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Some controller lockup on a ata_read_log_page. Add new ata port flag ATA_FLAG_NO_LOG_PAGE which can used to blacklist a controller. If this flag is set, any attempt to read a log page returns an error without actually issuing the command. Signed-off-by: Andreas Werner <andreas.werner@men.de> Signed-off-by: Tejun Heo <tj@kernel.org>