[PATCH] staging: rtlwifi: rtlwifi: use ktime_get_real_seconds() for suspend time

From: Arnd Bergmann
Date: Tue Nov 07 2017 - 05:44:47 EST


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 <arnd@xxxxxxxx>
---
This duplicates what I did for the regular (non-staging) rtlwifi driver
---
drivers/staging/rtlwifi/core.c | 8 ++------
drivers/staging/rtlwifi/wifi.h | 2 +-
2 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/rtlwifi/core.c b/drivers/staging/rtlwifi/core.c
index b00e51df984f..a43d37452e8b 100644
--- a/drivers/staging/rtlwifi/core.c
+++ b/drivers/staging/rtlwifi/core.c
@@ -509,15 +509,13 @@ 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);
@@ -536,7 +534,6 @@ 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;

RT_TRACE(rtlpriv, COMP_POWER, DBG_DMESG, "\n");
rtlhal->driver_is_goingto_unload = false;
@@ -544,8 +541,7 @@ 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)
+ if (ktime_get_real_seconds() - rtlhal->last_suspend_sec < 5)
return -1;

rtl_op_start(hw);
diff --git a/drivers/staging/rtlwifi/wifi.h b/drivers/staging/rtlwifi/wifi.h
index eb91c130b245..ca0243fa2e66 100644
--- a/drivers/staging/rtlwifi/wifi.h
+++ b/drivers/staging/rtlwifi/wifi.h
@@ -1670,7 +1670,7 @@ 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