On Tue, Dec 01, 2015 at 02:04:10PM -0500, Tejun Heo wrote: > On Tue, Dec 01, 2015 at 11:17:15AM -0500, Tejun Heo wrote: > > So, I suppose this is a fallout from 9faa643855df ("libata: use > > READ_LOG_DMA_EXT"). The description just says "we should try use it" > > but is there any benefit from using NCQ variant of read log page? I > > mean, it's used during config and error handling, so it's not like > > queueing is gonna help anything. It ends up issuing NCQ commands on > > controllers which don't support NCQ and causes failures on devices > > which lie about supporting the feature. > > Hmmm... so, the controller locks up on READ_LOG_EXT issued as pio? > That's just weird. I suppose you can blacklist the controller so that > any attempt to read the log page fails without actually issuing the > command. > > Thanks. > > -- > tejun Hi, yes since i am using 3.14 where the READ_LOG_DMA_EXT is not it, it seems that the controller locks up even on READ_LOG_EXT as PIO. I have checked the current ERRATA sheet of the CPU but there are no issues regarding this problem. Test on a Freescale T4240 show the same behaviour as on P1013/P1022. It seems that some FSL Cpus are affected. I have asked my FAE at Freescale if he has some information about that kind of issue. Blacklisting the controller would be a solution yes, but I just wanna wait the answer from the FAE to be sure we really have a problem. What kind of identifier can I use for blacklisting? The driver name from the host driver? (fsl-sata) I did not find any register in the sata controller to read out an ID. Regards Andy -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html