From: Jeffrey Hugo <jhugo@codeaurora.org>
To: Loic Poulain <loic.poulain@linaro.org>,
manivannan.sadhasivam@linaro.org, hemantk@codeaurora.org,
kvalo@codeaurora.org
Cc: linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH] mhi: Fix double dma free
Date: Tue, 9 Feb 2021 08:55:24 -0700 [thread overview]
Message-ID: <f2612a01-2c10-9735-d4ba-46ea87c70379@codeaurora.org> (raw)
In-Reply-To: <1612885989-12288-1-git-send-email-loic.poulain@linaro.org>
On 2/9/2021 8:53 AM, Loic Poulain wrote:
> mhi_deinit_chan_ctxt functionthat takes care of unitializing channel
> resources, including unmapping coherent MHI areas, can be called
> from different path in case of controller unregistering/removal:
> - From a client driver remove callback, via mhi_unprepare_channel
> - From mhi_driver_remove that unitialize all channels
>
> mhi_driver_remove()
> |-> driver->remove()
> | |-> mhi_unprepare_channel()
> | |-> mhi_deinit_chan_ctxt()
> |...
> |-> mhi_deinit_chan_ctxt()
>
> This leads to double dma freeing...
>
> Fix that by preventing deinit for already uninitialized channel.
>
> Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
> Reported-by: Kalle Valo <kvalo@codeaurora.org>
> ---
Seems like this should have a Fixes: tag, no?
--
Jeffrey Hugo
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
next prev parent reply other threads:[~2021-02-09 15:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-09 15:53 [PATCH] mhi: Fix double dma free Loic Poulain
2021-02-09 15:55 ` Loic Poulain
2021-02-09 17:02 ` Kalle Valo
2021-02-09 15:55 ` Jeffrey Hugo [this message]
2021-02-09 16:06 ` Loic Poulain
2021-02-09 17:27 ` Bhaumik Bhatt
2021-02-09 18:17 ` Loic Poulain
2021-02-10 4:37 ` Bhaumik Bhatt
2021-02-10 8:17 ` Manivannan Sadhasivam
-- strict thread matches above, loose matches on Subject: below --
2021-02-09 15:52 Loic Poulain
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