From: Doug Anderson <dianders@chromium.org>
Date: Wed, 5 Jun 2013 20:56:33 +0000 (-0700)
Subject: ARM: exynos: add debug_ll_io_init() call in exynos_init_io()
X-Git-Tag: v3.10-rc5~4^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9c1fcdccc7ce5611ec1edf45dbbe51b10e333bd3;p=pandora-kernel.git

ARM: exynos: add debug_ll_io_init() call in exynos_init_io()

If the early MMU mapping of the UART happens to get booted out of the
TLB between the start of paging_init() and when we finally re-add the
UART at the very end of s3c_init_cpu(), we'll get a hang at bootup if
we've got early_printk enabled.  Avoid this hang by calling
debug_ll_io_init() early.

Without this patch, you can reliably reproduce a hang when early
printk is enabled by adding flush_tlb_all() at the start of
exynos_init_io().  After this patch the hang goes away.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
---

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