Re: [PATCH] clk: at91: check pmc node status before registering syscore ops
From: <hidden>
Date: 2021-09-13 13:44:43
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linux-clk, lkml
On 13.09.2021 11:26, Clément Léger wrote:
EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe Currently, at91 pmc driver always register the syscore_ops whatever the status of the pmc node that has been found. When set as secure and disabled, the pmc should not be accessed or this will generate abort exceptions. To avoid this, add a check on node availability before registering the syscore operations. Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Reviewed-by: Claudiu Beznea <redacted>
quoted hunk ↗ jump to hunk
--- drivers/clk/at91/pmc.c | 5 +++++ 1 file changed, 5 insertions(+)diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c index 20ee9dccee78..b40035b011d0 100644 --- a/drivers/clk/at91/pmc.c +++ b/drivers/clk/at91/pmc.c@@ -267,6 +267,11 @@ static int __init pmc_register_ops(void) if (!np) return -ENODEV; + if (!of_device_is_available(np)) { + of_node_put(np); + return -ENODEV; + } + pmcreg = device_node_to_regmap(np); of_node_put(np); if (IS_ERR(pmcreg)) --2.33.0
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