Adrian, Ulf, Here are the two v4.6-rc3 kernel dmesg with mmc-debug option, both without additional patches, one working case [1], one failing case [2], the working case has patch [3] reverted. I also uploaded the acpidump [4] for Teclast X80h Baytrail-T tablet. [1]: https://bugzilla.kernel.org/show_bug.cgi?id=112571#c11 [2]: https://bugzilla.kernel.org/show_bug.cgi?id=112571#c10 [3]: patch 520bd7a8b4152aacfbd34eb7f7a447354b631039 ("mmc: core: Optimize boot time by detecting cards simultaneously") [4]: https://bugzilla.kernel.org/show_bug.cgi?id=112571#c12 On Wed, Apr 13, 2016 at 1:19 PM, Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote: > On 12/04/16 21:15, Laszlo Fiat wrote: >> Adrian, Ulf, >> >> All the mmc related patches are from [1] above. I have one extra patch >> for rfkill-gpio to get bluetooth working, and one to ignore efi-bgrt, >> but these are unrelated to mmc. Actually we can survive some time >> without the out-of-tree mmc patches, but usually we freeze within 1-2 >> hours, that is why we need them. >> >> I have compiled a v4.6-rc3 vanilla, without any additional patches and >> with CONFIG_MMC_DEBUG=y, and created dmesg: [3] > > Looks like every command to the SDIO card fails. > >> >> I will compile the same one with the offending commit 520bd7a8b415 >> reverted, so that we can compare what happens differently. >> >> For acpidump, which format do you need? > > Doesn't matter which format. > >> >> Thank you for looking into this. >> >> Best regards, >> >> Laszlo Fiat >> >> [3]: https://bugzilla.kernel.org/show_bug.cgi?id=112571#c10 >> >> On Mon, Apr 11, 2016 at 2:46 PM, Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote: >>> On 11/04/16 11:25, Ulf Hansson wrote: >>>> + Adrian >>>> >>>> On 10 April 2016 at 20:04, Laszlo Fiat <laszlo.fiat@xxxxxxxxx> wrote: >>>>> Hello, >>>>> >>>> >>>> Hi Laszlo, >>>> >>>> Thanks for your report! >>>> >>>>> I have tested this patch on top of v4.6-rc2 + our usual out-of-tree >>>>> patches from [1], and there is still no SDIO wifi showing up on >>>>> baytrail-t. dmesg is available at [2]. >>>>> >>>>> [1] https://github.com/hadess/rtl8723bs/tree/master/patches >>>>> [2] https://bugzilla.kernel.org/show_bug.cgi?id=112571#c9 >>>>> >>>> >>>> I understand this issue isn't for an upstream kernel, as you are >>>> carrying out of tree patches to enable sdhci, sdhci-acpi and sdhci-pci >>>> to work for your platform. >>>> >>>> As my bandwidth is limited, normally I can't spend time on >>>> non-upstream kernel reported regressions. Anyway, I decided to help >>>> study the kernel log in a bit more detail, but unfortunate I am not >>>> able to figure out what goes wrong. >>>> >>>> >From looking at the errors and a stack trace that gets dumped in the >>>> kernel log, my guess is that the problem lies within sdhci/sdhci-acpi. >>>> The errors seems related to your out of tree patches. >>>> >>>> Regarding commit 520bd7a8b415 ("mmc: core: Optimize boot time by >>>> detecting cards simultaneously"), even if it seems to be triggering >>>> the regression for you, I find it highly unlikely that this is the >>>> root cause. >>>> >>>> Someone that knows Baytrail/sdhci-acpi needs to help out with >>>> debugging. Perhaps Adrian or some other Intel folkz are available!? >>> >>> Need to know exactly what patches you have. Is it only the ones from [1] above? >>> >>> You could do an acpidump and also try the failing case with CONFIG_MMC_DEBUG=y. >>> >> > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
