[PATCH net-next] net: dsa: lan9303: Only allocate 3 ports

Save 2628 bytes on arm eabi by allocate only the required 3 ports.

Now that ds->num_ports is correct: In net/dsa/tag_lan9303.c
eliminate duplicate LAN9303_MAX_PORTS, use ds->num_ports.
(Matching the pattern of other net/dsa/tag_xxx.c files.)

Signed-off-by: Egil Hjelmeland <redacted>
---
 drivers/net/dsa/lan9303-core.c | 2 +-
 net/dsa/tag_lan9303.c          | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index 15befd155251..46fc1d5d3c9e 100644
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c

@@ -811,7 +811,7 @@ static struct dsa_switch_ops lan9303_switch_ops = {
 
 static int lan9303_register_switch(struct lan9303 *chip)
 {
-	chip->ds = dsa_switch_alloc(chip->dev, DSA_MAX_PORTS);
+	chip->ds = dsa_switch_alloc(chip->dev, LAN9303_NUM_PORTS);
 	if (!chip->ds)
 		return -ENOMEM;
 

diff --git a/net/dsa/tag_lan9303.c b/net/dsa/tag_lan9303.c
index 247774d149f9..e23e7635fa00 100644
--- a/net/dsa/tag_lan9303.c
+++ b/net/dsa/tag_lan9303.c

@@ -39,7 +39,6 @@
  */
 
 #define LAN9303_TAG_LEN 4
-#define LAN9303_MAX_PORTS 3
 
 static struct sk_buff *lan9303_xmit(struct sk_buff *skb, struct net_device *dev)
 {

@@ -104,7 +103,7 @@ static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev,
 
 	source_port = ntohs(lan9303_tag[1]) & 0x3;
 
-	if (source_port >= LAN9303_MAX_PORTS) {
+	if (source_port >= ds->num_ports) {
 		dev_warn_ratelimited(&dev->dev, "Dropping packet due to invalid source port\n");
 		return NULL;
 	}

-- 
2.11.0

On 08/07/2017 03:22 PM, Egil Hjelmeland wrote:

Save 2628 bytes on arm eabi by allocate only the required 3 ports.

Now that ds->num_ports is correct: In net/dsa/tag_lan9303.c
eliminate duplicate LAN9303_MAX_PORTS, use ds->num_ports.
(Matching the pattern of other net/dsa/tag_xxx.c files.)

Signed-off-by: Egil Hjelmeland <redacted>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian

Egil Hjelmeland [off-list ref] writes:

Save 2628 bytes on arm eabi by allocate only the required 3 ports.

Now that ds->num_ports is correct: In net/dsa/tag_lan9303.c
eliminate duplicate LAN9303_MAX_PORTS, use ds->num_ports.
(Matching the pattern of other net/dsa/tag_xxx.c files.)

Signed-off-by: Egil Hjelmeland <redacted>

Reviewed-by: Vivien Didelot <redacted>

From: Egil Hjelmeland <redacted>
Date: Tue,  8 Aug 2017 00:22:21 +0200

Save 2628 bytes on arm eabi by allocate only the required 3 ports.

Now that ds->num_ports is correct: In net/dsa/tag_lan9303.c
eliminate duplicate LAN9303_MAX_PORTS, use ds->num_ports.
(Matching the pattern of other net/dsa/tag_xxx.c files.)

Signed-off-by: Egil Hjelmeland <redacted>

Applied.