i.mx25 :trouble with serial flow hardware

[Wolfram Sang]

Hi,

On Wed, Sep 15, 2010 at 05:38:58PM +0200, Olivier Barthel wrote:

> I think the problem is in the function imx_transmit_buffer of file
> imx.c when this function is called by imx_start_tx called by
> uart_handle_cts_change. It consumes a character in the ring buffer
> (tail=tail+1) before testing whether the buffer is empty (tail=head?)
> or not. In the next loop, the function detects 4095 items in the
> circular buffer.
> By moving the test before reading of ring buffer, the problem is
> apparently corrected.

Sounds reasonable. Can you send a patch? It is easier to review code.

Thanks,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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