From 6de4941c0215ac1ea54918ace695a28f4a5ca89b Mon Sep 17 00:00:00 2001 From: Manivannan Sadhasivam Date: Wed, 28 Dec 2022 21:47:00 +0530 Subject: bus: mhi: ep: Check if the channel is supported by the controller Before processing the command ring for the channel, check if the channel is supported by the controller or not. Signed-off-by: Manivannan Sadhasivam Reviewed-by: Jeffrey Hugo Link: https://lore.kernel.org/r/20221228161704.255268-3-manivannan.sadhasivam@linaro.org Signed-off-by: Manivannan Sadhasivam --- drivers/bus/mhi/ep/main.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers') 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; -- cgit