APPLIED: [SRU][B][PATCH 0/1] Fix BUG scheduling while atomic in tg3 ethernet driver

[Luke Nowakowski-Krijger]

Applied to bionic/linux master-next

Thanks,

- Luke

On Wed, Nov 9, 2022 at 2:21 PM Luke Nowakowski-Krijger <
luke.nowakowskikrijger at canonical.com> wrote:

> BugLink: https://bugs.launchpad.net/bugs/1995870
>
> [Impact]
>
> There were BUG: scheduling while atomic: ip/1210/0x00000200 appearing
> on xenial/hwe with the tg3 ethernet driver when running on rumford
> instance.
> Probably some performace degradation as the driver was trying to sleep
> while
> holding a spinlock.
> There also was cluttering of the kernel log with stack traces.
>
> [Fix]
>
> Change usleep_range -> udelay which is safe to call from atomic
> contexts.
>
> [Test]
>
> Compile tested only. Should see this resolved in the next cycle on
> xenial/hwe rumford instance.
>
> [Where problems could occur]
>
> Not much regression potential as the correct delay call is now being
> called.
>
> Jonathan Toppins (1):
>   tg3: prevent scheduling while atomic splat
>
>  drivers/net/ethernet/broadcom/tg3.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> --
> 2.34.1
>
>
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