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Re: [PATCH] MIPS: loongson: fix random early boot hang

To: Aaro Koskinen <aaro.koskinen@iki.fi>
Subject: Re: [PATCH] MIPS: loongson: fix random early boot hang
From: Ralf Baechle <ralf@linux-mips.org>
Date: Wed, 13 Mar 2013 14:41:37 +0100
Cc: linux-mips@linux-mips.org
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On Tue, Feb 19, 2013 at 02:00:39AM +0200, Aaro Koskinen wrote:

> Subject: [PATCH] MIPS: loongson: fix random early boot hang
> 
> Some Loongson boards (e.g. Lemote FuLoong mini-PC) use ISA/southbridge
> device (CS5536 general purpose timer) for the timer interrupt. It starts
> running early and is already enabled during the PCI configuration,
> during which there is a small window in pci_read_base() when the register
> access is temporarily disabled. If the timer interrupts at this point,
> the system will hang. Fix this by adding a fixup that keeps the register
> access always enabled.

Applied, though a bit late.  I really was hoping for one of the Lemote
folks to chime in.

Thanks Aaro,

  Ralf

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