firmware: arm_scmi: Protect device request lookup with RCU

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The SCMI device request notifier looks up protocol OF nodes from the
active_protocols IDR. The IDR lookup can run concurrently with protocol
activation while probe is still registering protocols and creating their
SCMI devices.

Wrap the lookup in an RCU read-side critical section as required by the
IDR API for lockless readers.

Fixes: 53b8c25df7 ("firmware: arm_scmi: Add common notifier helpers")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Link: https://patch.msgid.link/20260714-scmi_core_fixes-v6-9-3afe499d46e3@kernel.org
Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>

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Sudeep Holla 2026-07-14 13:56:28 +01:00

parent a71a3d4d8a

commit e6a0e7a49d

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drivers/firmware/arm_scmi/driver.c

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