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[ Upstream commit5d09c63f11] Dan reports that cxl_decoder_commit() potentially leaks a hold of cxl_dpa_rwsem. The potential error case is a "should not" happen scenario, turn it into a "can not" happen scenario by adding the error check to cxl_port_setup_targets() where other setting validation occurs. Reported-by: Dan Carpenter <dan.carpenter@linaro.org> Closes: http://lore.kernel.org/r/63295673-5d63-4919-b851-3b06d48734c0@moroto.mountain Reviewed-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Fixes:176baefb2e("cxl/hdm: Commit decoder state to hardware") Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>