Björn Ardö bb2220e067 mailbox: forward the hrtimer if not queued and under a lock ... [ Upstream commit bca1a1004615efe141fd78f360ecc48c60bc4ad5 ] 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>		2022-06-09 10:21:18 +02:00
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arm_mhu_db.c
arm_mhu.c
armada-37xx-rwtm-mailbox.c
bcm-flexrm-mailbox.c
bcm-pdc-mailbox.c
bcm2835-mailbox.c
hi3660-mailbox.c
hi6220-mailbox.c
imx-mailbox.c
Kconfig
mailbox-altera.c
mailbox-sti.c
mailbox-test.c
mailbox-xgene-slimpro.c
mailbox.c	mailbox: forward the hrtimer if not queued and under a lock	2022-06-09 10:21:18 +02:00
mailbox.h
Makefile
mtk-cmdq-mailbox.c
omap-mailbox.c
pcc.c
pl320-ipc.c
platform_mhu.c
qcom-apcs-ipc-mailbox.c
qcom-ipcc.c
rockchip-mailbox.c
sprd-mailbox.c
stm32-ipcc.c
sun6i-msgbox.c
tegra-hsp.c
ti-msgmgr.c
zynqmp-ipi-mailbox.c