On Fri, May 31, 2013 at 10:27:26AM -0500, Mark Langsdorf wrote: > The Calxeda SATA phy intermittently fails to bring up a link with Gen3 > Retrying the phy hard reset can work around the issue, but the drive > may fail again. In less than 150 out of 15000 test runs, it took more > than 10 tries for the link to be established (but never more than 35). > Triple the maximum observed retry count to provide plenty of margin for > rare events and to guarantee that the link is established. > > Also, the default 2 second time-out on a failed drive is too long in > this situation. The uboot implementation of the same driver function > uses a much shorter time-out period and never experiences a time out > issue. Shorten the Linux time-out value for this driver to 500 ms and > keep the other timing constants the same as the stock AHCI driver. This > change was also tested 15000 times on 24 drives and none of them > experienced a time out. For the third time, explain the above in the comment; otherwise, it's not going in. -- tejun -- 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
