diff options
| author | Dave Gerlach <d-gerlach@ti.com> | 2019-12-11 22:03:14 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-05 14:43:41 +0000 |
| commit | 17d87b3e0b2e26b1ce13c70c10e998cbdcf2bb59 (patch) | |
| tree | db22af67c05212f8c2a1463eedd5aa2cfca2ddcb /tools/lib/traceevent | |
| parent | 8d22af64f8283e732d6f858da90fcd8cee90361d (diff) | |
soc: ti: wkup_m3_ipc: Fix race condition with rproc_boot
[ Upstream commit 03729cfa0d543bc996bf959e762ec999afc8f3d2 ]
Any user of wkup_m3_ipc calls wkup_m3_ipc_get to get a handle and this
checks the value of the static variable m3_ipc_state to see if the
wkup_m3 is ready. Currently this is populated during probe before
rproc_boot has been called, meaning there is a window of time that
wkup_m3_ipc_get can return a valid handle but the wkup_m3 itself is not
ready, leading to invalid IPC calls to the wkup_m3 and system
instability.
To avoid this, move the population of the m3_ipc_state variable until
after rproc_boot has succeeded to guarantee a valid and usable handle
is always returned.
Reported-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/lib/traceevent')
0 files changed, 0 insertions, 0 deletions