On Fri, 6 Aug 2021 12:35:09 +0200 Loic Poulain wrote:
> Lockdep detected possible interrupt unsafe locking scenario:
>
> CPU0 CPU1
> ---- ----
> lock(&mhiwwan->rx_lock);
> local_irq_disable();
> lock(&mhi_cntrl->pm_lock);
> lock(&mhiwwan->rx_lock);
> <Interrupt>
> lock(&mhi_cntrl->pm_lock);
>
> *** DEADLOCK ***
>
> To prevent this we need to disable the soft-interrupts when taking
> the rx_lock.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: fa588eba632d ("net: Add Qcom WWAN control driver")
> Reported-by: Thomas Perrot <thomas.perrot@xxxxxxxxxxx>
> Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxxx>
This is for net, right? Despite it's subject annotation?
