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Issue of the Implementation # L0100

Brief

[media] cx88: Fix unsafe locking in suspend-resume

Detailed Description

Legacy PCI suspend-resume handlers are called with interrupts enabled. But cx8800_suspend/cx8800_resume and cx8802_suspend_common/cx8802_resume_common use spin_lock/spin_unlock functions to acquire dev->slock, while the same lock is acquired in the corresponding irq-handlers: cx8800_irq and cx8802_irq. That means a deadlock is possible if an interrupt happens while suspend or resume owns the lock.

Component

linux-kernel 3.8

Accepted

https://lkml.org/lkml/2013/4/13/144
commit

Status

Fixed in kernel 3.10-rc1

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