From: "Andrew E. Mileski" <andrewm@isoar.ca>
To: linux-mtd@lists.infradead.org
Subject: Re: [PATCH] nand_wait_ready() timeout scaling
Date: Wed, 30 Apr 2008 15:46:17 -0400 [thread overview]
Message-ID: <4818CC89.2010106@isoar.ca> (raw)
In-Reply-To: <1209583375-11136-1-git-send-email-andrewm@isoar.ca>
Andrew E. Mileski wrote:
> The nand_wait_ready() timeout was hardcoded to 2 jiffies, which does not
> scale with the system timer frequency. Using a guess of a 250 Hz system
> timer frequency, I believe the timeout was meant to be 8 ms. This patch
> sets an 8 ms timeout that scales with the system timer frequency.
>
> Tested with a 1000 Hz system timer frequency and with a device requiring
> at least a 3 ms timeout.
Just realized that 100 Hz systems would have a problem with this patch
since (100 * 8) / 1000 = 0. Guess the simple solution is to make the
timeout 10 ms.
--
Andrew E. Mileski
next prev parent reply other threads:[~2008-04-30 19:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-30 19:22 [PATCH] nand_wait_ready() timeout scaling Andrew E. Mileski
2008-04-30 19:46 ` Andrew E. Mileski [this message]
2008-04-30 20:19 ` Trent Piepho
2008-04-30 20:55 ` Andrew E. Mileski
2008-07-14 20:32 ` Andrew E. Mileski
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