Manivannan Sadhasivam 86e9eb69c0 bus: mhi: ep: Change state_lock to mutex ... [ Upstream commit 1ddc761829 ] state_lock, the spinlock type is meant to protect race against concurrent MHI state transitions. In mhi_ep_set_m0_state(), while the state_lock is being held, the channels are resumed in mhi_ep_resume_channels() if the previous state was M3. This causes sleeping in atomic bug, since mhi_ep_resume_channels() use mutex internally. Since the state_lock is supposed to be held throughout the state change, it is not ideal to drop the lock before calling mhi_ep_resume_channels(). So to fix this issue, let's change the type of state_lock to mutex. This would also allow holding the lock throughout all state transitions thereby avoiding any potential race. Cc: <stable@vger.kernel.org> # 5.19 Fixes: e4b7b5f0f3 ("bus: mhi: ep: Add support for suspending and resuming channels") Reported-by: Dan Carpenter <error27@gmail.com> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-03-17 08:50:19 +01:00
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ep	bus: mhi: ep: Change state_lock to mutex	2023-03-17 08:50:19 +01:00
host	bus: mhi: host: Fix race between channel preparation and M0 event	2023-01-07 11:11:54 +01:00
Kconfig	bus: mhi: ep: Add support for registering MHI endpoint controllers	2022-04-26 13:17:40 +02:00
Makefile	bus: mhi: ep: Add support for registering MHI endpoint controllers	2022-04-26 13:17:40 +02:00
common.h	bus: mhi: ep: Add support for sending events to the host	2022-04-26 13:17:41 +02:00