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From: Franck Bui-Huu <franck.bui-huu@innova-card.com>
To: linux-kernel@vger.kernel.org
Subject: [TTY] 2 points seems strange to me.
Date: Fri, 18 Feb 2005 10:30:20 +0100	[thread overview]
Message-ID: <4215B5AC.4050600@innova-card.com> (raw)
In-Reply-To: <20050217181241.A22752@flint.arm.linux.org.uk>

Hi,

Looking at TTY code, I noticed a weird test done in "opost_bock"
located in n_tty.c file. I don't understand why the following test is
done at the start of the function:
if (nr > sizeof(buf))
        nr = sizeof(buf);
Actually it limits the size of processing blocks to 4 bytes and I can't
find a reason why.

Second point, a lot of serial drivers call in their interrupt handler
"tty_flip_buffer_push" function. This function must no be called
in interrupt context. Why is it done anyway ?

Thanks for your answers.

       Franck


  parent reply	other threads:[~2005-02-18  9:32 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-02-17 17:51 Problems with dma_mmap_writecombine on mach-pxa Frank Buss
2005-02-17 18:12 ` Russell King
2005-02-17 19:14   ` Frank Buss
2005-02-17 19:58     ` Russell King
2005-02-18  9:30   ` Franck Bui-Huu [this message]
2005-02-18 14:58     ` [TTY] 2 points seems strange to me Paul Fulghum
2005-02-18 15:08       ` Paulo Marques
2005-02-18 15:15         ` Paul Fulghum
2005-02-18 15:24           ` Paulo Marques
2005-02-18 15:24           ` linux-os
2005-02-18 15:27             ` Paulo Marques
2005-02-18 16:14               ` Franck Bui-Huu
2005-02-18 15:19         ` linux-os
2005-02-18 16:29       ` Franck Bui-Huu
2005-02-18 16:41         ` Paul Fulghum
2005-02-18 18:07   ` Problems with dma_mmap_writecombine on mach-pxa Frank Buss

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