i40e: hold the RTNL lock while changing interrupt schemes
When we suspend and resume, we need to clear and re-enable the interrupt scheme. This was previously not done while holding the RTNL lock, which could be problematic, because we are actually destroying and re-creating queues. Hold the RTNL lock for the entire sequence of preparing for reset, and when resuming. This additionally protects the flags related to interrupt scheme under RTNL lock so that their modification is properly threaded. This is part of a larger effort to remove the need for cmpxchg64 in i40e_set_priv_flags(). Signed-off-by:Jacob Keller <jacob.e.keller@intel.com> Tested-by:
Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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