[U-Boot] [PATCH v4 2/2] NS16550: buffer reads

[Wolfgang Denk]

Dear Simon Glass,

In message <CAPnjgZ1VUF-HFbDX9byuV32sJfEE3SKRiT124gfgQOm0f+QSEw at mail.gmail.com> you wrote:
> 
> In a similar way, the Linux kernel has a fatal flaw. Serial data
> coming into the flip buffers under extreme interrupt load can be lost,
> or the secondary buffers can become exhausted, or user space cannot
> keep up with input under heavy load, etc., etc. This is the reality of
> the world. As each problem presents itself we direct our attention to
> it.

This is not a fatal flaw.  There is nothing in the definition of RS232
or the serialinterface that guarantees you an error free data stream -
not on that protocol level.  You are facing loss of Ethernet packages
on the network as well.

Problems start only when you make wrong assumptions.


Best regards,

Wolfgang Denk

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DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
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