linux-kernel - [PATCH 2/3] staging: r8188eu: remove rtw_usleep

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Message-Id: <20220602194807.281115-3-martin@kaiser.cx>
Date:   Thu,  2 Jun 2022 21:48:06 +0200
From:   Martin Kaiser <martin@...ser.cx>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Michael Straube <straube.linux@...il.com>,
        Pavel Skripkin <paskripkin@...il.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Martin Kaiser <martin@...ser.cx>
Subject: [PATCH 2/3] staging: r8188eu: remove rtw_usleep_os

Remove the rtw_usleep_os helper function. There are only two callers, both
of which call rtw_usleep_os(100).

The original code would translate rtw_usleep_os(100) into msleep(1). Using
msleep for < 20ms is not recommended. Replace the msleep calls with
usleep_range, based on the explanations in
Documentation/timers/timers-howto.rst.

Signed-off-by: Martin Kaiser <martin@...ser.cx>
---
 drivers/staging/r8188eu/core/rtw_pwrctrl.c      | 2 +-
 drivers/staging/r8188eu/hal/rtl8188e_hal_init.c | 2 +-
 drivers/staging/r8188eu/include/osdep_service.h | 2 --
 drivers/staging/r8188eu/os_dep/osdep_service.c  | 8 --------
 4 files changed, 2 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_pwrctrl.c b/drivers/staging/r8188eu/core/rtw_pwrctrl.c
index 7b816b824947..11fd05633529 100644
--- a/drivers/staging/r8188eu/core/rtw_pwrctrl.c
+++ b/drivers/staging/r8188eu/core/rtw_pwrctrl.c
@@ -266,7 +266,7 @@ static s32 LPS_RF_ON_check(struct adapter *padapter, u32 delay_ms)
 			err = -1;
 			break;
 		}
-		rtw_usleep_os(100);
+		usleep_range(1000, 1200);
 	}
 
 	return err;
diff --git a/drivers/staging/r8188eu/hal/rtl8188e_hal_init.c b/drivers/staging/r8188eu/hal/rtl8188e_hal_init.c
index e17375a74f17..1aa7d01b67b1 100644
--- a/drivers/staging/r8188eu/hal/rtl8188e_hal_init.c
+++ b/drivers/staging/r8188eu/hal/rtl8188e_hal_init.c
@@ -208,7 +208,7 @@ static void efuse_read_phymap_from_txpktbuf(
 		rtw_write8(adapter, REG_TXPKTBUF_DBG, 0);
 		timeout = jiffies + msecs_to_jiffies(1000);
 		while (!rtw_read8(adapter, REG_TXPKTBUF_DBG) && time_before(jiffies, timeout))
-			rtw_usleep_os(100);
+			usleep_range(1000, 1200);
 
 		/* data from EEPROM needs to be in LE */
 		lo32 = cpu_to_le32(rtw_read32(adapter, REG_PKTBUF_DBG_DATA_L));
diff --git a/drivers/staging/r8188eu/include/osdep_service.h b/drivers/staging/r8188eu/include/osdep_service.h
index f1a703643e74..e5fce24e5a33 100644
--- a/drivers/staging/r8188eu/include/osdep_service.h
+++ b/drivers/staging/r8188eu/include/osdep_service.h
@@ -77,8 +77,6 @@ void *rtw_malloc2d(int h, int w, int size);
 		spin_lock_init(&((q)->lock));			\
 	} while (0)
 
-void rtw_usleep_os(int us);
-
 static inline unsigned char _cancel_timer_ex(struct timer_list *ptimer)
 {
 	return del_timer_sync(ptimer);
diff --git a/drivers/staging/r8188eu/os_dep/osdep_service.c b/drivers/staging/r8188eu/os_dep/osdep_service.c
index 812acd59be79..3504a0a9ba87 100644
--- a/drivers/staging/r8188eu/os_dep/osdep_service.c
+++ b/drivers/staging/r8188eu/os_dep/osdep_service.c
@@ -42,14 +42,6 @@ Otherwise, there will be racing condition.
 Caller must check if the list is empty before calling rtw_list_delete
 */
 
-void rtw_usleep_os(int us)
-{
-	if (1 < (us / 1000))
-		msleep(1);
-	else
-		msleep((us / 1000) + 1);
-}
-
 static const struct device_type wlan_type = {
 	.name = "wlan",
 };
-- 
2.30.2