[PATCH net-next v2 0/5] 6lowpan: trivial changes

[PATCH net-next v2 0/5] 6lowpan: trivial changes

[Alexander Aring]

This patch series includes some trivial changes to prepare the 6lowpan stack
for upcomming patch-series which mainly fix fragmentation according to rfc4944
and udp handling(which is currently broken).

Changes since v2:
  - change intendation in patch 3/5
  - fix typo in 5/5 unecessary -> unnecessary
  - add missing 6lowpan tag in cover-letter

Alexander Aring (5):
  6lowpan: remove unnecessary ret variable
  6lowpan: remove unnecessary check on err >= 0
  6lowpan: use netdev_alloc_skb instead dev_alloc_skb
  6lowpan: remove skb->dev assignment
  6lowpan: remove unnecessary break

 net/ieee802154/6lowpan.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

-- 
1.8.4.1

[PATCH net-next v2 1/5] 6lowpan: remove unnecessary ret variable

[Alexander Aring]

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Reviewed-by: Werner Almesberger <werner@almesberger.net>
---
 net/ieee802154/6lowpan.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index ff41b4d..d288035 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -1120,7 +1120,7 @@ lowpan_fragment_xmit(struct sk_buff *skb, u8 *head,
 			int mlen, int plen, int offset, int type)
 {
 	struct sk_buff *frag;
-	int hlen, ret;
+	int hlen;
 
 	hlen = (type == LOWPAN_DISPATCH_FRAG1) ?
 			LOWPAN_FRAG1_HEAD_SIZE : LOWPAN_FRAGN_HEAD_SIZE;
@@ -1145,9 +1145,7 @@ lowpan_fragment_xmit(struct sk_buff *skb, u8 *head,
 	lowpan_raw_dump_table(__func__, " raw fragment dump", frag->data,
 								frag->len);
 
-	ret = dev_queue_xmit(frag);
-
-	return ret;
+	return dev_queue_xmit(frag);
 }
 
 static int
-- 
1.8.4.1

[PATCH net-next v2 2/5] 6lowpan: remove unnecessary check on err >= 0

[Alexander Aring]

The err variable can only be zero in this case.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Reviewed-by: Werner Almesberger <werner@almesberger.net>
---
 net/ieee802154/6lowpan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index d288035..9057f83 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -1179,7 +1179,7 @@ lowpan_skb_fragmentation(struct sk_buff *skb, struct net_device *dev)
 	head[0] &= ~LOWPAN_DISPATCH_FRAG1;
 	head[0] |= LOWPAN_DISPATCH_FRAGN;
 
-	while ((payload_length - offset > 0) && (err >= 0)) {
+	while (payload_length - offset > 0) {
 		int len = LOWPAN_FRAG_SIZE;
 
 		head[4] = offset / 8;
-- 
1.8.4.1

[PATCH net-next v2 3/5] 6lowpan: use netdev_alloc_skb instead dev_alloc_skb

[Alexander Aring]

This patch uses the netdev_alloc_skb instead dev_alloc_skb function and
drops the seperate assignment to skb->dev.

Signed-off-by: Alexander Aring <alex.aring-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Reviewed-by: Werner Almesberger <werner-SEdMjqphH88wryQfseakQg@public.gmane.org>
---
 net/ieee802154/6lowpan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 9057f83..1884a84 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -1127,12 +1127,12 @@ lowpan_fragment_xmit(struct sk_buff *skb, u8 *head,
 
 	lowpan_raw_dump_inline(__func__, "6lowpan fragment header", head, hlen);
 
-	frag = dev_alloc_skb(hlen + mlen + plen + IEEE802154_MFR_SIZE);
+	frag = netdev_alloc_skb(skb->dev, hlen + mlen +
+				plen + IEEE802154_MFR_SIZE);
 	if (!frag)
 		return -ENOMEM;
 
 	frag->priority = skb->priority;
-	frag->dev = skb->dev;
 
 	/* copy header, MFR and payload */
 	memcpy(skb_put(frag, mlen), skb->data, mlen);
-- 
1.8.4.1


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Re: [PATCH net-next v2 3/5] 6lowpan: use netdev_alloc_skb instead dev_alloc_skb

[Alexander Aring]

On Sat, Oct 26, 2013 at 03:54:00PM +0200, Alexander Aring wrote:
> This patch uses the netdev_alloc_skb instead dev_alloc_skb function and
> drops the seperate assignment to skb->dev.
> 
> Signed-off-by: Alexander Aring <alex.aring-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Reviewed-by: Werner Almesberger <werner-SEdMjqphH88wryQfseakQg@public.gmane.org>
> ---
>  net/ieee802154/6lowpan.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
> index 9057f83..1884a84 100644
> --- a/net/ieee802154/6lowpan.c
> +++ b/net/ieee802154/6lowpan.c
> @@ -1127,12 +1127,12 @@ lowpan_fragment_xmit(struct sk_buff *skb, u8 *head,
>  
>  	lowpan_raw_dump_inline(__func__, "6lowpan fragment header", head, hlen);
>  
> -	frag = dev_alloc_skb(hlen + mlen + plen + IEEE802154_MFR_SIZE);
> +	frag = netdev_alloc_skb(skb->dev, hlen + mlen +
> +				plen + IEEE802154_MFR_SIZE);
mhh, I do the same mistake again. I will resend them.

Sorry for the noise.

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[PATCH net-next v2 4/5] 6lowpan: remove skb->dev assignment

[Alexander Aring]

This patch removes the assignment of skb->dev. We don't need it here because
we use the netdev_alloc_skb_ip_align function which already sets the
skb->dev.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Reviewed-by: Werner Almesberger <werner@almesberger.net>
---
 net/ieee802154/6lowpan.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 1884a84..665b118 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -785,7 +785,6 @@ lowpan_alloc_new_frame(struct sk_buff *skb, u16 len, u16 tag)
 		goto skb_err;
 
 	frame->skb->priority = skb->priority;
-	frame->skb->dev = skb->dev;
 
 	/* reserve headroom for uncompressed ipv6 header */
 	skb_reserve(frame->skb, sizeof(struct ipv6hdr));
-- 
1.8.4.1

[PATCH net-next v2 5/5] 6lowpan: remove unnecessary break

[Alexander Aring]

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Reviewed-by: Werner Almesberger <werner@almesberger.net>
---
 net/ieee802154/6lowpan.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 665b118..6d75038 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -440,7 +440,6 @@ lowpan_uncompress_udp_header(struct sk_buff *skb, struct udphdr *uh)
 		default:
 			pr_debug("ERROR: unknown UDP format\n");
 			goto err;
-			break;
 		}
 
 		pr_debug("uncompressed UDP ports: src = %d, dst = %d\n",
-- 
1.8.4.1