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[ Upstream commit 7cf2cba43f15c74bac46dc5f0326805d25ef514d ] Most of the ACS quirks have a similar pattern of: acs_flags &= ~( <controls provided by this device> ); return acs_flags ? 0 : 1; Pull this out into a helper function to simplify the quirks slightly. The helper function is also a convenient place for comments about what the list of ACS controls means. No functional change intended. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>