Re: [PATCH] Bluetooth: btqcomsmd: Fix command timeout after setting BD address

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Hi Paul,

On Mon, Jun 13, 2022 at 06:09:33PM +0200, Paul Menzel wrote:
> Am 13.06.22 um 13:07 schrieb Stephan Gerhold:
> > The Bluetooth firmware seems to become unresponsive for a while after
> 
> Please mention the device with the problematic firmware.
> 

Will add a comment in v2. It seems to affect pretty much all devices
that make use of the "btqcomsmd" driver.

> > setting the BD address. At least on recent kernel versions this often
> 
> The commit referenced in the Fixes tag is in Linux 4.9. Can you please name
> the oldest Linux kernel version you experienced the problem with.
> 

This is quite hard to say. It definitely became more apparent in the
last few months (so at least 5.17+). But since it's a timing problem
it's influenced by various side effects. For example, it is less likely
to happen the more hardware functionality you enable on a board (because
other interrupts come in and might cause the necessary delay).

I believe that the problem also exists in some form on Linux 4.9,
even though it might be harder to trigger it there.

Thanks,
Stephan



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