Re: [PATCH] tty: serial: fixed uart irq maybe cause irq storm

[Ilpo Järvinen]

On Mon, 1 Apr 2024, Feng Chunguo wrote:

> Hi Greg KH，
> 
> Sent this path again.
> 
>  the irq should not be turned off here, what happens if some data comes in while this
> function is running?  Will it be lost?
> --> lost，not receive other irq.
> 
>  When the uart was switching the baud rate from one to other,  this issue can be
> reproduced.


>> This feels wrong,
>> the irq should not be turned off here, what happens if some data comes in while this
>> function is running? Will it be lost? thanks, greg k-h

Changing rate always risks losing what's currently on wire due to timing 
related corruption, I don't think there there's a way around that IRQ 
being enabled or not.


-- 
 i.