On Mon, Jan 28, 2013 at 8:11 AM, Kent Yoder <k...@linux.vnet.ibm.com> wrote: > On Fri, Jan 25, 2013 at 01:25:38PM -0700, Jason Gunthorpe wrote: >> On Tue, Jan 22, 2013 at 05:29:23PM -0600, Kent Yoder wrote: >> > Hi Jason, >> > >> > On Wed, Nov 21, 2012 at 3:15 PM, Jason Gunthorpe >> > <jguntho...@obsidianresearch.com> wrote: >> > > We've been testing an alternative TPM for our embedded products and >> > > found random kernel boot failures due to time outs after the continue >> > > self test command. >> > > >> > > This was happening randomly, and has been *very* hard to track down, but >> > > it >> > > looks like with this chip there is some kind of race with the >> > > tpm_tis_status() >> > > check of TPM_STS_COMMAND_READY. If things get there 'too fast' then >> > > it sees the chip is ready, or tpm_tis_ready() works. Otherwise it takes >> > > somewhere over 400ms before the chip will return TPM_STS_COMMAND_READY. >> > > >> > > Adding some delay after tpm_continue_selftest() makes things reliably >> > > hit the failure path, otherwise it is a crapshot. >> > >> > I've staged this patch here, please test: >> > >> > https://github.com/shpedoikal/linux.git tpmdd-01-22-13 >> >> Thanks Kent, I will try to test your branch next week, if I am able. >> >> Can you also grab >> >> https://github.com/jgunthorpe/linux/commit/98b2a198b43b41b0535200bf475160786398f114 > > Thanks, I missed this, I'll start testing it.
Ok, after yet another round of fixes to the stm i2c driver, I have a staging tree. I'll submit this as-is next week unless something super ground-breaking comes up. https://github.com/shpedoikal/linux.git tpmdd-01-31-13 Thanks, Kent >> And did you have any comments on: >> >> https://github.com/jgunthorpe/linux/commit/9981e3e622bf702394982117134bed731ffd6f7e > > This one is a bit out of date atm, for instance the __dev* stuff is > going away. The thing that most makes me hesitant though is the config > if (X86 || OF). A hardware platform or a firmware type.. What platform > should this actually target? > > Kent > >> Both were posted to the list a bit ago. >> >> Regards, >> -- >> Jason Gunthorpe <jguntho...@obsidianresearch.com> (780)4406067x832 >> Chief Technology Officer, Obsidian Research Corp Edmonton, Canada >> >> ------------------------------------------------------------------------------ >> Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, >> MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current >> with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft >> MVPs and experts. ON SALE this month only -- learn more at: >> http://p.sf.net/sfu/learnnow-d2d >> _______________________________________________ >> tpmdd-devel mailing list >> tpmdd-de...@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/tpmdd-devel >> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
