On 09/06/2012 08:58 PM, Shawn Guo wrote: > On Thu, Sep 06, 2012 at 04:35:25PM -0600, Stephen Warren wrote: >> I believe this patch is causing issues initializing PCI-Express on Tegra. >> >> In next-20120906, I cold-booted 10 times. 3 times, PCIe initialized OK, >> and 7 times, the driver timed out in arch/arm/mach-tegra/pcie.c function >> tegra_pcie_check_link(). With this patch reverted, another 10 cold boot >> attempts all succeeded just fine. Similarly, the regression appeared in >> next-20120905, and I isolated it to arch/arm/kernel/, and this is the >> only patch in that directory between next-20120904 and next-20120905. >> >> Do you have any idea what the problem might be? >> >> Looking at the timestamps in dmesg in the failing case, the driver is >> waiting the expected (per pcie.c driver code) 1.2 seconds before giving >> up on the port, although I suppose if the kernel's idea of real-time is >> off, then the dmesg log timestamps might be off too. > > Just for identifying the problem, can you test the following change to > see if it fixes the failure. Yes, that does solve the problem (well, with s/late_init/late_initcall/). As you imply, that change wouldn't help if cpu-tegra.c was built as a module. So, is this something you can work around in your patch? Thanks for the quick response. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
