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[Launchpad Bug Tracker <1375452@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.16.0-20.27

---------------
linux (3.16.0-20.27) utopic; urgency=low

  [ Tim Gardner ]

  * [Config] CONFIG_CXL=m
  * Release Tracking Bug
    - LP: #1376354

  [ Andi Kleen ]

  * SAUCE: perf tools: Fix perf record as non root with kptr_restrict == 1
    - LP: #1375441

  [ Chris J Arges ]

  * SAUCE: Revert "sd: don't use scsi_setup_blk_pc_cmnd for flush requests"
    - LP: #1375452

  [ Ian Munsie ]

  * SAUCE: (no-up) powerpc/cell: Move spu_handle_mm_fault() out of cell platform
  * SAUCE: (no-up) powerpc/cell: Move data segment faulting code out of cell platform
  * SAUCE: (no-up) powerpc/msi: Improve IRQ bitmap allocator
  * SAUCE: (no-up) powerpc/mm: Export mmu_kernel_ssize and mmu_linear_psize
  * SAUCE: (no-up) powerpc/powernv: Split out set MSI IRQ chip code
  * SAUCE: (no-up) cxl: Add new header for call backs and structs
  * SAUCE: (no-up) powerpc/powerpc: Add new PCIe functions for allocating cxl interrupts
  * SAUCE: (no-up) powerpc/mm: Add new hash_page_mm()
  * SAUCE: (no-up) powerpc/opal: Add PHB to cxl mode call
  * SAUCE: (no-up) powerpc/mm: Add hooks for cxl
  * SAUCE: (no-up) cxl: Add base builtin support
  * SAUCE: (no-up) cxl: Driver code for powernv PCIe based cards for userspace access
  * SAUCE: (no-up) cxl: Userspace header file.
  * SAUCE: (no-up) cxl: Add driver to Kbuild and Makefiles
  * SAUCE: (no-up) cxl: Add documentation for userspace APIs
 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>   Tue, 30 Sep 2014 13:05:27 -0600

** Changed in: linux (Ubuntu Utopic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1375452

Title:
  linux 3.16.0-18.25 fails to boot on POWER8 VM with ibm-vscsi

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Utopic:
  Fix Released

Bug description:
  When I try to boot 3.16.0-18.25 on a POWER8 VM, I get the following in
  a hard loop on the console:

  [72319.154290] sd 0:0:0:0: Can't map DMA_BIDIRECTIONAL to read/write
  [72319.154413] sd 0:0:0:0: couldn't convert cmd to srp_cmd

  Reproducible with subsequent reboots, it's not a one-off issue.
  Rebooting into 3.16.0-17.23 works fine.

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