From: Ralf Baechle <ralf@linux-mips.org>
To: "Vladimir A. Barinov" <vbarinov@ru.mvista.com>
Cc: linux-mips@linux-mips.org, ppopov@embeddedalley.com
Subject: Re: [PATCH] Philips PNX8550 ip3106 driver deadlock fix
Date: Tue, 6 Dec 2005 18:00:35 +0000 [thread overview]
Message-ID: <20051206180035.GG2698@linux-mips.org> (raw)
In-Reply-To: <4395D05C.9060408@ru.mvista.com>
On Tue, Dec 06, 2005 at 08:54:36PM +0300, Vladimir A. Barinov wrote:
> This is a patch that fixes spin_lock deadlock in serial ip3106 driver.
> The spin_lock_irq(&port->lock,flags) is already called in generic driver
> serial_core.c before
> port->ops->start_tx().
> So the second call of spin_lock_irq(&port->lock, flags) leads to
> deadlock. This could be verified in PREEMPT_DESCTOP case when
> these options are enabled:
> CONFIG_DEBUG_PREEMPT=y
> CONFIG_DEBUG_SPINLOCK=y
Serial drivers are maintained by rmk+serial@arm.linux.org.uk, please send
to him.
Ralf
next prev parent reply other threads:[~2005-12-06 18:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-06 17:54 [PATCH] Philips PNX8550 ip3106 driver deadlock fix Vladimir A. Barinov
2005-12-06 18:00 ` Ralf Baechle [this message]
2005-12-06 18:03 ` Vladimir A. Barinov
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