Re: [PATCH] iio: buffer: Fix wait_queue not being removed

[Jonathan Cameron <jic23@kernel.org>]

On Sat, 21 Feb 2026 15:27:42 -0600
David Lechner <dlechner@baylibre.com> wrote:

> On 2/16/26 7:24 AM, Nuno Sá via B4 Relay wrote:
> > From: Nuno Sá <nuno.sa@analog.com>
> > 
> > In the edge case where the IIO device is unregistered while we're
> > buffering, we were directly returning an error without removing the wait
> > queue. Instead, set 'ret' and break out of the loop.
> > 
> > Fixes: 9eeee3b0bf19 ("iio: Add output buffer support")
> > Signed-off-by: Nuno Sá <nuno.sa@analog.com>
> > ---  
> Reviewed-by: David Lechner <dlechner@baylibre.com>
> 
This brings the code inline with the near identical
flow in the read path.

It's been a while since I last looked at the locking / tear
down (what that ->info check is all about).  I'll add actually
documenting all the corner cases to the todo list as IIRC
there are some non obvious ordering constraints.  IIRC,
in the buffer paths, it is fairly straight forward
as it's just an optimization to avoid queuing or draining
data when the device is going down - nothing about the buffers
themselves involves interacting directly with the hardware.

Applied to the fixes-togreg branch of iio.git and marked
for stable.

Thanks,

Jonathan