Messages in this thread | | | Subject | Re: [PATCH v2] usb: dwc3: core: Add shutdown callback for dwc3 | From | Stephen Boyd <> | Date | Wed, 14 Apr 2021 09:02:21 -0700 |
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Quoting Sandeep Maheswaram (2021-04-13 23:03:29) > This patch adds a shutdown callback to USB DWC core driver to ensure that > it is properly shutdown in reboot/shutdown path. This is required > where SMMU address translation is enabled like on SC7180 > SoC and few others. If the hardware is still accessing memory after > SMMU translation is disabled as part of SMMU shutdown callback in > system reboot or shutdown path, then IOVAs(I/O virtual address) > which it was using will go on the bus as the physical addresses which > might result in unknown crashes (NoC/interconnect errors). > > Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org> > ---
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
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