From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: Mischa Jonker <Mischa.Jonker@synopsys.com>
Cc: "joe@perches.com" <joe@perches.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] ARC: Fix __udelay calculation
Date: Fri, 30 Aug 2013 11:13:31 +0000 [thread overview]
Message-ID: <C2D7FE5348E1B147BCA15975FBA23075141223@IN01WEMBXA.internal.synopsys.com> (raw)
In-Reply-To: <1377856585-11078-1-git-send-email-mjonker@synopsys.com>
On 08/30/2013 03:26 PM, Mischa Jonker wrote:
> Cast usecs to u64, to ensure that the (usecs * 4295 * HZ)
> multiplication is 64 bit.
>
> Initially, the (usecs * 4295 * HZ) part was done as a 32 bit
> multiplication, with the result casted to 64 bit. This led to some bits
> falling off, causing a "DMA initialization error" in the stmmac Ethernet
> driver, due to a premature timeout.
>
> Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
>
Applied.
Thx,
-Vineet
prev parent reply other threads:[~2013-08-30 11:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-30 9:56 Mischa Jonker
2013-08-30 11:13 ` Vineet Gupta [this message]
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