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clocksource/drivers/dbx500-prcmu: Check timer register mapping

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Return -ENOMEM if of_iomap() fails, before reading or configuring
the timer register block.

Detected by static analysis and reviewed with AI-assisted source auditing.

Fixes: 9d2aa8c796 ("ARM/clocksource: use automatic DT probing for ux500 PRCMU")
Assisted-by: LLM
Signed-off-by: Slavin Liu <bolin.liu@seu.edu.cn>
Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260911060917.94310-1-bolin.liu@seu.edu.cn
This commit is contained in:
Slavin Liu 2026-09-11 14:09:17 +08:00 committed by Daniel Lezcano
parent 0d3a67b195
commit 8f30b035a6
1 changed files with 2 additions and 0 deletions
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2
drivers/clocksource/clksrc-dbx500-prcmu.c
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@ -52,6 +52,8 @@ static struct clocksource clocksource_dbx500_prcmu = {
static int __init clksrc_dbx500_prcmu_init(struct device_node *node)
{
clksrc_dbx500_timer_base = of_iomap(node, 0);
if (!clksrc_dbx500_timer_base)
return -ENOMEM;
/*
* The A9 sub system expects the timer to be configured as