path: root/drivers/infiniband/core/uverbs_ioctl.c
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authorJason Gunthorpe <jgg@mellanox.com>2018-07-25 21:40:17 -0600
committerJason Gunthorpe <jgg@mellanox.com>2018-08-01 14:55:48 -0600
commitbbd51e881ff05aa6dccda025e335438f3b3a1dba (patch)
tree719d347f1f7e3145abed708ca69a3db82366ee16 /drivers/infiniband/core/uverbs_ioctl.c
parentIB/uverbs: Lower the test for ongoing disassociation (diff)
IB/uverbs: Do not pass struct ib_device to the write based methods
This is a step to get rid of the global check for disassociation. In this model, the ib_dev is not proven to be valid by the core code and cannot be provided to the method. Instead, every method decides if it is able to run after disassociation and obtains the ib_dev using one of three different approaches: - Call srcu_dereference on the udevice's ib_dev. As before, this means the method cannot be called after disassociation begins. (eg alloc ucontext) - Retrieve the ib_dev from the ucontext, via ib_uverbs_get_ucontext() - Retrieve the ib_dev from the uobject->object after checking under SRCU if disassociation has started (eg uobj_get) Largely, the code is all ready for this, the main work is to provide a ib_dev after calling uobj_alloc(). The few other places simply use ib_uverbs_get_ucontext() to get the ib_dev. This flexibility will let the next patches allow destroy to operate after disassociation. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/uverbs_ioctl.c')
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