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Date:	Thu, 17 Jul 2014 17:22:38 +0300
From:	Andrey Utkin <>
Cc:,,, Andrey Utkin <>
Subject: [PATCH] arch/mips/net/bpf_jit.c: fix failure check

static int pkt_type_offset(void) returned -1 in case of failure, and actual
(positive) offset value in case of success. In the only instance of its usage,
the result was saved to local "unsigned int off" variable, which is used in a
lot of places in the same (large) function, so changing its type could cause
many warnings. So new signed int variable was added.

Reported-by: David Binderman <>
Signed-off-by: Andrey Utkin <>
 arch/mips/net/bpf_jit.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/mips/net/bpf_jit.c b/arch/mips/net/bpf_jit.c
index b87390a..918b341 100644
--- a/arch/mips/net/bpf_jit.c
+++ b/arch/mips/net/bpf_jit.c
@@ -793,6 +793,7 @@ static int build_body(struct jit_ctx *ctx)
 	const struct sock_filter *inst;
 	unsigned int i, off, load_order, condt;
 	u32 k, b_off __maybe_unused;
+	int tmp;
 	for (i = 0; i < prog->len; i++) {
 		u16 code;
@@ -1332,9 +1333,9 @@ jmp_cmp:
 			ctx->flags |= SEEN_SKB;
-			off = pkt_type_offset();
+			tmp = off = pkt_type_offset();
-			if (off < 0)
+			if (tmp < 0)
 				return -1;
 			emit_load_byte(r_tmp, r_skb, off, ctx);
 			/* Keep only the last 3 bits */

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