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staging: ath6kl: Fixing disappearing of scan list due to jiffies wrap over 

When jiffies wrap-over, all the BSS in the cache is removed. Wrap-over of
jiffies is not handled in the correct way. This cause the scan list to go
empty during this time for a small duration

Signed-off-by: Vipin Mehta <vmehta@atheros.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Vipin Mehta 2011-02-18 13:13:16 -08:00 committed by Greg Kroah-Hartman
parent 28f7e85a4b
commit d0e0086893
2 changed files with 5 additions and 4 deletions
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2
drivers/staging/ath6kl/os/linux/include/osapi_linux.h
View File

@ -121,7 +121,7 @@ typedef spinlock_t A_MUTEX_T;
/* Get current time in ms adding a constant offset (in ms) */
#define A_GET_MS(offset) \
(jiffies + ((offset) / 1000) * HZ)
(((jiffies / HZ) * 1000) + (offset))
/*
* Timer Functions

7
drivers/staging/ath6kl/wlan/src/wlan_node.c
View File

@ -122,7 +122,7 @@ wlan_setup_node(struct ieee80211_node_table *nt, bss_t *ni,
timeoutValue = nt->nt_nodeAge;
ni->ni_tstamp = A_GET_MS (timeoutValue);
ni->ni_tstamp = A_GET_MS (0);
ni->ni_actcnt = WLAN_NODE_INACT_CNT;
IEEE80211_NODE_LOCK_BH(nt);
@ -360,7 +360,7 @@ wlan_refresh_inactive_nodes (struct ieee80211_node_table *nt)
if (A_MEMCMP(myBssid, bss->ni_macaddr, sizeof(myBssid)) != 0)
{
if (bss->ni_tstamp <= now || --bss->ni_actcnt == 0)
if (((now - bss->ni_tstamp) > timeoutValue) || --bss->ni_actcnt == 0)
{
/*
* free up all but the current bss - if set
@ -381,6 +381,7 @@ wlan_node_timeout (A_ATH_TIMER arg)
bss_t *bss, *nextBss;
u8 myBssid[IEEE80211_ADDR_LEN], reArmTimer = false;
u32 timeoutValue = 0;
u32 now = A_GET_MS(0);
timeoutValue = nt->nt_nodeAge;
@ -393,7 +394,7 @@ wlan_node_timeout (A_ATH_TIMER arg)
if (A_MEMCMP(myBssid, bss->ni_macaddr, sizeof(myBssid)) != 0)
{
if (bss->ni_tstamp <= A_GET_MS(0))
if ((now - bss->ni_tstamp) > timeoutValue)
{
/*
* free up all but the current bss - if set