net: wwan: mhi_wwan_ctrl: Fix possible deadlock
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@vger.kernel.org Fixes: fa588eba ("net: Add Qcom WWAN control driver") Reported-by:Thomas Perrot <thomas.perrot@bootlin.com> Signed-off-by:
Loic Poulain <loic.poulain@linaro.org> Reviewed-by:
Sergey Ryazanov <ryazanov.s.a@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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