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IB/qib: Add fix missing from earlier patch 

The upstream code was missing part of a receive/error race fix from
the internal tree.  Add the missing part, which makes future merges
possible.

Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Mike Marciniszyn 2011-01-10 17:42:21 -08:00 committed by Roland Dreier
parent 2528ea60f9
commit 057ae62fac
1 changed files with 24 additions and 31 deletions
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55
drivers/infiniband/hw/qib/qib_ud.c
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@ -445,13 +445,14 @@ void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
qkey = be32_to_cpu(ohdr->u.ud.deth[0]);
src_qp = be32_to_cpu(ohdr->u.ud.deth[1]) & QIB_QPN_MASK;
/* Get the number of bytes the message was padded by. */
/*
* Get the number of bytes the message was padded by
* and drop incomplete packets.
*/
pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
if (unlikely(tlen < (hdrsize + pad + 4))) {
/* Drop incomplete packets. */
ibp->n_pkt_drops++;
goto bail;
}
if (unlikely(tlen < (hdrsize + pad + 4)))
goto drop;
tlen -= hdrsize + pad + 4;
/*
@ -460,10 +461,8 @@ void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
*/
if (qp->ibqp.qp_num) {
if (unlikely(hdr->lrh[1] == IB_LID_PERMISSIVE ||
hdr->lrh[3] == IB_LID_PERMISSIVE)) {
ibp->n_pkt_drops++;
goto bail;
}
hdr->lrh[3] == IB_LID_PERMISSIVE))
goto drop;
if (qp->ibqp.qp_num > 1) {
u16 pkey1, pkey2;
@ -476,7 +475,7 @@ void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
0xF,
src_qp, qp->ibqp.qp_num,
hdr->lrh[3], hdr->lrh[1]);
goto bail;
return;
}
}
if (unlikely(qkey != qp->qkey)) {
@ -484,30 +483,24 @@ void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
(be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF,
src_qp, qp->ibqp.qp_num,
hdr->lrh[3], hdr->lrh[1]);
goto bail;
return;
}
/* Drop invalid MAD packets (see 13.5.3.1). */
if (unlikely(qp->ibqp.qp_num == 1 &&
(tlen != 256 ||
(be16_to_cpu(hdr->lrh[0]) >> 12) == 15))) {
ibp->n_pkt_drops++;
goto bail;
}
(be16_to_cpu(hdr->lrh[0]) >> 12) == 15)))
goto drop;
} else {
struct ib_smp *smp;
/* Drop invalid MAD packets (see 13.5.3.1). */
if (tlen != 256 || (be16_to_cpu(hdr->lrh[0]) >> 12) != 15) {
ibp->n_pkt_drops++;
goto bail;
}
if (tlen != 256 || (be16_to_cpu(hdr->lrh[0]) >> 12) != 15)
goto drop;
smp = (struct ib_smp *) data;
if ((hdr->lrh[1] == IB_LID_PERMISSIVE ||
hdr->lrh[3] == IB_LID_PERMISSIVE) &&
smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
ibp->n_pkt_drops++;
goto bail;
}
smp->mgmt_class != IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
goto drop;
}
/*
@ -523,10 +516,8 @@ void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
} else if (opcode == IB_OPCODE_UD_SEND_ONLY) {
wc.ex.imm_data = 0;
wc.wc_flags = 0;
} else {
ibp->n_pkt_drops++;
goto bail;
}
} else
goto drop;
/*
* A GRH is expected to preceed the data even if not
@ -556,8 +547,7 @@ void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
/* Silently drop packets which are too big. */
if (unlikely(wc.byte_len > qp->r_len)) {
qp->r_flags |= QIB_R_REUSE_SGE;
ibp->n_pkt_drops++;
return;
goto drop;
}
if (has_grh) {
qib_copy_sge(&qp->r_sge, &hdr->u.l.grh,
@ -594,5 +584,8 @@ void qib_ud_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
qib_cq_enter(to_icq(qp->ibqp.recv_cq), &wc,
(ohdr->bth[0] &
cpu_to_be32(IB_BTH_SOLICITED)) != 0);
bail:;
return;
drop:
ibp->n_pkt_drops++;
}