RDMA/cxgb4: Use refcount_t instead of atomic_t for reference counting
The refcount_t API will WARN on underflow and overflow of a reference counter, and avoid use-after-free risks. Link: https://lore.kernel.org/r/1622194663-2383-12-git-send-email-liweihang@huawei.com Cc: Potnuri Bharat Teja <bharat@chelsio.com> Signed-off-by: Weihang Li <liweihang@huawei.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
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