tree a37550c760bf26300ed6e6277510b96da8c753c8
parent f272b9e777de92f96b9298889bf145e40c5db2e3
author Sami Tolvanen <samitolvanen@google.com> 1430130269 +0100
committer Sami Tolvanen <samitolvanen@google.com> 1432800542 +0100

Handle BLKDISCARD failures

In the block updater, if BLKDISCARD fails, the error is silently
ignored and some of the blocks may not be erased. This means the
target partition will have inconsistent contents.

If the ioctl fails, return an error and abort the update.

Bug: 20614277
Change-Id: I33867ba9337c514de8ffae59f28584b285324067