From: Hemant Kumar <hemantk@codeaurora.org>
To: Bhaumik Bhatt <bbhatt@codeaurora.org>, manivannan.sadhasivam@linaro.org
Cc: linux-arm-msm@vger.kernel.org, jhugo@codeaurora.org,
linux-kernel@vger.kernel.org, loic.poulain@linaro.org
Subject: Re: [PATCH v5 9/9] bus: mhi: core: Do not clear channel context more than once
Date: Fri, 8 Jan 2021 20:39:33 -0800 [thread overview]
Message-ID: <d8c09f6a-52ef-e5b9-b3df-fb56ad78386b@codeaurora.org> (raw)
In-Reply-To: <1610139297-36435-10-git-send-email-bbhatt@codeaurora.org>
On 1/8/21 12:54 PM, Bhaumik Bhatt wrote:
> When clearing the channel context, calling mhi_free_coherent()
> more than once can result in kernel warnings such as "trying to
> free invalid coherent area". Prevent extra work by adding a check
> to skip calling mhi_deinit_chan_ctxt() if the client driver has
> already disabled the channels.
>
> Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> ---
> drivers/bus/mhi/core/init.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
> index 30eef19..272f350 100644
> --- a/drivers/bus/mhi/core/init.c
> +++ b/drivers/bus/mhi/core/init.c
> @@ -1314,6 +1314,7 @@ static int mhi_driver_remove(struct device *dev)
>
> if ((ch_state[dir] == MHI_CH_STATE_ENABLED ||
> ch_state[dir] == MHI_CH_STATE_STOP) &&
> + mhi_chan->ch_state != MHI_CH_STATE_DISABLED &&
> !mhi_chan->offload_ch)
> mhi_deinit_chan_ctxt(mhi_cntrl, mhi_chan);
>
>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2021-01-09 4:40 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-08 20:54 [PATCH v5 0/9] Updates to MHI channel handling Bhaumik Bhatt
2021-01-08 20:54 ` [PATCH v5 1/9] bus: mhi: core: Allow sending the STOP channel command Bhaumik Bhatt
2021-01-21 11:25 ` Manivannan Sadhasivam
2021-01-08 20:54 ` [PATCH v5 2/9] bus: mhi: core: Allow channel to be disabled from stopped state Bhaumik Bhatt
2021-01-21 11:35 ` Manivannan Sadhasivam
2021-01-08 20:54 ` [PATCH v5 3/9] bus: mhi: core: Improvements to the channel handling state machine Bhaumik Bhatt
2021-01-21 14:43 ` Manivannan Sadhasivam
2021-01-08 20:54 ` [PATCH v5 4/9] bus: mhi: core: Clear configuration from channel context during reset Bhaumik Bhatt
2021-01-21 14:47 ` Manivannan Sadhasivam
2021-01-08 20:54 ` [PATCH v5 5/9] bus: mhi: core: Add support to stop or start channel data transfers Bhaumik Bhatt
2021-01-21 14:50 ` Manivannan Sadhasivam
2021-02-04 20:25 ` Bhaumik Bhatt
2021-01-08 20:54 ` [PATCH v5 6/9] bus: mhi: core: Check channel execution environment before issuing reset Bhaumik Bhatt
2021-01-21 15:12 ` Manivannan Sadhasivam
2021-02-04 20:23 ` Bhaumik Bhatt
2021-01-08 20:54 ` [PATCH v5 7/9] bus: mhi: core: Remove __ prefix for MHI channel unprepare function Bhaumik Bhatt
2021-01-08 20:54 ` [PATCH v5 8/9] bus: mhi: Improve documentation on channel transfer setup APIs Bhaumik Bhatt
2021-01-08 20:54 ` [PATCH v5 9/9] bus: mhi: core: Do not clear channel context more than once Bhaumik Bhatt
2021-01-09 4:39 ` Hemant Kumar [this message]
2021-01-21 15:15 ` Manivannan Sadhasivam
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