From: "Vladimir A. Barinov" <vbarinov@ru.mvista.com>
To: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org, ppopov@embeddedalley.com
Subject: Re: [PATCH] Philips PNX8550 ip3106 driver deadlock fix
Date: Tue, 06 Dec 2005 21:03:00 +0300 [thread overview]
Message-ID: <4395D254.9060203@ru.mvista.com> (raw)
In-Reply-To: <20051206180035.GG2698@linux-mips.org>
Ralf Baechle wrote:
>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.
>
>
Ok, thank you.
> Ralf
>
>
>
>
prev parent reply other threads:[~2005-12-06 18:03 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
2005-12-06 18:03 ` Vladimir A. Barinov [this message]
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