firmware: arm_ffa: Fix per-vcpu self notifications handling in workqueue

Per-vcpu notification handling already runs from a per-cpu work item on
the target cpu. Routing that path back through smp_call_function_single()
re-enters the call-function IPI path and executes the notification
handler with interrupts disabled. That makes the framework path unsafe,
since it takes a mutex, allocates memory with GFP_KERNEL, and invokes
client callbacks.

Handle per-vcpu self notifications directly from the existing per-cpu
work item instead. This keeps the per-vcpu path in task context and
avoids the extra IPI hop entirely.

Fixes: 3a3e2b83e805 ("firmware: arm_ffa: Avoid queuing work when running on the worker queue")
Link: https://patch.msgid.link/20260428-ffa_fixes-v2-4-8595ae450034@kernel.org
Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>

0 files changed, 0 insertions, 0 deletions