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(parent: 316840f) | 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)
committerRaspbian kernel package updater <root@raspbian.org>
Sun, 23 Jul 2017 02:20:25 +0000 (02:20 +0000)
commite0dfcfd7c0cedd75d7a63cb47adc15d9b18069fa
tree69848f714ea31ddf3af4c3d18fe8f536a1d99c00tree | snapshot
parent316840fd136cb5e451325b4ecbf328ac209624ffcommit | 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
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