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bus: mhi: ep: Only send -ENOTCONN status if client driver is available
For the STOP and RESET commands, only send the channel disconnect status
-ENOTCONN if client driver is available. Otherwise, it will result in
null pointer dereference.
Cc: <stable@vger.kernel.org> # 5.19
Fixes: e827569062
("bus: mhi: ep: Add support for processing command rings")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://lore.kernel.org/r/20221228161704.255268-4-manivannan.sadhasivam@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
parent
6de4941c02
commit
e6cebcc275
1 changed files with 10 additions and 6 deletions
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@ -203,9 +203,11 @@ static int mhi_ep_process_cmd_ring(struct mhi_ep_ring *ring, struct mhi_ring_ele
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mhi_ep_mmio_disable_chdb(mhi_cntrl, ch_id);
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/* Send channel disconnect status to client drivers */
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result.transaction_status = -ENOTCONN;
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result.bytes_xferd = 0;
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mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
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if (mhi_chan->xfer_cb) {
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result.transaction_status = -ENOTCONN;
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result.bytes_xferd = 0;
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mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
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}
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/* Set channel state to STOP */
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mhi_chan->state = MHI_CH_STATE_STOP;
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@ -235,9 +237,11 @@ static int mhi_ep_process_cmd_ring(struct mhi_ep_ring *ring, struct mhi_ring_ele
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mhi_ep_ring_reset(mhi_cntrl, ch_ring);
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/* Send channel disconnect status to client driver */
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result.transaction_status = -ENOTCONN;
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result.bytes_xferd = 0;
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mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
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if (mhi_chan->xfer_cb) {
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result.transaction_status = -ENOTCONN;
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result.bytes_xferd = 0;
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mhi_chan->xfer_cb(mhi_chan->mhi_dev, &result);
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}
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/* Set channel state to DISABLED */
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mhi_chan->state = MHI_CH_STATE_DISABLED;
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