Messages in this thread Patch in this message | | | From | Manivannan Sadhasivam <> | Subject | [PATCH 2/6] bus: mhi: ep: Check if the channel is supported by the controller | Date | Wed, 28 Dec 2022 21:47:00 +0530 |
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Before processing the command ring for the channel, check if the channel is supported by the controller or not.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> --- drivers/bus/mhi/ep/main.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/bus/mhi/ep/main.c b/drivers/bus/mhi/ep/main.c index 55209d42a995..8b065a3cc848 100644 --- a/drivers/bus/mhi/ep/main.c +++ b/drivers/bus/mhi/ep/main.c @@ -123,6 +123,13 @@ static int mhi_ep_process_cmd_ring(struct mhi_ep_ring *ring, struct mhi_ring_ele int ret; ch_id = MHI_TRE_GET_CMD_CHID(el); + + /* Check if the channel is supported by the controller */ + if ((ch_id > mhi_cntrl->max_chan) || !mhi_cntrl->mhi_chan[ch_id].name) { + dev_err(dev, "Channel (%u) not supported!\n", ch_id); + return -ENODEV; + } + mhi_chan = &mhi_cntrl->mhi_chan[ch_id]; ch_ring = &mhi_cntrl->mhi_chan[ch_id].ring; -- 2.25.1
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