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(parent: 4fdaf8c) | patch
vchiq_arm: Avoid use of mutex in add_completion
authorPhil Elwell <phil@raspberrypi.org>
Mon, 20 Jun 2016 12:51:44 +0000 (13:51 +0100)
committerJaechul Lee <jcsing.lee@samsung.com>
Fri, 18 Aug 2017 01:04:51 +0000 (10:04 +0900)
commite3557d8e3aec05b9c7794d1f0b28a36855c4f09c
tree1371ac1329ad3468d6393cfe6572a672b5fa728ftree | snapshot
parent4fdaf8c23f8d3dcd6d6133714401189db39f4bb2commit | diff
vchiq_arm: Avoid use of mutex in add_completion

Claiming the completion_mutex within add_completion did prevent some
messages appearing twice, but provokes a deadlock caused by vcsm using
vchiq within a page fault handler.

Revert the use of completion_mutex, and instead fix the original
problem using more memory barriers.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c diff | blob | history
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c diff | blob | history
Domain: System / Kernel; Licenses: GPL-2.0;