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(parent: a240fa2) | 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>
Thu, 9 Mar 2017 17:51:51 +0000 (17:51 +0000)
commitf81f30a1ab0c0142fcd9c83ed09c17c1609a956b
tree1a92667147f63de9e2d4af975082e4ede852a655tree | snapshot
parenta240fa2467d14bdc9d2b91973ce39dbac9418c4ccommit | 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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