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

[Tim Gardner]

On 11/9/22 6:19 AM, Luke Nowakowski-Krijger 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(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
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Tim Gardner
Canonical, Inc