kernel-packages team mailing list archive

[Dmitry Dagunts <ddagunts@xxxxxxxxxxxxx>]

Public bug reported:

I posted more info here: https://github.com/ddagunts/UTCWM_N7_patch

Long story short, newer Nexus 7 "flo" models, made in/after late 2014 have a different revision to their eMMC controller/hardware/something.  This causes Ubuntu Touch to fail to boot (or enter recovery).  A kernel with the following patch is needed:
```
mmc: add 5.0 emmc support

bug: 17968808 Kernel change for new eMMC v5.0 parts for FLO/DEB

Change-Id: Ia18152457fe3ff70401b199c267fa37374b9d544
Signed-off-by: hsuan-chih_chen <hsuan-chih_chen@xxxxxxxx>
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index dc4b125..ea1eca7 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -293,7 +293,7 @@
    }

    card->ext_csd.rev = ext_csd[EXT_CSD_REV];
-   if (card->ext_csd.rev > 6) {
+   if (card->ext_csd.rev > 7) {
        pr_err("%s: unrecognised EXT_CSD revision %d\n",
            mmc_hostname(card->host), card->ext_csd.rev);
        err = -EINVAL;
```

I answered a question about this here:
http://askubuntu.com/questions/674179/ubuntu-device-flash-fails-on-
nexus-7-2013-android-5-0-2-cant-copy-image-to

** Affects: linux-flo (Ubuntu)
     Importance: Undecided
         Status: New

-- 
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Packages, which is subscribed to linux-flo in Ubuntu.
https://bugs.launchpad.net/bugs/1497472

Title:
  Kernel fails to find devices to mount

Status in linux-flo package in Ubuntu:
  New

Bug description:
  I posted more info here: https://github.com/ddagunts/UTCWM_N7_patch

  Long story short, newer Nexus 7 "flo" models, made in/after late 2014 have a different revision to their eMMC controller/hardware/something.  This causes Ubuntu Touch to fail to boot (or enter recovery).  A kernel with the following patch is needed:
  ```
  mmc: add 5.0 emmc support

  bug: 17968808 Kernel change for new eMMC v5.0 parts for FLO/DEB

  Change-Id: Ia18152457fe3ff70401b199c267fa37374b9d544
  Signed-off-by: hsuan-chih_chen <hsuan-chih_chen@xxxxxxxx>
  diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
  index dc4b125..ea1eca7 100644
  --- a/drivers/mmc/core/mmc.c
  +++ b/drivers/mmc/core/mmc.c
  @@ -293,7 +293,7 @@
      }

      card->ext_csd.rev = ext_csd[EXT_CSD_REV];
  -   if (card->ext_csd.rev > 6) {
  +   if (card->ext_csd.rev > 7) {
          pr_err("%s: unrecognised EXT_CSD revision %d\n",
              mmc_hostname(card->host), card->ext_csd.rev);
          err = -EINVAL;
  ```

  I answered a question about this here:
  http://askubuntu.com/questions/674179/ubuntu-device-flash-fails-on-
  nexus-7-2013-android-5-0-2-cant-copy-image-to

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