linux-kernel - Serial driver doesn't handle FIFO error ?

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Message-ID: <1ace22690702131742u18aec57egbfe465d179014b08@mail.gmail.com>
Date:	Wed, 14 Feb 2007 12:42:01 +1100
From:	"Alex Shinkin" <alexshinkin@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Serial driver doesn't handle FIFO error ?

Hi all .

I am working on serial communication protocol for an x86 industrial platform ,
namely Advantech PCM 5825 CPU board + PCM 3618 RS232/485  communication board.
Tried 2.4.33 and 2.6.18...20 kernels .

After investigating some incoming data corruption I noticed that
sometimes the status value that has been read from LSR  contains the
"FIFO error" bit set ( 0x80 ) . I did not find a code that handle this
condition , there is no even such bit mask defined in serial_reg.h .
BTW I have this bit set even if all other error bits in LSR are 0  (
frame error etc.) .
Is there any reason for not to handle the "FIFO error " bit ?
Or it is just because the situation is very rare ?

Any comments appreciated .
Thanks .
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