linux-kernel - Boot Hang - mmotm 090716 - serial 8250 irq flags support

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Message-Id: <1248291948.4490.67.camel@useless.americas.hpqcorp.net>
Date:	Wed, 22 Jul 2009 15:45:48 -0400
From:	Lee Schermerhorn <Lee.Schermerhorn@...com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Vikram Pandita <vikram.pandita@...com>,
	Alan Cox <alan@...ux.intel.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	Eric Whitney <eric.whitney@...com>
Subject: Boot Hang - mmotm 090716 - serial 8250 irq flags support

The mmotm dated 17jul09 atop 2.6.31-rc3 hangs [or appears to--could have
just lost remote access via virtual serial port] during boot on HP
Proliant DL585 [and perhaps others].  Checking back, the last mmotm to
boot successfully on this platform was the 25jun09 snapshot.

The offending patch appears to be commit
0b8d7a6fbba81ffd06de701fa6178916ee9732c3 - "serial-add-irqflags-support"
in the linux-next mega-patch.  Reverting the changes to the 8250 driver
allows the kernel to boot and operate normally.

Regards,
Lee

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