FreeBSD/src f653f39 (r318802)sys/ofed/drivers/infiniband/core uverbs_main.c

MFC r314131:

Avoid NULL dereference in a couple of sysctl handlers in ibcore.
iw_cxgbe sets ib_device->dma_device to NULL (since r311880).

Sponsored by:   Chelsio Communications
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+2-2sys/ofed/drivers/infiniband/core/uverbs_main.c
+2-21 files

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