From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: mhi@lists.linux.dev
Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
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 [thread overview]
Message-ID: <20221228161704.255268-3-manivannan.sadhasivam@linaro.org> (raw)
In-Reply-To: <20221228161704.255268-1-manivannan.sadhasivam@linaro.org>
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
next prev parent reply other threads:[~2022-12-28 16:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-28 16:16 [PATCH 0/6] MHI EP fixes and improvements Manivannan Sadhasivam
2022-12-28 16:16 ` [PATCH 1/6] bus: mhi: ep: Power up/down MHI stack during MHI RESET Manivannan Sadhasivam
2023-01-05 4:09 ` Jeffrey Hugo
2022-12-28 16:17 ` Manivannan Sadhasivam [this message]
2023-01-05 4:11 ` [PATCH 2/6] bus: mhi: ep: Check if the channel is supported by the controller Jeffrey Hugo
2022-12-28 16:17 ` [PATCH 3/6] bus: mhi: ep: Only send -ENOTCONN status if client driver is available Manivannan Sadhasivam
2023-01-05 4:12 ` Jeffrey Hugo
2022-12-28 16:17 ` [PATCH 4/6] bus: mhi: ep: Fix the debug message for MHI_PKT_TYPE_RESET_CHAN_CMD cmd Manivannan Sadhasivam
2023-01-05 15:54 ` Jeffrey Hugo
2022-12-28 16:17 ` [PATCH 5/6] bus: mhi: ep: Move chan->lock to the start of processing queued ch ring Manivannan Sadhasivam
2023-01-05 15:56 ` Jeffrey Hugo
2022-12-28 16:17 ` [PATCH 6/6] bus: mhi: ep: Save channel state locally during suspend and resume Manivannan Sadhasivam
2023-01-05 15:57 ` Jeffrey Hugo
2023-01-23 7:23 ` [PATCH 0/6] MHI EP fixes and improvements Manivannan Sadhasivam
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