> From: Xu, Quan > Sent: Thursday, March 10, 2016 10:10 PM > > pcidevs_lock doesn't require interrupts to be disabled while being acquired. > However there remains an exception in AMD IOMMU code, where the lock is > acquired with interrupt disabled. This inconsistency might lead to deadlock. > > The fix is straightforward to use spin_lock instead. Also interrupt has been > enabled when this function is invoked, so we're sure consistency around > pcidevs_lock can be guaranteed after this fix. > > Signed-off-by: Quan Xu <quan...@intel.com> > Reviewed-by: Dario Faggioli <dario.faggi...@citrix.com> > CC: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com> > CC: Dario Faggioli <dario.faggi...@citrix.com> > CC: Jan Beulich <jbeul...@suse.com> > CC: Kevin Tian <kevin.t...@intel.com>
Reviewed-by: Kevin Tian <kevin.t...@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
