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Date:   Tue, 24 Mar 2020 12:09:30 +0100
From:   Wolfram Sang <wsa@the-dreams.de>
To:     Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc:     ajayg@nvidia.com,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        "open list:I2C CONTROLLER DRIVER FOR NVIDIA GPU" 
        <linux-i2c@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] i2c: nvidia-gpu: Handle timeout correctly in
 gpu_i2c_check_status()
Message-ID: <20200324110930.GH1134@ninjato>
References: <20200311165806.12365-1-kai.heng.feng@canonical.com>
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>  	} while (time_is_after_jiffies(target));
> =20
> -	if (time_is_before_jiffies(target)) {
> +	if (time_is_before_eq_jiffies(target)) {

While unlikely, there is a tiny race between the time_is_* calls,
jiffies could update inbetween them.

So, for the sake of good programming practice, I'd recommend to set a
flag in the do_while-loop and the have the logic above solely based on
the flag.


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