Messages in this thread | | | Subject | Re: [PATCH V7 2/2] i2c: i2c-qcom-geni: Add shutdown callback for i2c | From | Akash Asthana <> | Date | Wed, 30 Dec 2020 14:56:57 +0530 |
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On 12/21/2020 6:08 PM, Roja Rani Yarubandi wrote: > If the hardware is still accessing memory after SMMU translation > is disabled (as part of smmu shutdown callback), then the > IOVAs (I/O virtual address) which it was using will go on the bus > as the physical addresses which will result in unknown crashes > like NoC/interconnect errors. > > So, implement shutdown callback to i2c driver to stop on-going transfer > and unmap DMA mappings during system "reboot" or "shutdown". > > Fixes: 37692de5d523 ("i2c: i2c-qcom-geni: Add bus driver for the Qualcomm GENI I2C controller") > Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org> Reviewed-by: Akash Asthana <akashast@codeaurora.org>
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