From: Sakari Ailus <sakari.ailus@iki.fi>
To: Abhai Kollara <abhai@protonmail.com>
Cc: Hans de Goede <hansg@kernel.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-media@vger.kernel.org, linux-staging@lists.linux.dev,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] staging: media: atomisp: gc2235: prefer usleep_range over msleep
Date: Thu, 16 Apr 2026 12:44:28 +0300 [thread overview]
Message-ID: <aeCvfE46XvGmXR--@valkosipuli.retiisi.eu> (raw)
In-Reply-To: <20260319204242.2076191-1-abhai@protonmail.com>
On Thu, Mar 19, 2026 at 08:42:47PM +0000, Abhai Kollara wrote:
> The gc2235 driver uses msleep(5) during power-up. msleep() is often
> imprecise for durations under 20ms. Replace it with usleep_range()
> to provide better precision.
>
> Signed-off-by: Abhai Kollara <abhai@protonmail.com>
> ---
> drivers/staging/media/atomisp/i2c/atomisp-gc2235.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c b/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
> index d3414312e1de..db5e007efc56 100644
> --- a/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
> +++ b/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
> @@ -433,7 +433,7 @@ static int power_up(struct v4l2_subdev *sd)
> goto fail_power;
> }
>
> - msleep(5);
> + usleep_range(5000, 6000);
I'd rather use fsleep() here.
> return 0;
>
> fail_clk:
--
Sakari Ailus
next prev parent reply other threads:[~2026-04-16 9:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-18 21:27 [PATCH] staging: atomisp: gc2235: prefer usleep_range over msleep Abhai Kollara
2026-03-19 20:42 ` [PATCH v2] staging: media: " Abhai Kollara
2026-04-16 9:44 ` Sakari Ailus [this message]
2026-04-18 20:18 ` [PATCH v3] staging: media: atomisp: gc2235: prefer fsleep " Abhai Kollara
2026-04-18 22:08 ` Sakari Ailus
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