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@xxxxxxxxxx>
---
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
