Re: CH341 driver and the 5.4 kernel

[Greg KH <gregkh@linuxfoundation.org>]

On Wed, Jul 07, 2021 at 03:33:52AM -0400, Jeffrey Walton wrote:
> Hi Everyone,
> 
> I'm trying to track down the cause of some garbage in a response when
> using an ELM327 (https://www.elmelectronics.com/ic/elm327/) with a
> CH341 serial controller.
> 
> I see there's been a fair amount of activity with the CH341
> (https://github.com/torvalds/linux/commits/master/drivers/usb/serial/ch341.c),
> but I can't tell if its been backported to the 5.4 kernel.
> Specifically, the 5.4.0-77 kernel supplied with Ubuntu 18.04 and Mint
> 20.1.

Who knows what has been backported to random vendor kernels like this :)

Look at the source and see!

> Does anyone know if the fixes and improvements for the CH341 have made
> their way into the 5.4 kernel?

What specific commit are you looking for?

And if you want to use this device, why not use a much more modern
kernel release?  5.4 is quite old for new hardware to be using, does
5.13 work properly for you?

thanks,

greg k-h