519072711.257271-2-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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Merge tag 'v5.7-rc6' into rdma.git for-next
Linux 5.7-rc6
Conflict in drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c
resolved by deleting dr_cq_event, matching how netdev resolved it.
Required for dependencies in the following patches.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Missing INIT2INIT entry in the list of modify commands caused DEVX
applications to be unable to modify_qp for this transition state. Add the
MLX5_CMD_OP_INIT2INIT_QP opcode to the list of allowed DEVX opcodes.
Fixes: e662e14d801b ("IB/mlx5: Add DEVX support for modify and query commands")
Link: https://lore.kernel.org/r/20200513095550.211345-1-leon@kernel.org
Signed-off-by: Aharon Landau <aharonl@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Support adding header modifying actions to the RDMA TX flow table.
Signed-off-by: Michael Guralnik <michaelgur@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Current description doesn't include new devices, change it by updating to
have more generic description and remove DRIVER_NAME and DRIVER_VERSION
defines.
Link: https://lore.kernel.org/r/20200513095304.210240-1-leon@kernel.org
Signed-off-by: Shay Drory <shayd@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
The output buffer used in mlx5_cmd_exec_inout() was wrongly changed from
pre-allocated srq_out pointer to an input "out" point. That leads to
unpredictable results in the get_srqc() call later.
Fixes: 31578defe4eb ("RDMA/mlx5: Update mlx5_ib to use new cmd interface")
Link: https://lore.kernel.org/r/20200513100809.246315-1-leon@kernel.org
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
When drop action is used the matching packet will stop processing in
steering and will be dropped. This functionality will allow users to drop
matching packets.
Link: https://lore.kernel.org/r/20200504054227.271486-1-leon@kernel.org
Signed-off-by: Daria Velikovsky <daria@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
User can configure default miss rule in order to skip matching in the user
domain and forward the packet to the kernel steering domain. When user
requests a default miss rule, we add steering rule to forward the traffic
to the next namespace.
Link: https://lore.kernel.org/r/20200504053012.270689-5-leon@kernel.org
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Move part of the code that get the destinations into function so the code
will be more readable. In addition change the variables definition to be
in reversed christmas tree.
Link: https://lore.kernel.org/r/20200504053012.270689-4-leon@kernel.org
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
From the mlx5-next branch at
git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux
Required for dependencies in following patches
* branch 'mellanox/mlx5-next':
net/mlx5: Add support in forward to namespace
{IB/net}/mlx5: Simplify don't trap code
net/mlx5: Replace zero-length array with flexible-array
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
The fs_core already supports creation of rules with multiple
actions/destinations. Refactor fs_core to handle the case
when don't trap rule is created with destination. Adapt the
calling code in the driver.
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Mark Zhang <markz@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
The variable rcqe_sz is being unnecessarily assigned twice, fix this by
removing one of the duplicates.
Fixes: 8bde2c509e40 ("RDMA/mlx5: Update all DRIVER QP places to use QP subtype")
Link: https://lore.kernel.org/r/20200507151610.52636-1-colin.king@canonical.com
Addresses-Coverity: ("Evaluation order violation")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
When operating in switchdev mode or using devlink to disable RoCE
only raw Ethernet QPs are allowed to be created.
When in switchdev mode this can lead to passing an invalid port number
as part of the modify qp firmware cmd and will lead to a syndrome
reported back to the user, such as:
* mlx5_cmd_check:803:(pid 50148): RST2INIT_QP(0x502) op_mod(0x0) failed,
status bad parameter(0x3), syndrome (0x177405).
Internal UD QP might be used to test for write combining support (even if
externally we report RoCE as disabled) check for that specific flag and
allow is specifically.
Fixes: b5ca15ad7e61 ("IB/mlx5: Add proper representors support")
Link: https://lore.kernel.org/r/20200506071602.7177-3-leon@kernel.org
Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Assign the profile to the IB device before executing stages. This will
allow to check which profile is being used from within a stage.
Link: https://lore.kernel.org/r/20200506071602.7177-2-leon@kernel.org
Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Add small helpers in order to avoid code duplication and improve code
readability. Decrease the amount of code in the gigantic post_send
function and divide it to readable methods that will help in code
maintenance in the future.
Link: https://lore.kernel.org/r/20200506065513.4668-3-leon@kernel.org
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reuse newly introduced mlx5_cmd_exec_in() and mlx5_cmd_exec_inout() to
reduce code duplication in mlx5_ib module.
Link: https://lore.kernel.org/r/20200506065513.4668-2-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Calculate UDP source port based on the grh.flow_label. If grh.flow_label
is not valid, we will use minimal supported UDP source port.
Link: https://lore.kernel.org/r/20200504051935.269708-6-leon@kernel.org
Signed-off-by: Mark Zhang <markz@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Calculate and set UDP source port based on the flow label. If flow label
is not defined in GRH then calculate it based on lqpn/rqpn.
Link: https://lore.kernel.org/r/20200504051935.269708-4-leon@kernel.org
Signed-off-by: Mark Zhang <markz@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
The patch sets the lag tx affinity of the data QPs and the GSI QPs
according to the LAG xmit slave.
For GSI QPs, in case the link layer is Ethenet (RoCE) we create two GSI
QPs, one for each physical port. When the driver selects the GSI QP, it
will consider the port affinity result. For connected QPs, the driver
sets the affinity of the xmit slave.
The above, ensures that RC QP and it's corresponding GSI QP will transmit
from the same physical port.
Link: https://lore.kernel.org/r/20200430192146.12863-17-maorg@mellanox.com
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Move affinity related code in modify qp to function. It's a preparation
for next patch the extend the affinity calculation to consider the xmit
slave.
Link: https://lore.kernel.org/r/20200430192146.12863-16-maorg@mellanox.com
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Following patch adds additional argument to the create AH function, so it
make sense to group ah_attr and flags arguments in struct.
Link: https://lore.kernel.org/r/20200430192146.12863-13-maorg@mellanox.com
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Acked-by: Devesh Sharma <devesh.sharma@broadcom.com>
Acked-by: Gal Pressman <galpress@amazon.com>
Acked-by: Weihang Li <liweihang@huawei.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
RAW packet QP and underlay QP must be created with either
RQ or SQ, check that.
Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters")
Link: https://lore.kernel.org/r/20200427154636.381474-37-leon@kernel.org
Signed-off-by: Aharon Landau <aharonl@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Finish separation to blocks of mlx5_ib_create_qp() functions,
so all internal create QP implementation are located in one place.
Link: https://lore.kernel.org/r/20200427154636.381474-36-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
After major refactoring in create QP flow, it is no needed to call
to destroy QP in XRC_TGT flow.
Link: https://lore.kernel.org/r/20200427154636.381474-35-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Update all the places in create QP flows to copy response
to the user in one place.
Link: https://lore.kernel.org/r/20200427154636.381474-34-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Place in one function all udata size checks. This will allow
us move ib_copy_to_udata() in general place and ensure that
it will be performed after call to the FW.
Link: https://lore.kernel.org/r/20200427154636.381474-33-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Move check that user didn't supplied RSS RAW QP unsupported
command flags to the function that checks all such flags.
Link: https://lore.kernel.org/r/20200427154636.381474-32-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
The amount of parameters passed in and out between internal mlx5
create QP functions is too large to easily follow the flow. Change
it by grouping all create QP parameter into one structure.
Link: https://lore.kernel.org/r/20200427154636.381474-31-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Delete both PD argument and checks if udata was provided, in favour
of unified destroy QP functions.
Link: https://lore.kernel.org/r/20200427154636.381474-30-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
The kernel and user create QP flows have very little common code,
separate them to simplify the future work of creating per-type
create_*_qp() functions.
Link: https://lore.kernel.org/r/20200427154636.381474-29-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
XRC_TGT QP doesn't fail into kernel or user flow separation. It is
initiated by the user, but is created through in-kernel verbs flow
and doesn't have PD and udata in similar way to kernel QPs.
So let's separate creation of that QP type from the common flow.
Link: https://lore.kernel.org/r/20200427154636.381474-28-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Remove duplication in parsing of DEVX UID.
Link: https://lore.kernel.org/r/20200427154636.381474-27-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
The inlen is set to be above zero in all flows before
and can't be negative at this stage.
Link: https://lore.kernel.org/r/20200427154636.381474-26-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Instead of keeping special field to separate kernel/user create/destroy
flows, rely on existence of udata pointer. All allocation flows are
using kzalloc() and leave uninitialized pointers as NULL which makes
MLX5_QP_EMPTY and MLX5_QP_KERNEL flows to be the same.
Link: https://lore.kernel.org/r/20200427154636.381474-25-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Combine copy_from_user() from create_user_qp() and general code.
Link: https://lore.kernel.org/r/20200427154636.381474-24-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Change the create QP flow to handle all copy_from_user() operations in
one place.
Link: https://lore.kernel.org/r/20200427154636.381474-23-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Perform check of attributes of RAW PACKET QP in separate function.
Link: https://lore.kernel.org/r/20200427154636.381474-22-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
QP type is stored in the IB/core QP struct, but it doesn't have all the
needed information, like internal QP type used in the driver itself.
Update mlx5_ib to have cached QP type which includes both IBTA and
Mellanox specific one.
Such change allows us to make even further cleanup of QP creation flow.
Link: https://lore.kernel.org/r/20200427154636.381474-21-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
There is no need to explicitly check unsupported QP types,
rely on "default" keyword in switch-case to catch them.
Link: https://lore.kernel.org/r/20200427154636.381474-20-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Leon Romanovsky says:
====================
This is first part of series which tries to return some sanity to
mlx5_ib_create_qp() function. Such refactoring is required to make
extension of that function with less worries of breaking driver.
Extra goal of such refactoring is to ensure that QP is allocated at the
beginning of function and released at the end. It will allow us to move QP
allocation to be under IB/core responsibility.
====================
Based on the mlx5-next branch at
git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux
Due to dependencies
* branch 'mlx5_ib_qp_refactor_1': (66 commits)
RDMA/mlx5: Process all vendor flags in one place
RDMA/mlx5: Return all configured create flags through query QP
RDMA/mlx5: Change scatter CQE flag to be set like other vendor flags
RDMA/mlx5: Use flags_en mechanism to mark QP created with WQE signature
RDMA/mlx5: Process create QP flags in one place
RDMA/mlx5: Delete create QP flags obfuscation
RDMA/mlx5: Initial separation of RAW_PACKET QP from common flow
RDMA/mlx5: Remove second copy from user for non RSS RAW QPs
RDMA/mlx5: Move DRIVER QP flags check into separate function
RDMA/mlx5: Update all DRIVER QP places to use QP subtype
RDMA/mlx5: Split scatter CQE configuration for DCT QP
RDMA/mlx5: Separate create QP flows to be based on type
RDMA/mlx5: Set QP subtype immediately when it is known
RDMA/mlx5: Avoid setting redundant NULL for XRC QPs
RDMA/mlx5: Prepare QP allocation for future removal
RDMA/mlx5: Perform check if QP creation flow is valid
RDMA/mlx5: Delete impossible GSI port check
RDMA/mlx5: Organize QP types checks in one place
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Check that vendor flags provided through ucmd are valid.
Link: https://lore.kernel.org/r/20200427154636.381474-19-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
The "flags" field in struct mlx5_ib_qp contains all UAPI flags
configured at the create QP stage. Return all the data as is
without masking.
Link: https://lore.kernel.org/r/20200427154636.381474-18-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
