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bus: mhi: ep: Check if the channel is supported by the controller

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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>
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>
This commit is contained in:
Manivannan Sadhasivam 2022-12-28 21:47:00 +05:30
parent 47a1dcaea0
commit 6de4941c02
1 changed files with 7 additions and 0 deletions
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7
drivers/bus/mhi/ep/main.c
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@ -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;