From: Jia-Ju Bai <baijiaju1...@163.com> Date: Wed, 31 May 2017 10:34:49 +0800
> The driver may sleep under a spin lock in some function call paths. > The 1st function call path is: > enic_reset (acquire the lock by spin_lock) > enic_stop > enic_synchronize_irqs > synchronize_irq --> may sleep > The 2nd function call path is: > enic_reset (acquire the lock by spin_lock) > enic_dev_soft_reset > enic_dev_wait > schedule_timeout_uninterruptible --> may sleep > The 3rd function call path is: > enic_reset (acquire the lock by spin_lock) > enic_open > enic_request_intr > enic_set_rx_cpu_rmap > enic_free_rx_cpu_rmap > free_irq_cpu_rmap --> may sleep > > To fix it, the "spin_lock" and "spin_unlock" are removed in enic_reset. > > Signed-off-by: Jia-Ju Bai <baijiaju1...@163.com> That's not necessarily safe at all, the lock is probably needed for synchronization.
