From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed, 23 Jan 2019 06:45:25 +0000 (-0800)
Subject: nfp: bpf: don't use instruction number for jump target
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e90287f3aaf666c9e18e60f889f82ecfb0ee3c5d;p=openwrt%2Fstaging%2Fblogic.git

nfp: bpf: don't use instruction number for jump target

Instruction number is meaningless at code gen phase.  The target
of the instruction is overwritten by nfp_fixup_branches().  The
convention is to put the raw offset in target address as a place
holder.  See cmp_* functions.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index e23ca90289f7..323587dee498 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -3182,7 +3182,7 @@ bpf_to_bpf_call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
 		wrp_immed_relo(nfp_prog, imm_b(nfp_prog), 0, RELO_IMMED_REL);
 	} else {
 		ret_tgt = nfp_prog_current_offset(nfp_prog) + 2;
-		emit_br(nfp_prog, BR_UNC, meta->n + 1 + meta->insn.imm, 1);
+		emit_br(nfp_prog, BR_UNC, meta->insn.imm, 1);
 		offset_br = nfp_prog_current_offset(nfp_prog);
 	}
 	wrp_immed_relo(nfp_prog, ret_reg(nfp_prog), ret_tgt, RELO_IMMED_REL);