[bug report] wifi: ath12k: flush all packets before suspend

[Dan Carpenter]

On Wed, May 08, 2024 at 09:51:33AM -0700, Jeff Johnson wrote:
> On 5/8/2024 5:29 AM, Dan Carpenter wrote:
> > Hello Baochen Qiang,
> > 
> > Commit 692921ead832 ("wifi: ath12k: flush all packets before
> > suspend") from Apr 22, 2024 (linux-next), leads to the following
> > Smatch static checker warning:
> > 
> > 	drivers/net/wireless/ath/ath12k/core.c:58 ath12k_core_suspend()
> > 	warn: sleeping in atomic context
> 
> Hi Dan,
> I'm not seeing this as part of my standard make W=1 C=1
> 
> What do I need to do in order to see this?
> build_kernel_data.sh ??
>

Yeah.  This is a smatch warning that requires build_kernel_data.sh
(probably you have to build several times which takes forever).  The
might_sleep() is in synchronize_net().

It's better to do run time testing.  If you run with
CONFIG_DEBUG_ATOMIC_SLEEP=y
then it will trigger a stack trace.

regards,
dan carpenter