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Issue: Deadlock observed because ptp_lock shared between process context and Interrupt context. Below is the scenario where deadlock observed - 1) ether_adjust_freq acquired the lock 2) At the same ether_get_ptptime() called from IRQ context 3) ether_adjust_freq() got preempted and ether_get_ptptime() trying to aquire the lock again which leads to dead lock. Fix: Disable the interrupts before aquiring the lock by using IRQ-safe variant of raw spinlock. Bug 200591192 Bug 200535378 Change-Id: I6f884883bf9cf93877ddb5d0fb7b2927573a1858 Signed-off-by: Bhadram Varka <vbhadram@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2323211 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> Reviewed-by: automaticguardword <automaticguardword@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>