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

Message ID 1610138396-25811-3-git-send-email-bbhatt@codeaurora.org
State New
Headers show
Series [RESEND,v4,1/8] bus: mhi: core: Allow sending the STOP channel command | expand

Commit Message

Bhaumik Bhatt Jan. 8, 2021, 8:39 p.m. UTC 
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(-)
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Patch

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);