Merge remote branch 'origin' into secretlab/next-devicetree

Merging in current state of Linus' tree to deal with merge conflicts and
build failures in vio.c after merge.

Conflicts:
	drivers/i2c/busses/i2c-cpm.c
	drivers/i2c/busses/i2c-mpc.c
	drivers/net/gianfar.c

Also fixed up one line in arch/powerpc/kernel/vio.c to use the
correct node pointer.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 76 insertions, 42 deletions

diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 17cb400ecd6a..bd2a50b482ac 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -108,7 +108,7 @@ static const struct sctp_paramhdr prsctp_param = {
 	cpu_to_be16(sizeof(struct sctp_paramhdr)),
 };
 
-/* A helper to initialize to initialize an op error inside a
+/* A helper to initialize an op error inside a
  * provided chunk, as most cause codes will be embedded inside an
  * abort chunk.
  */
@@ -125,6 +125,29 @@ void  sctp_init_cause(struct sctp_chunk *chunk, __be16 cause_code,
 	chunk->subh.err_hdr = sctp_addto_chunk(chunk, sizeof(sctp_errhdr_t), &err);
 }
 
+/* A helper to initialize an op error inside a
+ * provided chunk, as most cause codes will be embedded inside an
+ * abort chunk.  Differs from sctp_init_cause in that it won't oops
+ * if there isn't enough space in the op error chunk
+ */
+int sctp_init_cause_fixed(struct sctp_chunk *chunk, __be16 cause_code,
+		      size_t paylen)
+{
+	sctp_errhdr_t err;
+	__u16 len;
+
+	/* Cause code constants are now defined in network order.  */
+	err.cause = cause_code;
+	len = sizeof(sctp_errhdr_t) + paylen;
+	err.length  = htons(len);
+
+	if (skb_tailroom(chunk->skb) < len)
+		return -ENOSPC;
+	chunk->subh.err_hdr = sctp_addto_chunk_fixed(chunk,
+						     sizeof(sctp_errhdr_t),
+						     &err);
+	return 0;
+}
 /* 3.3.2 Initiation (INIT) (1)
  *
  * This chunk is used to initiate a SCTP association between two
@@ -208,7 +231,8 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
 	sp = sctp_sk(asoc->base.sk);
 	num_types = sp->pf->supported_addrs(sp, types);
 
-	chunksize = sizeof(init) + addrs_len + SCTP_SAT_LEN(num_types);
+	chunksize = sizeof(init) + addrs_len;
+	chunksize += WORD_ROUND(SCTP_SAT_LEN(num_types));
 	chunksize += sizeof(ecap_param);
 
 	if (sctp_prsctp_enable)
@@ -238,14 +262,14 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
 		/* Add HMACS parameter length if any were defined */
 		auth_hmacs = (sctp_paramhdr_t *)asoc->c.auth_hmacs;
 		if (auth_hmacs->length)
-			chunksize += ntohs(auth_hmacs->length);
+			chunksize += WORD_ROUND(ntohs(auth_hmacs->length));
 		else
 			auth_hmacs = NULL;
 
 		/* Add CHUNKS parameter length */
 		auth_chunks = (sctp_paramhdr_t *)asoc->c.auth_chunks;
 		if (auth_chunks->length)
-			chunksize += ntohs(auth_chunks->length);
+			chunksize += WORD_ROUND(ntohs(auth_chunks->length));
 		else
 			auth_chunks = NULL;
 
@@ -255,7 +279,8 @@ struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,
 
 	/* If we have any extensions to report, account for that */
 	if (num_ext)
-		chunksize += sizeof(sctp_supported_ext_param_t) + num_ext;
+		chunksize += WORD_ROUND(sizeof(sctp_supported_ext_param_t) +
+					num_ext);
 
 	/* RFC 2960 3.3.2 Initiation (INIT) (1)
 	 *
@@ -397,13 +422,13 @@ struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *asoc,
 
 		auth_hmacs = (sctp_paramhdr_t *)asoc->c.auth_hmacs;
 		if (auth_hmacs->length)
-			chunksize += ntohs(auth_hmacs->length);
+			chunksize += WORD_ROUND(ntohs(auth_hmacs->length));
 		else
 			auth_hmacs = NULL;
 
 		auth_chunks = (sctp_paramhdr_t *)asoc->c.auth_chunks;
 		if (auth_chunks->length)
-			chunksize += ntohs(auth_chunks->length);
+			chunksize += WORD_ROUND(ntohs(auth_chunks->length));
 		else
 			auth_chunks = NULL;
 
@@ -412,17 +437,25 @@ struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *asoc,
 	}
 
 	if (num_ext)
-		chunksize += sizeof(sctp_supported_ext_param_t) + num_ext;
+		chunksize += WORD_ROUND(sizeof(sctp_supported_ext_param_t) +
+					num_ext);
 
 	/* Now allocate and fill out the chunk.  */
 	retval = sctp_make_chunk(asoc, SCTP_CID_INIT_ACK, 0, chunksize);
 	if (!retval)
 		goto nomem_chunk;
 
-	/* Per the advice in RFC 2960 6.4, send this reply to
-	 * the source of the INIT packet.
+	/* RFC 2960 6.4 Multi-homed SCTP Endpoints
+	 *
+	 * An endpoint SHOULD transmit reply chunks (e.g., SACK,
+	 * HEARTBEAT ACK, * etc.) to the same destination transport
+	 * address from which it received the DATA or control chunk
+	 * to which it is replying.
+	 *
+	 * [INIT ACK back to where the INIT came from.]
 	 */
 	retval->transport = chunk->transport;
+
 	retval->subh.init_hdr =
 		sctp_addto_chunk(retval, sizeof(initack), &initack);
 	retval->param_hdr.v = sctp_addto_chunk(retval, addrs_len, addrs.v);
@@ -461,18 +494,6 @@ struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *asoc,
 	/* We need to remove the const qualifier at this point.  */
 	retval->asoc = (struct sctp_association *) asoc;
 
-	/* RFC 2960 6.4 Multi-homed SCTP Endpoints
-	 *
-	 * An endpoint SHOULD transmit reply chunks (e.g., SACK,
-	 * HEARTBEAT ACK, * etc.) to the same destination transport
-	 * address from which it received the DATA or control chunk
-	 * to which it is replying.
-	 *
-	 * [INIT ACK back to where the INIT came from.]
-	 */
-	if (chunk)
-		retval->transport = chunk->transport;
-
 nomem_chunk:
 	kfree(cookie);
 nomem_cookie:
@@ -1129,6 +1150,24 @@ nodata:
 	return retval;
 }
 
+/* Create an Operation Error chunk of a fixed size,
+ * specifically, max(asoc->pathmtu, SCTP_DEFAULT_MAXSEGMENT)
+ * This is a helper function to allocate an error chunk for
+ * for those invalid parameter codes in which we may not want
+ * to report all the errors, if the incomming chunk is large
+ */
+static inline struct sctp_chunk *sctp_make_op_error_fixed(
+	const struct sctp_association *asoc,
+	const struct sctp_chunk *chunk)
+{
+	size_t size = asoc ? asoc->pathmtu : 0;
+
+	if (!size)
+		size = SCTP_DEFAULT_MAXSEGMENT;
+
+	return sctp_make_op_error_space(asoc, chunk, size);
+}
+
 /* Create an Operation Error chunk.  */
 struct sctp_chunk *sctp_make_op_error(const struct sctp_association *asoc,
 				 const struct sctp_chunk *chunk,
@@ -1210,7 +1249,6 @@ struct sctp_chunk *sctp_chunkify(struct sk_buff *skb,
 	INIT_LIST_HEAD(&retval->list);
 	retval->skb		= skb;
 	retval->asoc		= (struct sctp_association *)asoc;
-	retval->resent  	= 0;
 	retval->has_tsn		= 0;
 	retval->has_ssn         = 0;
 	retval->rtt_in_progress	= 0;
@@ -1371,6 +1409,18 @@ void *sctp_addto_chunk(struct sctp_chunk *chunk, int len, const void *data)
 	return target;
 }
 
+/* Append bytes to the end of a chunk. Returns NULL if there isn't sufficient
+ * space in the chunk
+ */
+void *sctp_addto_chunk_fixed(struct sctp_chunk *chunk,
+			     int len, const void *data)
+{
+	if (skb_tailroom(chunk->skb) >= len)
+		return sctp_addto_chunk(chunk, len, data);
+	else
+		return NULL;
+}
+
 /* Append bytes from user space to the end of a chunk.  Will panic if
  * chunk is not big enough.
  * Returns a kernel err value.
@@ -1974,13 +2024,12 @@ static sctp_ierror_t sctp_process_unk_param(const struct sctp_association *asoc,
 		 * returning multiple unknown parameters.
 		 */
 		if (NULL == *errp)
-			*errp = sctp_make_op_error_space(asoc, chunk,
-					ntohs(chunk->chunk_hdr->length));
+			*errp = sctp_make_op_error_fixed(asoc, chunk);
 
 		if (*errp) {
-			sctp_init_cause(*errp, SCTP_ERROR_UNKNOWN_PARAM,
+			sctp_init_cause_fixed(*errp, SCTP_ERROR_UNKNOWN_PARAM,
 					WORD_ROUND(ntohs(param.p->length)));
-			sctp_addto_chunk(*errp,
+			sctp_addto_chunk_fixed(*errp,
 					WORD_ROUND(ntohs(param.p->length)),
 					param.v);
 		} else {
@@ -3315,21 +3364,6 @@ int sctp_process_asconf_ack(struct sctp_association *asoc,
 	sctp_chunk_free(asconf);
 	asoc->addip_last_asconf = NULL;
 
-	/* Send the next asconf chunk from the addip chunk queue. */
-	if (!list_empty(&asoc->addip_chunk_list)) {
-		struct list_head *entry = asoc->addip_chunk_list.next;
-		asconf = list_entry(entry, struct sctp_chunk, list);
-
-		list_del_init(entry);
-
-		/* Hold the chunk until an ASCONF_ACK is received. */
-		sctp_chunk_hold(asconf);
-		if (sctp_primitive_ASCONF(asoc, asconf))
-			sctp_chunk_free(asconf);
-		else
-			asoc->addip_last_asconf = asconf;
-	}
-
 	return retval;
 }