linux-kernel - Re: [PATCH v3 1/2] clk: xilinx: vcu: unregister pll

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Message-ID: <175054276458.4372.13734001282575754373@lazor>
Date: Sat, 21 Jun 2025 14:52:44 -0700
From: Stephen Boyd <sboyd@...nel.org>
To: Rohit Visavalia <rohit.visavalia@....com>, michal.simek@....com, mturquette@...libre.com, vishal.sagar@....com
Cc: javier.carrasco.cruz@...il.com, geert+renesas@...der.be, u.kleine-koenig@...libre.com, linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Rohit Visavalia <rohit.visavalia@....com>
Subject: Re: [PATCH v3 1/2] clk: xilinx: vcu: unregister pll_post only if registered correctly

Quoting Rohit Visavalia (2025-02-10 03:36:13)
> If registration of pll_post is failed, it will be set to NULL or ERR,
> unregistering same will fail with following call trace:
> 
> Unable to handle kernel NULL pointer dereference at virtual address 008
> pc : clk_hw_unregister+0xc/0x20
> lr : clk_hw_unregister_fixed_factor+0x18/0x30
> sp : ffff800011923850
> ...
> Call trace:
>  clk_hw_unregister+0xc/0x20
>  clk_hw_unregister_fixed_factor+0x18/0x30
>  xvcu_unregister_clock_provider+0xcc/0xf4 [xlnx_vcu]
>  xvcu_probe+0x2bc/0x53c [xlnx_vcu]
> 
> Fixes: 4472e1849db7 ("soc: xilinx: vcu: make pll post divider explicit")
> Signed-off-by: Rohit Visavalia <rohit.visavalia@....com>
> ---

Applied to clk-next