From: Clément Léger Date: Mon, 13 Sep 2021 08:26:33 +0000 (+0200) Subject: clk: at91: check pmc node status before registering syscore ops X-Git-Tag: v6.1-rc5~2625^2~19^5~14 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c405f5c15e9f6094f2fa1658e73e56f3058e2122;p=platform%2Fkernel%2Flinux-starfive.git clk: at91: check pmc node status before registering syscore ops 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 Link: https://lore.kernel.org/r/20210913082633.110168-1-clement.leger@bootlin.com Acked-by: Nicolas Ferre Reviewed-by: Claudiu Beznea Fixes: b3b02eac33ed ("clk: at91: Add sama5d2 suspend/resume") Signed-off-by: Stephen Boyd --- diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c index 20ee9dc..b40035b 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))