Björn Ardö e75b5ea2d6 mailbox: forward the hrtimer if not queued and under a lock ... [ Upstream commit bca1a10046 ] This reverts commit c7dacf5b0f, "mailbox: avoid timer start from callback" The previous commit was reverted since it lead to a race that caused the hrtimer to not be started at all. The check for hrtimer_active() in msg_submit() will return true if the callback function txdone_hrtimer() is currently running. This function could return HRTIMER_NORESTART and then the timer will not be restarted, and also msg_submit() will not start the timer. This will lead to a message actually being submitted but no timer will start to check for its compleation. The original fix that added checking hrtimer_active() was added to avoid a warning with hrtimer_forward. Looking in the kernel another solution to avoid this warning is to check hrtimer_is_queued() before calling hrtimer_forward_now() instead. This however requires a lock so the timer is not started by msg_submit() inbetween this check and the hrtimer_forward() call. Fixes: c7dacf5b0f ("mailbox: avoid timer start from callback") Signed-off-by: Björn Ardö <bjorn.ardo@axis.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-06-14 16:53:51 +02:00
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arm_mhu.c
bcm-flexrm-mailbox.c
bcm-pdc-mailbox.c
bcm2835-mailbox.c
hi6220-mailbox.c
Kconfig
mailbox-altera.c
mailbox-sti.c
mailbox-test.c	mailbox: mailbox-test: fix null pointer if no mmio	2019-12-05 15:38:31 +01:00
mailbox-xgene-slimpro.c
mailbox.c	mailbox: forward the hrtimer if not queued and under a lock	2022-06-14 16:53:51 +02:00
mailbox.h
Makefile
omap-mailbox.c
pcc.c	mailbox: reset txdone_method TXDONE_BY_POLL if client knows_txdone	2019-11-12 19:18:23 +01:00
pl320-ipc.c
platform_mhu.c
qcom-apcs-ipc-mailbox.c
rockchip-mailbox.c
tegra-hsp.c
ti-msgmgr.c