linux-kernel - Re: [PATCH v2] ARM: Tegra: Make tegra_dma_init a postcore

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Date:	Wed, 23 Feb 2011 11:26:33 -0800
From:	Olof Johansson <olof@...om.net>
To:	Stephen Warren <swarren@...dia.com>
Cc:	ccross@...roid.com, linux-tegra@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux@....linux.org.uk, konkers@...roid.com
Subject: Re: [PATCH v2] ARM: Tegra: Make tegra_dma_init a postcore_initcall

On Wed, Feb 23, 2011 at 9:41 AM, Stephen Warren <swarren@...dia.com> wrote:
> The following commit makes the Tegra APB DMA engine fail to initialize
> correctly: 0cf6230af909a86f81907455eca2a5c9b8f68fe6
> ARM: tegra: Move tegra_common_init to tegra_init_early
>
> The reason is that tegra_init_early_ calls tegra_dma_init which calls
> request_threaded_irq, which fails since the IRQ hasn't yet been marked
> valid; that only happens in tegra_init_irq, which gets called after
> tegra_init_early.
>
> This used to work OK, since tegra_init_early was tegra_common_init, which
> got called after tegra_init_irq, basically from the beginning of
> tegra_harmony_init.
>
> Solve this by converting tegra_dma_init to a postcore_initcall. This makes
> it execute late enough that IRQs are marked valid, and avoids having to
> add it back to every machine's init function.
>
> Signed-off-by: Stephen Warren <swarren@...dia.com>

Acked-by: Olof Johansson <olof@...om.net>
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