** Summary changed:

- change udev rules for rpmb partitions
+ Fix udev rules to consider mmc rpmb partitions

** Description changed:

- As per JESD 4.5 spec for eMMC devices,
- There is a new partitions as part of eMMC storage devices it self. (Further 
details please refer eMMC spec) 
+ As per JEDEC 4.5 spec for eMMC devices,
+ There is a new partitions as part of eMMC storage devices it self. (Further 
details please refer eMMC spec)
  
  *In Linux Kernel@ 3.10.33, mmc driver has created a new partitions with
  "mmcblkXrpmb" if device expresses it support of RPMB.
  
  Issues observed:
  
  issue 1:
  RPMB (Replay Protected Memory Block), A signed access to a Replay Protected 
Memory Block is provided. This function provides means for the system to store 
data to the specific memory area in an authenticated and replay protected 
manner.
  In that case, any read/write access to this partition device will report 
errors.
  
  issue 2:
- The by-path, line is wrongly mapping to platform-sdhci-tegra.1  -> 
mmcblk2rpmb were as 
+ The by-path, line is wrongly mapping to platform-sdhci-tegra.1  -> 
mmcblk2rpmb were as
  it should be platform-sdhci-tegra.1  -> mmcblk2
- 
  
  ls -l /dev/disk/by-path/
  total 0
  lrwxrwxrwx 1 root root 17 Jan  3  2000 platform-sdhci-tegra.1 -> 
../../mmcblk2rpmb
  lrwxrwxrwx 1 root root 15 Jan  3  2000 platform-sdhci-tegra.1-part1 -> 
../../mmcblk2p1
  lrwxrwxrwx 1 root root 13 Jan  3  2000 platform-sdhci-tegra.2 -> ../../mmcblk1
  lrwxrwxrwx 1 root root 15 Jan  3  2000 platform-sdhci-tegra.2-part1 -> 
../../mmcblk1p1
  lrwxrwxrwx 1 root root 17 Jan  3  2000 platform-sdhci-tegra.3 -> 
../../mmcblk0rpmb
  lrwxrwxrwx 1 root root 15 Jan  3  2000 platform-sdhci-tegra.3-part1 -> 
../../mmcblk0p1
  lrwxrwxrwx 1 root root 15 Jan  3  2000 platform-sdhci-tegra.3-part2 -> 
../../mmcblk0p2
- 
  
  We have locally resolved in our platform in this file 60-persistent-
  storage.rules
  
  For issue 1: (with this rule)
  # skip block read for partitions of type rpmb
  KERNEL=="mmcblk[0-9]rpmb", SUBSYSTEM=="block", GOTO="persistent_storage_end"
  
  For issue 2:
  ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="?*", KERNEL=="mmcblk[0-9]rpmb", 
SYMLINK+="disk/by-path/$env{ID_PATH}-rpmb"
  ENV{DEVTYPE}=="disk", ENV{ID_PATH}=="?*", KERNEL!="mmcblk[0-9]rpmb", 
SYMLINK+="disk/by-path/$env{ID_PATH}"
  
- 
  Please consider this issues fix in next udev release .

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1333140

Title:
  Fix udev rules to consider mmc rpmb partitions

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/udev/+bug/1333140/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to