linux-kernel - Re: [PATCH] tty_ioctl: Fix the baud_table check in encode_baud

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Date:	Tue, 23 Oct 2007 18:27:52 +0100 (BST)
From:	"Maciej W. Rozycki" <macro@...ux-mips.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tty_ioctl: Fix the baud_table check in encode_baud_rate

On Wed, 17 Oct 2007, Alan Cox wrote:

> >  The tty_termios_encode_baud_rate() function as defined by tty_ioctl.c has 
> > a problem with the baud_table within.  The comparison operators are 
> > reversed and as a result this table's entries never match and BOTHER is 
> > always used.
> 
> Oops. I thought I'd fixed that one. Bit bothersome its been in -mm that
> long before anyone noticed. 

 -ENOTENOUGHUSERS?

> >  Additionally this function's prototype is not exported unlike the 
> > function itself.
> 
> That bit seems out of date and a prototype was added later in -mm

 Given the function has survived for quite a while without a prototype 
exported (how to use it otherwise? -- I guess set_sgttyb() does not count 
as hardly anybody should be calling it), I suppose it is no surprise it 
was not adequately tested. ;-)

  Maciej
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