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| author |   Jason Gunthorpe <jgg@mellanox.com> | 2020-01-08 20:05:34 +0200 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-01-16 15:55:45 -0400 |
| commit | a1123418ba1078037d9fecb72573ff7222dfe201 (patch) | |
| tree | a4e50f11d441719574089c2d0bd7e0d5c3aefde7 /drivers/infiniband/core/uverbs_main.c | |
| parent | RDMA/core: Remove ucontext_lock from the uverbs_destry_ufile_hw() path (diff) | |
| download | linux-dev-a1123418ba1078037d9fecb72573ff7222dfe201.tar.xz linux-dev-a1123418ba1078037d9fecb72573ff7222dfe201.zip | |
RDMA/uverbs: Add ioctl command to get a device context
Allow future extensions of the get context command through the uverbs
ioctl kabi.
Unlike the uverbs version this does not return an async_fd as well, that
has to be done with another command.
Link: https://lore.kernel.org/r/1578506740-22188-5-git-send-email-yishaih@mellanox.com
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/uverbs_main.c')
| -rw-r--r-- | drivers/infiniband/core/uverbs_main.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index fb9e75257607..2d4083bf4a04 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -150,6 +150,9 @@ void ib_uverbs_release_uevent(struct ib_uevent_object *uobj) READ_ONCE(uobj->uobject.ufile->async_file); struct ib_uverbs_event *evt, *tmp; + if (!async_file) + return; + spin_lock_irq(&async_file->ev_queue.lock); list_for_each_entry_safe(evt, tmp, &uobj->event_list, obj_list) { list_del(&evt->list); @@ -391,6 +394,9 @@ ib_uverbs_async_handler(struct ib_uverbs_async_event_file *async_file, struct ib_uverbs_event *entry; unsigned long flags; + if (!async_file) + return; + spin_lock_irqsave(&async_file->ev_queue.lock, flags); if (async_file->ev_queue.is_closed) { spin_unlock_irqrestore(&async_file->ev_queue.lock, flags); @@ -476,12 +482,13 @@ void ib_uverbs_init_async_event_file( ib_uverbs_init_event_queue(&async_file->ev_queue); /* The first async_event_file becomes the default one for the file. */ - lockdep_assert_held(&uverbs_file->ucontext_lock); + mutex_lock(&uverbs_file->ucontext_lock); if (!uverbs_file->async_file) { /* Pairs with the put in ib_uverbs_release_file */ uverbs_uobject_get(&async_file->uobj); smp_store_release(&uverbs_file->async_file, async_file); } + mutex_unlock(&uverbs_file->ucontext_lock); INIT_IB_EVENT_HANDLER(&async_file->event_handler, ib_dev, ib_uverbs_event_handler); |