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| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2022-12-28 21:47:00 +0530 |
|---|---|---|
| committer | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2023-01-27 12:31:41 +0530 |
| commit | 6de4941c0215ac1ea54918ace695a28f4a5ca89b (patch) | |
| tree | 85f9ee26e46619532b42d361e749206ac87ee37b /drivers/bus | |
| parent | 47a1dcaea07367c84238e71c08244ae3ed48c1cc (diff) | |
| download | linux-6de4941c0215ac1ea54918ace695a28f4a5ca89b.tar.gz | |
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 <manivannan.sadhasivam@linaro.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://lore.kernel.org/r/20221228161704.255268-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/mhi/ep/main.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/bus/mhi/ep/main.c b/drivers/bus/mhi/ep/main.c index 55209d42a9955..8b065a3cc848f 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; |