linux-kernel - Re: [PATCH] tty: omap-serial: fix boot hang by converting to use a threaded IRQ handler (was Re: [PATCH] irq: always set IRQF_ONESHOT if no primary handler is specified)

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Date:	Tue, 23 Aug 2011 09:57:11 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Paul Walmsley <paul@...an.com>
Cc:	linux-serial@...r.kernel.org, Alan Cox <alan@...ux.intel.com>,
	Pantelis Antoniou <pantelis.antoniou@...il.com>,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Felipe Balbi <balbi@...com>, torvalds@...ux-foundation.org,
	mporter@...com, Kevin Hilman <khilman@...com>,
	"Govindraj.R" <govindraj.raja@...com>
Subject: Re: [PATCH] tty: omap-serial: fix boot hang by converting to use a
 threaded IRQ handler (was Re: [PATCH] irq: always set IRQF_ONESHOT if no
 primary handler is specified)

On Mon, 22 Aug 2011 23:10:21 -0600 (MDT)
Paul Walmsley <paul@...an.com> wrote:

> 
> Convert the omap-serial hardirq handler to a threaded IRQ handler. Without 
> this patch, OMAP boards which use the on-board OMAP UARTs and the 
> omap-serial driver will not boot to userspace after commit 
> f3637a5f2e2eb391ff5757bc83fb5de8f9726464 ("irq: Always set IRQF_ONESHOT if 
> no primary handler is specified").  Enabling CONFIG_DEBUG_SHIRQ reveals 
> 'IRQ handler type mismatch' errors:

There are multiple other drivers reporting all these problems - the
faulty irq change should be reverted at this point not the drivers
fiddled with.

Alan
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