[PATCH 2/3] rtlwifi: use ktime_get_real_seconds() for suspend time

[Arnd Bergmann]

do_gettimeofday() is deprecated and slower than necessary for the purpose
of reading the seconds. This changes rtl_op_suspend/resume to use
ktime_get_real_seconds() instead, which is simpler and avoids confusion
about whether it is y2038-safe or not.

Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
 drivers/net/wireless/realtek/rtlwifi/core.c         | 10 ++++------
 drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c |  3 +--
 drivers/net/wireless/realtek/rtlwifi/wifi.h         |  2 +-
 3 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/core.c 
b/drivers/net/wireless/realtek/rtlwifi/core.c
index 1147327e6f52..533e9cc4c84b 100644
--- a/drivers/net/wireless/realtek/rtlwifi/core.c
+++ b/drivers/net/wireless/realtek/rtlwifi/core.c
@@ -550,15 +550,13 @@ static int rtl_op_suspend(struct ieee80211_hw *hw,
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
        struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
-       struct timeval ts;
 
        RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, "\n");
        if (WARN_ON(!wow))
                return -EINVAL;
 
        /* to resolve s4 can not wake up*/
-       do_gettimeofday(&ts);
-       rtlhal->last_suspend_sec = ts.tv_sec;
+       rtlhal->last_suspend_sec = ktime_get_real_seconds();
 
        if ((ppsc->wo_wlan_mode & WAKE_ON_PATTERN_MATCH) && wow->n_patterns)
                _rtl_add_wowlan_patterns(hw, wow);
@@ -577,7 +575,7 @@ static int rtl_op_resume(struct ieee80211_hw *hw)
        struct rtl_priv *rtlpriv = rtl_priv(hw);
        struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
        struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
-       struct timeval ts;
+       time64_t now;
 
        RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, "\n");
        rtlhal->driver_is_goingto_unload = false;
@@ -585,8 +583,8 @@ static int rtl_op_resume(struct ieee80211_hw *hw)
        rtlhal->wake_from_pnp_sleep = true;
 
        /* to resovle s4 can not wake up*/
-       do_gettimeofday(&ts);
-       if (ts.tv_sec - rtlhal->last_suspend_sec < 5)
+       now = ktime_get_real_seconds();
+       if (now - rtlhal->last_suspend_sec < 5)
                return -1;
 
        rtl_op_start(hw);
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c 
b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
index 20ffe856180e..ad28e188bd04 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
@@ -1373,8 +1373,7 @@ static void _rtl8821ae_get_wakeup_reason(struct 
ieee80211_hw *hw)
 
        ppsc->wakeup_reason = 0;
 
-       do_gettimeofday(&ts);
-       rtlhal->last_suspend_sec = ts.tv_sec;
+       rtlhal->last_suspend_sec = ktime_get_real_seconds();
 
        switch (fw_reason) {
        case FW_WOW_V2_PTK_UPDATE_EVENT:
diff --git a/drivers/net/wireless/realtek/rtlwifi/wifi.h 
b/drivers/net/wireless/realtek/rtlwifi/wifi.h
index 22afc14c3da6..6f1b0f4667d9 100644
--- a/drivers/net/wireless/realtek/rtlwifi/wifi.h
+++ b/drivers/net/wireless/realtek/rtlwifi/wifi.h
@@ -1599,7 +1599,7 @@ struct rtl_hal {
        bool enter_pnp_sleep;
        bool wake_from_pnp_sleep;
        bool wow_enabled;
-       __kernel_time_t last_suspend_sec;
+       time64_t last_suspend_sec;
        u32 wowlan_fwsize;
        u8 *wowlan_firmware;
 
-- 
2.9.0