wl1271: Update TX packet life time handling with higher resolution time
This patch uses a higher precision timer to synchronize with the firmware
clock. Improved precision is needed as on some platforms a jiffy may be up to
tens of milliseconds, and the required precision is closer to TU's.
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Teemu Paasikivi <ext-teemu.3.paasikivi@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/wl12xx/wl1271_tx.c b/drivers/net/wireless/wl12xx/wl1271_tx.c
index 7926471..a32d301 100644
--- a/drivers/net/wireless/wl12xx/wl1271_tx.c
+++ b/drivers/net/wireless/wl12xx/wl1271_tx.c
@@ -86,8 +86,10 @@
static int wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb,
u32 extra, struct ieee80211_tx_info *control)
{
+ struct timespec ts;
struct wl1271_tx_hw_descr *desc;
int pad, ac;
+ s64 hosttime;
u16 tx_attr;
desc = (struct wl1271_tx_hw_descr *) skb->data;
@@ -101,8 +103,9 @@
}
/* configure packet life time */
- desc->start_time = cpu_to_le32(jiffies_to_usecs(jiffies) -
- wl->time_offset);
+ getnstimeofday(&ts);
+ hosttime = (timespec_to_ns(&ts) >> 10);
+ desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
/* configure the tx attributes */