Subject: [PATCH/RFC 2/2] arm/tegra: add timeout to PCIe PLL lock detection loop

From: [email-masked] (Stephen Warren)
Date: Tue, 06 Mar 2012 09:58:50 -0700

On 03/06/2012 01:45 AM, Dmitry Artamonow wrote:
> Tegra PCIe driver waits for PLL to lock using busy loop.
> If PLL fails to lock for some reason, this leads to silent lockup
> while booting (as PCIe code is not modular).
> 
> Fix by adding timeout, so if PLL doesn't lock in a couple
> of seconds, just PCIe driver fails and machine continues to boot.
> 
> Signed-off-by: Dmitry Artamonow <[email-masked]>

That seems reasonable. So once the mdelay discussion is resolved,

Acked-by: Stephen Warren <[email-masked]>

Any idea why the PLL doesn't lock sometimes?