tree 92f27e91f606b531f024eb547d2f6348a1d79984
parent e8291e13f6a669e9f751975ce169be291fc01e64
author Biswajit Dash <bisdash@google.com> 1548722308 -0800
committer Biswajit Dash <bisdash@google.com> 1549914712 -0800

touchscreen: fts: Fix race conditions in fts diag test interface.

fts touch driver diag core file operations were not thread safe,
allowing potentially multiple user space processes/threads to
operate on the exposed diag procfs/sysfs entry. This can cause
race while allocating/freeing/accessing global command buffer
used during diagnostics command execution. This CL fixes multiple
such races by allowing only one thread to perform file operation at
any given point of time.

Bug: 119120571
Bug: 120141034

Change-Id: Ia663988260faa948854f370c48f541fa285cc2e8
Signed-off-by: Biswajit Dash <bisdash@google.com>