[RESEND PATCH v4 2/8] bus: mhi: core: Allow channel to be disabled from stopped state

Bhaumik Bhatt
2021-01-08T20:42:01Z

If a channel was explicitly stopped but not reset, allow it to
move to a disabled state so that the channel context can be
cleaned up after a driver remove is issued. Since the channel
remained in stopped state, its context on the device is not
cleared. Allow this move if a client driver module is unloaded
or a device crash occurs.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
---
drivers/bus/mhi/core/init.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index aa575d3..03c5786 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -1293,7 +1293,8 @@ static int mhi_driver_remove(struct device *dev)

mutex_lock(&mhi_chan->mutex);

- if (ch_state[dir] == MHI_CH_STATE_ENABLED &&
+ if ((ch_state[dir] == MHI_CH_STATE_ENABLED ||
+ ch_state[dir] == MHI_CH_STATE_STOP) &&
!mhi_chan->offload_ch)
mhi_deinit_chan_ctxt(mhi_cntrl, mhi_chan);