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authorMike Marciniszyn <mike.marciniszyn@qlogic.com>2011-01-11 04:42:21 +0300
committerRoland Dreier <rolandd@cisco.com>2011-01-11 04:42:21 +0300
commit057ae62faceccb50b0c2387af60dbbbcd40aab84 (patch)
treee606a9f0c458306e7c4b6645aa1f3ba8a548145c /drivers/infiniband/hw/qib/qib_ud.c
parent2528ea60f94ef9e1e1cd82066d55f62a1d19fde1 (diff)
downloadlinux-057ae62faceccb50b0c2387af60dbbbcd40aab84.tar.xz
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>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_ud.c')
-rw-r--r--drivers/infiniband/hw/qib/qib_ud.c55
1 files changed, 24 insertions, 31 deletions
diff --git a/drivers/infiniband/hw/qib/qib_ud.c b/drivers/infiniband/hw/qib/qib_ud.c
index a4b945d9a303..4a51fd1e9cb7 100644
--- a/drivers/infiniband/hw/qib/qib_ud.c
+++ b/drivers/infiniband/hw/qib/qib_ud.c
@@ -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++;
}