[PATCH v3 2/7] bus: mhi: core: Allow channel to be disabled from stopped state

From: Bhaumik Bhatt
Date: Wed Dec 02 2020 - 18:42:01 EST


If a channel was explicitly stopped but not reset, allow it to
move to a disabled state so the channel context can be cleaned
up. As the channel remained in a stopped state, its context was
not reset and cleared, which needs to be done if a client driver
module is unloaded or a device crash occurs.

Signed-off-by: Bhaumik Bhatt <bbhatt@xxxxxxxxxxxxxx>
---
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 f0697f4..e7b9a90 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -1288,7 +1288,8 @@ 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);

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