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| author | Mayank Rana <mrana@codeaurora.org> | 2016-01-28 12:02:14 -0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-22 11:10:06 -0700 |
| commit | 5e8b41f531999e322d91cd9804691f92c38a0745 (patch) | |
| tree | 78c28798f3aaceaa807058b2407304aa7f9d6dbd /include/linux/dynamic_queue_limits.h | |
| parent | 5cd572ca8d3474613d4562e1e9cb533c8ba65842 (diff) | |
USB: f_fs: Add memory barrier before atomic operations
In few instances, it is observed that multiple adbd instances are
running on device causing condition BUG_ON(ffs->gadget) to be true.
ffs->opened and ffs->ref atomic variables are used here to make
decision for checking ffs->gadget. These atomic variable operations
requires expilict memory barrier to make sure that update to
ffs->gadget is visible to other CPUs before updated atomic variable
based value is seen. This change also adds explicit memory barriers
before reading or modified any atomic varaiables.
Change-Id: I3c846eb6bbb53663892e05d51ebac8439aac957a
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
Diffstat (limited to 'include/linux/dynamic_queue_limits.h')
0 files changed, 0 insertions, 0 deletions