tree 4e7aaf8e93f44cd98874741b986995a9be2791f5
parent 90355b6ee4bbc26b9a826c4371390e05e2fec6a5
author Amir Samuelov <amirs@codeaurora.org> 1499250209 +0300
committer Gerrit - the friendly Code Review server <code-review@localhost> 1502638607 -0700

spcom: avoid race condition when handling commands

The spcom allows only one owner per channel, so only one app can open()
a channel char device at a time.
However, the channel owner process might share the channel file
descriptor (fd) with other threads, that might write() concurrently
a command to spcom, that can cause a race.
Add a mutex to "serialize" handling of the commands.

Change-Id: Ief9c6c48a862444dfff66d14d2317568cd6e81e6
Signed-off-by: Amir Samuelov <amirs@codeaurora.org>