Hi,
Thanks for the review Stephen.
On 6/22/2020 2:33 PM, Stephen Boyd wrote:
Quoting Maulik Shah (2020-06-21 23:53:25)
rpmh-rsc driver is fairly core to system and should not be removable
once its probed. However it allows to unbind driver from sysfs using
below command which results into a crash on sc7180.
What is the crash? The world falls apart because rpmh APIs start
referencing pointers that point to freed memory?
Yes.
echo 18200000.rsc > /sys/bus/platform/drivers/rpmh/unbind
Lets prevent unbind at runtime by setting suppress_bind_attrs flag.
Ok. But when the Android module brigade comes knocking they'll have to
revert this change and solve this problem too. Have fun!
No should not need to revert this change.
Even if rpmh-rsc is planned to be loadable module for android, Once
loaded it should be disallowed to be removed.
same is the case for PDC irqchip as well. these drivers are core to the
system and shouldn't be allowed to rmmod/unbind.
Thanks,
Maulik
Signed-off-by: Maulik Shah <mkshah@xxxxxxxxxxxxxx>
---
Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
