linux-kernel - [PATCH] staging: av7110: Replace msleep() with usleep

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Message-ID: <20250626172707.10115-1-pratibimbakhadka@gmail.com>
Date: Thu, 26 Jun 2025 23:12:03 +0545
From: Pratibimba Khadka <pratibimbakhadka@...il.com>
To: mchehab@...nel.org
Cc: Pratibimba Khadka <pratibimbakhadka@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	linux-media@...r.kernel.org (open list:MEDIA INPUT INFRASTRUCTURE (V4L/DVB)),
	linux-staging@...ts.linux.dev (open list:STAGING SUBSYSTEM),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] staging: av7110: Replace msleep() with usleep_range() in tuner function

Replace msleep(10) with usleep_range(10000, 12000) in the PLL lock
waiting loop of nexusca_stv0297_tuner_set_params().

usleep_range() is preferred over msleep() for short delays (< 20ms) as
it provides better accuracy and allows the scheduler flexibility for
power management optimizations. The 10-12ms range maintains the same
timing behavior while giving the kernel scheduler room to optimize.

This change improves timing precision during the PLL lock detection
phase without affecting the overall functionality of the tuner
configuration process.

Signed-off-by: Pratibimba Khadka <pratibimbakhadka@...il.com>
---
 drivers/staging/media/av7110/av7110.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/media/av7110/av7110.c b/drivers/staging/media/av7110/av7110.c
index bc9a2a40afcb..7f6c610579c8 100644
--- a/drivers/staging/media/av7110/av7110.c
+++ b/drivers/staging/media/av7110/av7110.c
@@ -1827,7 +1827,7 @@ static int nexusca_stv0297_tuner_set_params(struct dvb_frontend *fe)
 		if (i2c_transfer(&av7110->i2c_adap, &readmsg, 1) == 1)
 			if (data[0] & 0x40)
 				break;
-		msleep(10);
+		usleep_range(10000, 12000);
 	}

 	return 0;
-- 
2.49.0