[PATCH net 4/4] sctp: fix some type cast warnings introduced since very beginning

[Xin Long]

These warnings were found by running 'make C=2 M=net/sctp/'.
They are there since very beginning.

Note after this patch, there still one warning left in
sctp_outq_flush():
  sctp_chunk_fail(chunk, SCTP_ERROR_INV_STRM)

Since it has been moved to sctp_stream_outq_migrate on net-next,
to avoid the extra job when merging net-next to net, I will post
the fix for it after the merging is done.

Reported-by: Eric Dumazet <eduma...@google.com>
Signed-off-by: Xin Long <lucien....@gmail.com>
---
 include/linux/sctp.h      | 2 +-
 include/uapi/linux/sctp.h | 2 +-
 net/sctp/ipv6.c           | 2 +-
 net/sctp/sm_make_chunk.c  | 4 ++--
 net/sctp/sm_sideeffect.c  | 4 ++--
 5 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/linux/sctp.h b/include/linux/sctp.h
index 09d7412..da803df 100644
--- a/include/linux/sctp.h
+++ b/include/linux/sctp.h
@@ -231,7 +231,7 @@ struct sctp_datahdr {
        __be32 tsn;
        __be16 stream;
        __be16 ssn;
-       __be32 ppid;
+       __u32 ppid;
        __u8  payload[0];
 };
 
diff --git a/include/uapi/linux/sctp.h b/include/uapi/linux/sctp.h
index 6217ff8..84fc291 100644
--- a/include/uapi/linux/sctp.h
+++ b/include/uapi/linux/sctp.h
@@ -376,7 +376,7 @@ struct sctp_remote_error {
        __u16 sre_type;
        __u16 sre_flags;
        __u32 sre_length;
-       __u16 sre_error;
+       __be16 sre_error;
        sctp_assoc_t sre_assoc_id;
        __u8 sre_data[0];
 };
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 7fe9e1d1..a6dfa86 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -738,7 +738,7 @@ static int sctp_v6_skb_iif(const struct sk_buff *skb)
 /* Was this packet marked by Explicit Congestion Notification? */
 static int sctp_v6_is_ce(const struct sk_buff *skb)
 {
-       return *((__u32 *)(ipv6_hdr(skb))) & htonl(1 << 20);
+       return *((__u32 *)(ipv6_hdr(skb))) & (__force __u32)htonl(1 << 20);
 }
 
 /* Dump the v6 addr to the seq file. */
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 57c5504..514465b 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -2854,7 +2854,7 @@ struct sctp_chunk *sctp_make_asconf_update_ip(struct 
sctp_association *asoc,
                addr_param_len = af->to_addr_param(addr, &addr_param);
                param.param_hdr.type = flags;
                param.param_hdr.length = htons(paramlen + addr_param_len);
-               param.crr_id = i;
+               param.crr_id = htonl(i);
 
                sctp_addto_chunk(retval, paramlen, &param);
                sctp_addto_chunk(retval, addr_param_len, &addr_param);
@@ -2867,7 +2867,7 @@ struct sctp_chunk *sctp_make_asconf_update_ip(struct 
sctp_association *asoc,
                addr_param_len = af->to_addr_param(addr, &addr_param);
                param.param_hdr.type = SCTP_PARAM_DEL_IP;
                param.param_hdr.length = htons(paramlen + addr_param_len);
-               param.crr_id = i;
+               param.crr_id = htonl(i);
 
                sctp_addto_chunk(retval, paramlen, &param);
                sctp_addto_chunk(retval, addr_param_len, &addr_param);
diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 8f2762b..e2d9a4b 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -1607,12 +1607,12 @@ static int sctp_cmd_interpreter(enum sctp_event 
event_type,
                        break;
 
                case SCTP_CMD_INIT_FAILED:
-                       sctp_cmd_init_failed(commands, asoc, cmd->obj.err);
+                       sctp_cmd_init_failed(commands, asoc, cmd->obj.u32);
                        break;
 
                case SCTP_CMD_ASSOC_FAILED:
                        sctp_cmd_assoc_failed(commands, asoc, event_type,
-                                             subtype, chunk, cmd->obj.err);
+                                             subtype, chunk, cmd->obj.u32);
                        break;
 
                case SCTP_CMD_INIT_COUNTER_INC:
-- 
2.1.0