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path: root/drivers/infiniband/hw/ocrdma (follow)
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2019-11-17IB/umem: remove the dmasync argument to ib_umem_getChristoph Hellwig1-1/+1
The argument is always ignored, so remove it. Link: https://lore.kernel.org/r/20191113073214.9514-3-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com> Acked-by: Michal Kalderon <michal.kalderon@marvell.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-11-14RDMA/ocrdma: Fix spelling mistake in variable nameColin Ian King2-3/+3
There is a spelling mistake in the variable nak_invalid_requst_errors, rename it to nak_invalid_request_errors. Link: https://lore.kernel.org/r/20191107224855.417647-1-colin.king@canonical.com Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-11-12RDMA: Change MAD processing function to remove extra casting and parameterLeon Romanovsky2-18/+10
All users of process_mad() converts input pointers from ib_mad_hdr to be ib_mad, update the function declaration to use ib_mad directly. Also remove not used input MAD size parameter. Link: https://lore.kernel.org/r/20191029062745.7932-17-leon@kernel.org Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Tested-By: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-11-06RDMA/ocrdma: Simplify process_mad functionLeon Romanovsky1-8/+4
Change the switch with one case into a simple if statement so the code is less confusing. Link: https://lore.kernel.org/r/20191029062745.7932-12-leon@kernel.org Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-11-06RDMA/mad: Do not check MAD sizes in roce and ib driversLeon Romanovsky1-4/+0
All callers for process_mad allocate MAD structures with proper sizes, there is no need to recheck it. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-11-06RDMA/ocrdma: Make ocrdma_pma_counters() return voidLeon Romanovsky3-9/+4
This function always returns 0, so just use void and remove the bogus checking at the only call site. Link: https://lore.kernel.org/r/20191029062745.7932-6-leon@kernel.org Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-11-06RDMA/mad: Allocate zeroed MAD bufferLeon Romanovsky1-1/+0
Ensure that MAD output buffer is zero-based allocated in all the callers of process_mad and remove the various memset()'s from the drivers. Link: https://lore.kernel.org/r/20191029062745.7932-3-leon@kernel.org Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-11-06RDMA/ocrdma: Remove unsupported modify_port callbackKamal Heib3-9/+0
There is no need to return always zero for function which is not supported. Fixes: fe2caefcdf58 ("RDMA/ocrdma: Add driver for Emulex OneConnect IBoE RDMA adapter") Link: https://lore.kernel.org/r/20191028155931.1114-4-kamalheib1@gmail.com Signed-off-by: Kamal Heib <kamalheib1@gmail.com> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-08-12RDMA: Introduce ib_port_phys_state enumKamal Heib1-2/+2
In order to improve readability, add ib_port_phys_state enum to replace the use of magic numbers. Signed-off-by: Kamal Heib <kamalheib1@gmail.com> Reviewed-by: Andrew Boyer <aboyer@tobark.org> Acked-by: Michal Kalderon <michal.kalderon@marvell.com> Acked-by: Bernard Metzler <bmt@zurich.ibm.com> Link: https://lore.kernel.org/r/20190807103138.17219-2-kamalheib1@gmail.com Signed-off-by: Doug Ledford <dledford@redhat.com>
2019-07-03IB: Remove unneeded memsetFuqian Huang1-3/+0
In commit af7ddd8a627c ("Merge tag 'dma-mapping-4.21' of git://git.infradead.org/users/hch/dma-mapping"), dma_alloc_coherent/dmam_alloc_coherent always zeroed the returned memory. So the memset after a coherent allocation function is not needed. Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-06-28Merge tag 'v5.2-rc6' into rdma.git for-nextJason Gunthorpe2-0/+2
For dependencies in next patches. Resolve conflicts: - Use uverbs_get_cleared_udata() with new cq allocation flow - Continue to delete nes despite SPDX conflict - Resolve list appends in mlx5_command_str() - Use u16 for vport_rule stuff - Resolve list appends in struct ib_client Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-06-20RDMA: Check umem pointer validity prior to releaseLeon Romanovsky1-2/+1
Update ib_umem_release() to behave similarly to kfree() and allow submitting NULL pointer as safe input to this function. Fixes: a52c8e2469c3 ("RDMA: Clean destroy CQ in drivers do not return errors") Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2019-06-11RDMA: Convert CQ allocations to be under core responsibilityLeon Romanovsky3-21/+14
Ensure that CQ is allocated and freed by IB/core and not by drivers. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Acked-by: Gal Pressman <galpress@amazon.com> Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Tested-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2019-06-11RDMA: Clean destroy CQ in drivers do not return errorsLeon Romanovsky4-11/+7
Like all other destroy commands, .destroy_cq() call is not supposed to fail. In all flows, the attempt to return earlier caused to memory leaks. This patch converts .destroy_cq() to do not return any errors. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Acked-by: Gal Pressman <galpress@amazon.com> Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
2019-06-10RDMA: Move owner into struct ib_device_opsJason Gunthorpe1-1/+1
This more closely follows how other subsytems work, with owner being a member of the structure containing the function pointers. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-06-10RDMA: Move uverbs_abi_ver into struct ib_device_opsJason Gunthorpe1-1/+1
No reason for every driver to emit code to set this, just make it part of the driver's existing static const ops structure. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-06-10RDMA: Move driver_id into struct ib_device_opsJason Gunthorpe1-1/+2
No reason for every driver to emit code to set this, just make it part of the driver's existing static const ops structure. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner2-0/+2
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-13RDMA: Directly cast the sockaddr union to sockaddrJason Gunthorpe2-6/+4
gcc 9 now does allocation size tracking and thinks that passing the member of a union and then accessing beyond that member's bounds is an overflow. Instead of using the union member, use the entire union with a cast to get to the sockaddr. gcc will now know that the memory extends the full size of the union. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-05-03RDMA: Introduce and use GID attr helper to read RoCE L2 fieldsParav Pandit2-7/+9
Instead of RoCE drivers figuring out vlan, smac fields while working on QP/AH, provide a helper routine to read the L2 fields such as vlan_id and source mac address. This moves logic from mlx5 driver to core for wider usage for RoCE ports. This is a preparation patch to allow detaching netdev in subsequent patch. Signed-off-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-04-12RDMA/ocrdma: Remove use of idr use pci bdf insteadDevesh Sharma1-11/+2
Removing the use of IDR variable just to name the function ids. Using the PCI_FUNC(pdev->devfn) instead to create the device name, associated resources and to print driver into at various places. Reported-by: Matthew Wilcox <willy@infradead.org> Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-04-09RDMA/drivers: Convert easy drivers to use ib_device_set_netdev()Jason Gunthorpe3-20/+7
Drivers that never change their ndev dynamically do not need to use the get_netdev callback. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Acked-by: Selvin Xavier <selvin.xavier@broadcom.com> Acked-by: Michal Kalderon <michal.kalderon@marvell.com> Acked-by: Adit Ranadive <aditr@vmware.com>
2019-04-08RDMA: Handle SRQ allocations by IB/coreLeon Romanovsky5-36/+29
Convert SRQ allocation from drivers to be in the IB/core Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-04-08RDMA: Handle AH allocations by IB/coreLeon Romanovsky5-23/+17
Simplify drivers by ensuring lifetime of ib_ah object. The changes in .create_ah() go hand in hand with relevant update in .destroy_ah(). We will use this opportunity and convert .destroy_ah() to don't fail, as it was suggested a long time ago, because there is nothing to do in case of failure during destroy. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-04-01IB: Pass only ib_udata in function prototypesShamir Rabinovitch2-22/+32
Now when ib_udata is passed to all the driver's object create/destroy APIs the ib_udata will carry the ib_ucontext for every user command. There is no need to also pass the ib_ucontext via the functions prototypes. Make ib_udata the only argument psssed. Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-04-01IB: Pass uverbs_attr_bundle down ib_x destroy pathShamir Rabinovitch4-18/+16
The uverbs_attr_bundle with the ucontext is sent down to the drivers ib_x destroy path as ib_udata. The next patch will use the ib_udata to free the drivers destroy path from the dependency in 'uobject->context' as we already did for the create path. Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-22RDMA: Handle ucontext allocations by IB/coreLeon Romanovsky3-27/+17
Following the PD conversion patch, do the same for ucontext allocations. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-11RDMA/ocrdma: Use for_each_sg_dma_page iterator on umem SGLShiraz, Saleem1-32/+23
Use the for_each_sg_dma_page iterator variant to walk the umem DMA-mapped SGL and get the page DMA address. This avoids the extra loop to iterate pages in the SGE when for_each_sg iterator is used. Additionally, purge umem->page_shift usage in the driver as its only relevant for ODP MRs. Use system page size and shift instead. Signed-off-by: Shiraz, Saleem <shiraz.saleem@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-08RDMA: Handle PD allocations by IB/coreLeon Romanovsky3-56/+43
The PD allocations in IB/core allows us to simplify drivers and their error flows in their .alloc_pd() paths. The changes in .alloc_pd() go hand in had with relevant update in .dealloc_pd(). We will use this opportunity and convert .dealloc_pd() to don't fail, as it was suggested a long time ago, failures are not happening as we have never seen a WARN_ON print. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-01-30RDMA: Provide safe ib_alloc_device() functionLeon Romanovsky1-1/+1
All callers to ib_alloc_device() provide a larger size than struct ib_device and rely on the fact that struct ib_device is embedded in their driver specific structure as the first member. Provide a safer variant of ib_alloc_device() that checks and enforces this approach to make sure the drivers are using it right. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-01-29Merge branch 'devx-async' into k.o/for-nextJason Gunthorpe3-12/+12
Yishai Hadas says: Enable DEVX asynchronous query commands This series enables querying a DEVX object in an asynchronous mode. The userspace application won't block when calling the firmware and it will be able to get the response back once that it will be ready. To enable the above functionality: - DEVX asynchronous command completion FD object was introduced. - The applicable file operations were implemented to enable using it by the user application. - Query asynchronous method was added to the DEVX object, it will call the firmware asynchronously and manages the response on the given input FD. - Hot unplug support was added for the FD to work properly upon unbind/disassociate. - mlx5 core fence for asynchronous commands was implemented and used to prevent racing upon unbind/disassociate. This branch is based on mlx5-next & v5.0-rc2 due to dependencies, from git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux * branch 'devx-async': IB/mlx5: Implement DEVX hot unplug for async command FD IB/mlx5: Implement the file ops of DEVX async command FD IB/mlx5: Introduce async DEVX obj query API IB/mlx5: Introduce MLX5_IB_OBJECT_DEVX_ASYNC_CMD_FD Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-01-25infiniband: prefix header search paths with $(srctree)/Masahiro Yamada1-1/+1
Currently, the Kbuild core manipulates header search paths in a crazy way [1]. To fix this mess, I want all Makefiles to add explicit $(srctree)/ to the search paths in the srctree. Some Makefiles are already written in that way, but not all. The goal of this work is to make the notation consistent, and finally get rid of the gross hacks. Having whitespaces after -I does not matter since commit 48f6e3cf5bc6 ("kbuild: do not drop -I without parameter"). [1]: https://patchwork.kernel.org/patch/9632347/ Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Parvi Kaustubhi <pkaustub@cisco.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-01-24infiniband: ocrdma: no need to check return value of debugfs_create functionsGreg Kroah-Hartman1-45/+22
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-01-14RDMA: Introduce and use rdma_device_to_ibdev()Parav Pandit1-2/+4
Introduce and use rdma_device_to_ibdev() API for those drivers which are registering one sysfs group and also use in ib_core. In subsequent patch, device->provider_ibdev one-to-one mapping is no longer holds true during accessing sysfs entries. Therefore, introduce an API rdma_device_to_ibdev() that provides such information. Signed-off-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-01-14RDMA: Rename port_callback to init_portParav Pandit1-1/+1
Most provider routines are callback routines which ib core invokes. _callback suffix doesn't convey information about when such callback is invoked. Therefore, rename port_callback to init_port. Additionally, store the init_port function pointer in ib_device_ops, so that it can be accessed in subsequent patches when binding rdma device to net namespace. Signed-off-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-01-10RDMA/ocrdma: Fix out of bounds index check in query pkeyGal Pressman1-1/+1
The pkey table size is one element, index should be tested for > 0 instead of > 1. Fixes: fe2caefcdf58 ("RDMA/ocrdma: Add driver for Emulex OneConnect IBoE RDMA adapter") Signed-off-by: Gal Pressman <galpress@amazon.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-01-10IB/{core,hw}: Have ib_umem_get extract the ib_ucontext from ib_udataJason Gunthorpe1-1/+1
ib_umem_get() can only be called in a method callback, which always has a udata parameter. This allows ib_umem_get() to derive the ucontext pointer directly from the udata without requiring the drivers to find it in some way or another. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>
2019-01-08cross-tree: phase out dma_zalloc_coherent()Luis Chamberlain3-12/+12
We already need to zero out memory for dma_alloc_coherent(), as such using dma_zalloc_coherent() is superflous. Phase it out. This change was generated with the following Coccinelle SmPL patch: @ replace_dma_zalloc_coherent @ expression dev, size, data, handle, flags; @@ -dma_zalloc_coherent(dev, size, handle, flags) +dma_alloc_coherent(dev, size, handle, flags) Suggested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> [hch: re-ran the script on the latest tree] Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-12-19RDMA: Mark if destroy address handle is in a sleepable contextGal Pressman2-2/+2
Introduce a 'flags' field to destroy address handle callback and add a flag that marks whether the callback is executed in an atomic context or not. This will allow drivers to wait for completion instead of polling for it when it is allowed. Signed-off-by: Gal Pressman <galpress@amazon.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-12-19RDMA: Mark if create address handle is in a sleepable contextGal Pressman2-2/+2
Introduce a 'flags' field to create address handle callback and add a flag that marks whether the callback is executed in an atomic context or not. This will allow drivers to wait for completion instead of polling for it when it is allowed. Signed-off-by: Gal Pressman <galpress@amazon.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-12-18RDMA: Cleanup undesired pd->uobject usageShamir Rabinovitch1-3/+4
Drivers should be using udata to determine if a method is invoked from user space or kernel space. A pd does not necessarily say a different objects is kernel or user. Transforming the tests to use udata eliminates a large number of uobject references from the drivers. Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-12-12RDMA/ocrdma: Initialize ib_device_ops structKamal Heib1-46/+46
Initialize ib_device_ops with the supported operations using ib_set_device_ops(). Signed-off-by: Kamal Heib <kamalheib1@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-12-11RDMA/ocrdma: Use PCI-ID as an identification in debugfsLeon Romanovsky1-2/+3
In opposite to current implementation of identification based on device name, PCI-ID identification provides stable names suitable for device rename. Change ocrdma debugfs representation to use PCI-ID. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Acked-by: Selvin Xavier <selvin.xavier@broadcom.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-12-11IB/{mlx5,ocrdma,qedr,rxe}: Omit port validation from IB verbsYuval Shaia1-12/+0
RDMA core layer already make sure port is valid, no need to check it here again. For the pkey validation this depends on commit b3ac5742fead ("RDMA/core: Validate port number in query_pkey verb") Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com> Acked-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-10-17RDMA/drivers: Use core provided API for registering device attributesParav Pandit1-40/+31
Use rdma_set_device_sysfs_group() to register device attributes and simplify the driver. Signed-off-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-10-03RDMA: Remove unused parameter from ib_modify_qp_is_ok()Kamal Heib1-2/+1
The ll parameter is not used in ib_modify_qp_is_ok(), so remove it. Signed-off-by: Kamal Heib <kamalheib1@gmail.com> Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-09-26RDMA/drivers: Use dev_name instead of ibdev->nameJason Gunthorpe1-1/+2
These return the same thing but dev_name is a more conventional use of the kernel API. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
2018-09-26RDMA/drivers: Use dev_err/dbg/etc instead of pr_* + ibdev->nameJason Gunthorpe1-1/+1
Kernel convention is that a driver for a subsystem will print using dev_* on the subsystem's struct device, or with dev_* on the physical device. Drivers should rarely use a pr_* function. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-09-26RDMA: Fully setup the device name in ib_register_deviceJason Gunthorpe1-2/+1
The current code has two copies of the device name, ibdev->dev and dev_name(&ibdev->dev), and they are setup at different times, which is very confusing. Set them both up at the same time and make dev_name() the lead name, which is the proper use of the driver core APIs. To make it very clear that the name is not valid until registration pass it in to the ib_register_device() call rather than messing with ibdev->name directly. Also the reorganization now checks that dev_name is unique even if it does not contain a %. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Acked-by: Adit Ranadive <aditr@vmware.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Acked-by: Devesh Sharma <devesh.sharma@broadcom.com> Reviewed-by: Shiraz Saleem <shiraz.saleem@intel.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
2018-07-30RDMA/providers: Remove pointless functionsKamal Heib3-8/+0
The rdma core is taking care of return the right error code when the rdma device callbacks aren't supported. Signed-off-by: Kamal Heib <kamalheib1@gmail.com> Acked-by: Shiraz Saleem <shiraz.saleem@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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