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From: Greg KH <gregkh@suse.de>
To: Richard Zhao <linuxzsc@gmail.com>
Cc: linux-serial@vger.kernel.org
Subject: Re: uart ops tx_empty lock
Date: Sat, 12 Feb 2011 08:11:04 -0800	[thread overview]
Message-ID: <20110212161104.GA26545@suse.de> (raw)
In-Reply-To: <AANLkTimpEcfmJ5SF_YpG1mE0eBiARQ7L17Pd+ay_OQoV@mail.gmail.com>

On Sat, Feb 12, 2011 at 09:16:45PM +0800, Richard Zhao wrote:
> Hi Greg,
> 
> Does uart_ops.tx_empty need to hold port->lock?
> I find some drivers hold the lock in tx_empty hook, for example 8250.
> But many more drivers don't hold it, for example imx.c, sh-sci.c.

I do not know, Alan would know best about this.

Alan?

thanks,

greg k-h

      reply	other threads:[~2011-02-12 16:14 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-12 13:16 uart ops tx_empty lock Richard Zhao
2011-02-12 16:11 ` Greg KH [this message]

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