linux-kernel - Re: [PATCH] atmel_serial: Split the interrupt handler

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Message-ID: <3efb10970712190518x384f06e7q39f8fd2a53e50d60@mail.gmail.com>
Date:	Wed, 19 Dec 2007 14:18:18 +0100
From:	"Remy Bohmer" <linux@...mer.net>
To:	"Haavard Skinnemoen" <hskinnemoen@...el.com>
Cc:	"Andrew Victor" <linux@...im.org.za>,
	"ARM Linux Mailing List" <linux-arm-kernel@...ts.arm.linux.org.uk>,
	"Russell King - ARM Linux" <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] atmel_serial: Split the interrupt handler

Hello Haavard,

> Hrm. We probably need to lock while updating icount. That's a problem
> since we do that from the tx interrupt handler...and I don't suppose we
> want to move most of the atmel_tx_chars() code into the tasklet too...?

I do not see a reason why not moving transmit to a tasklet. It is only
time critical to read in time. If the transmit is postponed for a
while, it will only slow down transmission, while not reading in time
results in lost data.

Kind Regards,

Remy
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