Re: [PATCH] rtase: Avoid sleeping in get_stats64()

[Alexander Lobakin]

From: Justin Lai <justinlai0215@xxxxxxxxxxx>
Date: Mon, 1 Jun 2026 14:24:47 +0800

> The .ndo_get_stats64 callback must not sleep because it can be
> called when reading /proc/net/dev.
> 
> rtase_get_stats64() calls rtase_dump_tally_counter(), which polls
> the tally counter dump bit with read_poll_timeout(). This may
> sleep while waiting for the hardware counter dump to complete.
> 
> Use read_poll_timeout_atomic() instead to avoid sleeping in the
> get_stats64() path.
> 
> Signed-off-by: Justin Lai <justinlai0215@xxxxxxxxxxx>

Looks legit.

One question: for how long can this poll for in real life scenarios? Up
to ~1 ms is okay-ish for atomic, but if longer, then you'd better to
split it into shorter polls and reschedule() time to time.

Thanks,
Olek