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qcacld-3.0: Do not acquire rx wake lock for non local ARP

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Propagation from qcacld-2.0 to qcacld-3.0

Currently even for non local ARP requests wake lock is getting
acquired which is preventing the system suspend which is a power
penalty. Do not acquire wake lock for the non local ARP requests.

Change-Id: I5fcd0cf0edc5c28a4662ae49a33cc55a77f3d3e4
CRs-Fixed: 1088974
This commit is contained in:
Sravan Kumar Kairam 2017-01-04 15:27:56 +05:30 • committed by snandini
commit 2fc4755bc7
1 changed files with 62 additions and 4 deletions
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66
core/hdd/src/wlan_hdd_tx_rx.c
View file

@ -41,6 +41,7 @@
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <linux/inetdevice.h>
#include <cds_sched.h>
#include <cds_utils.h>
@ -1016,6 +1017,62 @@ static bool hdd_is_mcast_replay(struct sk_buff *skb)
return false;
}
/**
* hdd_is_arp_local() - check if local or non local arp
* @skb: pointer to sk_buff
*
* Return: true if local arp or false otherwise.
*/
static bool hdd_is_arp_local(struct sk_buff *skb)
{
struct arphdr *arp;
struct in_ifaddr **ifap = NULL;
struct in_ifaddr *ifa = NULL;
struct in_device *in_dev;
unsigned char *arp_ptr;
__be32 tip;
arp = (struct arphdr *)skb->data;
if (arp->ar_op == htons(ARPOP_REQUEST)) {
in_dev = __in_dev_get_rtnl(skb->dev);
if (in_dev) {
for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL;
ifap = &ifa->ifa_next) {
if (!strcmp(skb->dev->name, ifa->ifa_label))
break;
}
}
if (ifa && ifa->ifa_local) {
arp_ptr = (unsigned char *)(arp + 1);
arp_ptr += (skb->dev->addr_len + 4 +
skb->dev->addr_len);
memcpy(&tip, arp_ptr, 4);
hdd_info("ARP packet: local IP: %x dest IP: %x",
ifa->ifa_local, tip);
if (ifa->ifa_local != tip)
return false;
}
}
return true;
}
/**
* hdd_is_rx_wake_lock_needed() - check if wake lock is needed
* @skb: pointer to sk_buff
*
* Return: true if wake lock is needed or false otherwise.
*/
static bool hdd_is_rx_wake_lock_needed(struct sk_buff *skb)
{
if ((skb->pkt_type != PACKET_BROADCAST &&
skb->pkt_type != PACKET_MULTICAST) || hdd_is_arp_local(skb))
return true;
return false;
}
/**
* hdd_rx_packet_cbk() - Receive packet handler
* @context: pointer to HDD context
@ -1038,7 +1095,7 @@ QDF_STATUS hdd_rx_packet_cbk(void *context, qdf_nbuf_t rxBuf)
hdd_station_ctx_t *pHddStaCtx = NULL;
unsigned int cpu_index;
struct qdf_mac_addr *mac_addr;
bool wake_lock = false;
/* Sanity check on inputs */
if (unlikely((NULL == context) || (NULL == rxBuf))) {
@ -1127,9 +1184,10 @@ QDF_STATUS hdd_rx_packet_cbk(void *context, qdf_nbuf_t rxBuf)
}
/* hold configurable wakelock for unicast traffic */
if (pHddCtx->config->rx_wakelock_timeout &&
skb->pkt_type != PACKET_BROADCAST &&
skb->pkt_type != PACKET_MULTICAST) {
if (pHddCtx->config->rx_wakelock_timeout)
wake_lock = hdd_is_rx_wake_lock_needed(skb);
if (wake_lock) {
cds_host_diag_log_work(&pHddCtx->rx_wake_lock,
pHddCtx->config->rx_wakelock_timeout,
WIFI_POWER_EVENT_WAKELOCK_HOLD_RX);