perf: xgene: initialize lock before requesting IRQ

xgene_pmu_probe() requests the PMU IRQ before initializing
xgene_pmu->lock. request_irq() enables IRQ handling before it returns,
so xgene_pmu_isr() can run in this window and acquire the uninitialized
raw spinlock.

Initialize the lock before requesting the IRQ so the handler always sees a
valid lock.

Fixes: 832c927d119b ("perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver")
Cc: stable@vger.kernel.org
Assisted-by: Codex:GPT-5
Signed-off-by: Runyu Xiao <runyu.xiao@seu.edu.cn>
Signed-off-by: Will Deacon <will@kernel.org>

0 files changed, 0 insertions, 0 deletions