RDMA/core: Remove unused ib_ud_header_unpack

ib_ud_header_unpack() is unused, and I can't see any sign of it
ever having been used in git. The only reference I can find
is from December 2004 BKrev: 41d30034XNbBUl0XnyC6ig9V61Nf-A when
it looks like it was added.

Remove it.

Signed-off-by: Dr. David Alan Gilbert <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Reviewed-by: Kalesh AP <[e-mail]>
Signed-off-by: Leon Romanovsky <[e-mail]>

drivers/infiniband/core/ud_header.c

···
 	return len;
 }
 EXPORT_SYMBOL(ib_ud_header_pack);
-
-/**
- * ib_ud_header_unpack - Unpack UD header struct from wire format
- * @header:UD header struct
- * @buf:Buffer to pack into
- *
- * ib_ud_header_pack() unpacks the UD header structure @header from wire
- * format in the buffer @buf.
- */
-int ib_ud_header_unpack(void                *buf,
-			struct ib_ud_header *header)
-{
-	ib_unpack(lrh_table, ARRAY_SIZE(lrh_table),
-		  buf, &header->lrh);
-	buf += IB_LRH_BYTES;
-
-	if (header->lrh.link_version != 0) {
-		pr_warn("Invalid LRH.link_version %u\n",
-			header->lrh.link_version);
-		return -EINVAL;
-	}
-
-	switch (header->lrh.link_next_header) {
-	case IB_LNH_IBA_LOCAL:
-		header->grh_present = 0;
-		break;
-
-	case IB_LNH_IBA_GLOBAL:
-		header->grh_present = 1;
-		ib_unpack(grh_table, ARRAY_SIZE(grh_table),
-			  buf, &header->grh);
-		buf += IB_GRH_BYTES;
-
-		if (header->grh.ip_version != 6) {
-			pr_warn("Invalid GRH.ip_version %u\n",
-				header->grh.ip_version);
-			return -EINVAL;
-		}
-		if (header->grh.next_header != 0x1b) {
-			pr_warn("Invalid GRH.next_header 0x%02x\n",
-				header->grh.next_header);
-			return -EINVAL;
-		}
-		break;
-
-	default:
-		pr_warn("Invalid LRH.link_next_header %u\n",
-			header->lrh.link_next_header);
-		return -EINVAL;
-	}
-
-	ib_unpack(bth_table, ARRAY_SIZE(bth_table),
-		  buf, &header->bth);
-	buf += IB_BTH_BYTES;
-
-	switch (header->bth.opcode) {
-	case IB_OPCODE_UD_SEND_ONLY:
-		header->immediate_present = 0;
-		break;
-	case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE:
-		header->immediate_present = 1;
-		break;
-	default:
-		pr_warn("Invalid BTH.opcode 0x%02x\n", header->bth.opcode);
-		return -EINVAL;
-	}
-
-	if (header->bth.transport_header_version != 0) {
-		pr_warn("Invalid BTH.transport_header_version %u\n",
-			header->bth.transport_header_version);
-		return -EINVAL;
-	}
-
-	ib_unpack(deth_table, ARRAY_SIZE(deth_table),
-		  buf, &header->deth);
-	buf += IB_DETH_BYTES;
-
-	if (header->immediate_present)
-		memcpy(&header->immediate_data, buf, sizeof header->immediate_data);
-
-	return 0;
-}
-EXPORT_SYMBOL(ib_ud_header_unpack);

include/rdma/ib_pack.h

···
 int ib_ud_header_pack(struct ib_ud_header *header,
 		      void                *buf);
 
-int ib_ud_header_unpack(void                *buf,
-			struct ib_ud_header *header);
-
 #endif /* IB_PACK_H */