IB/srp: Fix possible send queue overflow
When using work request based memory registration (fast_reg) we must reserve SQ entries for registration and invalidation in addition to send operations. Each IO consumes 3 SQ entries (registration, send, invalidation) so we need to allocate 3x larger send-queue instead of 2x. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> CC: Stable <stable@vger.kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Doug Ledford <dledford@redhat.com>
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